The Diesel Page
Member's Area

Duramax Page

Updated June 17, 2009

Many of these articles are reserved for current subscribers. If you're not yet a member, please visit this link to see how easy and inexpensive it is to become a member and supporter of The Diesel Page.

Product Review: Factory exhaust systems have improved considerably though the years, with mandrel-bent 3-1/2" or 4" tubing now being the norm. You've probably read quite a few exhaust system reviews through the years, and saw the rear-wheel horsepower improvement following the installation of a performance exhaust system. The installation photos were nice and the dyno numbers usually reinforce the notion that an aftermarket exhaust system allows the engine to make more power and help to provide a safety margin when installing performance products. What's the real story?

As is typical for any production engine, the manufacturer can introduce design changes throughout the production life as experience is gained through warranty repairs. GM recently released the most recent upgrade in cylinder head gasket design as well as new head bolt torque specifications for the LB7, LLY and early LBZ engines. The second-generation head gasket will require a new lower head bolt torque angle specification as well as special cleaning methods for the head/block gasket surfaces. Go here for all of the details.

Product review: Being able to read and erase trouble codes is a basic necessity these days - especially for anyone owning a GM diesel truck that is out of warranty. Even if your truck is still covered by the factory powertrain warranty, knowing what that "service engine soon" light means and how serious the problem might be can help you when scheduling service or can help you gain some insight into what the problem might be. The inexpensive T50e can can help you save money on vehicle maintenance.

To promote goodwill and maintain the reputation of the Duramax 6600, GM offered a generous 7-year or 200,000 mile injector replacement warranty to all LB7 owners. This was good news to those owning 2001-2004.5 Duramax equipped truck, and the extended warranty did save a lot of owners a lot of money on injector replacement. But, all that has already or will soon be coming to an end. The first LB7 Duramax powered trucks are coming up on nine years old. The first two model years for the Duramax are now past the 7-year time limit, and those owners have to bite the bullet and pay for any injector replacement out of their own pocket. For the past thirteen years The Diesel Page has been here to help members save money on engine service, and that's why we're presenting this do-it-yourself fuel injector replacement tech story.

After a long winter here in the Northwest U.S., most diesel pickup owners are ready for a trip to the Southwest - Southwest Canada to be precise, the home of BD Diesel Performance and their semi-annual Dyno Day. Despite the gray skies, hundreds of diesel enthusiasts made their way to Abbotsford, British Columbia last spring on April 5th, and a total of sixty trucks spun the rollers from early morning through late afternoon. If you like power, this was a great way to spend a day, to both learn more about diesel performance and have an opportunity to see trucks push the Mustang dyno to nearly 1000-hp.

Bringing new life to an older truck is more than just a way to save a ton of money. A surprising number of members keep the same vehicle for decades, and want to do all they can to keep it on the road. Converting the drivetrain to Duramax/Allison power has become a popular upgrade for the GM fans, which increases the vehicle's capability. Member Kean Clark is currently working his way through a 1987 Chevy C30 restoration and Duramax conversion project, and we wanted to share his progress with the GM community.

The question of whether we should be using synthetic diesel motor oil in our GM diesel engines has been a popular subject for a long time. Synthetic oil has some definite advantages over the available conventional motor oils, but are there any measurable benefits that justify the added expense? Find out here!

This annotated Diagnostic Trouble Code (DTC) list is specific to the Allison 1000 automatic transmission. Being armed with a good basic knowledge about the Allison trouble codes can help to ensure a better level of service if you have an in-warranty truck or can save you a lot of money if your truck is now out of warranty.

This annotated Diagnostic Trouble Code (DTC) list contains all of the Duramax diesel engine-specific trouble codes relating to the engine. We've learned through the years that while a typical GM service technician may understand gas engines and their related powertrains quite well, a talented diesel mechanic is much harder to find. Being armed with a good basic knowledge about the diesel systems incorporated into your truck can help to ensure a better level of service if you have an in-warranty truck or can save you a lot of money if your truck is now out of warranty. Want to know what the codes are, what they mean, how to retrieve them and know how to repair the problem?

Back about the time the auto makers began using electronic fuel injection, they discovered that for the onboard computer to correctly calculate the fuel/air ratio, they needed to measure the incoming air flow to the engine. Electronic fuel injection not only allowed the engine to run more efficiently and to produce better fuel economy and drive-ability, but MAF sensor data also allowed the computer to help protect the engine if the ratio of fuel to air fell outside of normal. The Duramax diesel also employs a MAF sensor, which is used to measure the grams/second of air entering the engine's intake system.

The 2001 model-year and newer GM Duramax diesels were all equipped with the "drive-by-wire" Bosch high-pressure common-rail electronic fuel injection system. While the Accelerator Pedal Position (APP) module has performed reliably through the years, the first Duramax equipped trucks are now more than 8 years old, and knowing how the APP operates and how to troubleshoot a problem could be a huge help in the future. Thirteen diagnostic trouble codes are discussed, and we'll walk you through the troubleshooting process.

Those of us who have been following GM's on-again off-again diesel Suburban program over the past eight years were beginning to lose faith whether we would ever see a production version. The wait may be coming to an end as GM unveiled its proposed 4.5L Duramax powered Suburban to an enthusiastic crowd during last fall's annual SEMA show. The most recent news we have is that GM will begin production of the 4.5L V-8 sometime in the second half of 2009 (as a 2010 model year), and will introduce this new engine in a variety of full-size vehicles, including the popular Suburban. Go here for more engine details.

Product Review: A dual-bypass oil filtration system and synthetic motor oil can extend drain intervals by at least 8 times when compared to conventional oil and filters, and can extend the life of your engine. Follow along as we show you how to install Amsoil's Dual By-Pass oil filteration system and show you the analytical results of cleaner oil.

All those who haven't been living under a rock have probably noticed that the cost of diesel fuel has risen to the "Arm & Leg" level at your neighborhood fuel station. You have to know that the "five finger discounters" have also noticed. Save money on your fuel costs by buying a genuine diesel locking fuel cap directly from your local GM dealer. Go here for the installation instructions. Now available to subscribers in the Member's Area.

This editorial is the result of a conversation we were having in our bulletin board forum about exporting diesel fuel and high diesel fuel prices, which motivated me to dig deeper into our nation's energy policies and use of petroleum. What I learned is that time is running out. Aside from the opinions expressed, this editorial catalogs what conventional and unconventional oil sources currently exist here in the United States. Almost everyone believes that becoming energy independent is vital to the future of the country. How much oil are we using? How much is the world using? How much are we paying for imported oil, and how long can we continue to pay? Do we have the will to become energy independent? Do we actually have a choice?

We've always been concerned about fuel economy. That's why many diesel owners bought a diesel in the first place, and is precisely why I bought a 6.2L diesel powered GMC K1500 in the 1980's. Compared to today, fuel was relatively cheap back in the day, but nearly everyone was still concerned about the cost of fuel. Where we once saw diesel fuel at less than $1.30/gallon in the mid 90's, as of May 2008 we're seeing a painful $4.30 or higher. This upward trend will likely continue. What we hope to do here is illustrate powertrain management strategies and modifications that can help to improve fuel economy and save you money.

Like many of you who use your diesel pickup truck or Suburban to tow trailers or haul heavy loads, I use my Suburban to tow a 30 foot travel trailer that tips the scales at a hefty 8500#. Over time, this has caused the rear springs on my 3/4 ton Suburban to relax so that the rear now sits lower than the front even while unloaded. With models available to fit all 6.5L or Duramax powered pickup trucks and Suburbans, I eventually settled on the AirLift adjustable air springs as being the best solution to this problem. Follow along as we take you through the kit introduction, installation and show how the air springs solved the problem.

The Diagnostic Trouble Code P0093 applies to the 2001 model-year Duramax. This trouble code was updated for the 2002-2004 model year engines, and received a new number - P1093. Each refers to the same problem. P0093 & P1093 are defined as "Fuel System Large Leak Detected", which could mean that one or more injectors are experiencing a high fuel-return flow rate. People usually start looking beneath the truck for signs of fuel, but this isn't that kind of a leak. Let's have a look at these, and other related trouble codes, to provide a little more insight into what they mean and how to deal with them.

For several years now, we've been hearing reports of transfer case fluid leaks due to a wear-through on the rear case half. If not caught before a leak develops, the transfer case could suffer complete failure due to a lack of lubrication. The most reliable solution includes installing an aftermarket part that prevents a case wear-through from happening. Follow along as we show you the problem and describe what it takes to produce a permanent solution.

I had the exhaust system off my '01 GMC recently and noticed that my truck's downpipe bracket had broken. Find out how to inexpensively repair this somewhat common problem. Available to subscribers now in the Member's Area.

Seemingly overnight, diesel drag racing has swept the nation, and is becoming more popular as each racing season passes. To help fill the need for speed, more retired Pro-Stock drag race trucks are being brought out of retirement, but not to run blown nitro burning bigblocks. Nope... The trucks are rocketing down the track with the state-of-the-art in diesel performance. Brad Makinen brought new life to a retired gas Pro-Stock truck in the form of "Dirtymax", a Duramax diesel powered Chevy 1500. This truck appeared at a drag race event I attended this past June here in Montana, which provided an opportunity to look beneath the fiberglass skin to see what it takes to make a Pro-Stock diesel run in the 8-9 second range. Available now in the Member's Area.

Learning more about turbocharger theory can help the performance-oriented Duramax owner achieve a level of cool-running and long-term performance beyond that provided by the factory turbocharger. Available now in the Member's Area.

A recent pickup truck ad I saw on television said: "Truck guys will tell you taking off with 10,000-lbs ain't no picnic. Stopping 10,000-lbs ain't no picnic either." We agree. Towing tests are few and far between in the automotive media. Most of what we see are dyno results, 1/4-mile elapsed times, and generalized reports about on-road capability. Those types of tests can provide some clue about what we might expect to see while towing a heavy trailer, but they fall short of a real towing evaluation. Part of what most potential GM & Ford buyers really want to know is how the newest diesel pickups stack up against one another in a real-world towing test on a real hill while towing a trailer that weighs at least 10,000-lbs. That's what this test was all about.

General Motors announces an all-new 4.5-liter V-8 Duramax high-output diesel engine for the Chevrolet Silverado and GMC Sierra light-duty pickup trucks and the HUMMER H2. The engine fuel efficiency offers a 25 percent advantage compared with gasoline engines. Environmental benefits of the new engine include a 13-percent reduction in CO2 versus gasoline engines, and at least a 90-percent reduction in particulates and NOx when compared to diesel vehicles today. GM-Media News Release

First events are always fun to attend, and US Diesel Parts' first annual Dyno Days, held this past June 2nd, turned out to be a well-attended and all-around fun event for just about any diesel or automotive enthusiast. The rollers on the Mustang MD-1100 dyno were spun thirty two times by a variety of diesel pickups, as well as classic and contemporary muscle cars. Diesel pickups were the big power producers, with seven of them making more than 500 horsepower, and TDP's Lil Red topped the list with 632. We also saw a brand new Ford 6.4L PSD and a new LMM Duramax diesel spin the rollers. Click the above link to learn more.

After six years and nine months of continuous production, DMAX Ltd., the maker of the Duramax 6600, celebrated producing its 1,000,000th engine on April 16, 2007. According to DMAX, they can sell all of the engines they produce and more. Go here to see the story and learn more about what makes the Duramax 6600 so successful.

The new VIN code 6 2007i LMM Duramax equipped trucks have arrived, and along with them the new DOC/DPF (Diesel Oxidation Converter/Diesel Particulate Filter). Changes in the emissions system are the big news, and this article should help to explain what's new & different and shine a light on what LMM owners need to know to have the fewest problems. Go here to see original photos of the new emissions components, and learn how these components function. Do we need to worry about the 2007 emissions systems? Available now in the Member's Area.

I recently upgraded the stock mirrors on my 2005 GMC 2500HD to the 2006 model trailer towing mirrors. Although the stock mirrors extended for trailer towing, I was not happy with the narrow field of view the stock mirrors provided. For the 2006 model year, GM released a new style extendable towing mirror, similar to the Ford SD towing mirrors. Go here for a photo illustrated step by step guide to installation. Available now in the Member's Area.

Here, you'll find 43 of the top GM Technical Service Bulletins pertaining to these trucks and the Duramax/Allison drivetrain. Included are the bulletin number, the title and a summary for all 43 listed bulletins. This compilation contains great information you need to know. Available now in the Member's Area.

Going all the way back to 2000, GM has admonished technicians and vehicle owners not to allow the metal-cased ECM (Engine Control Module) and TCM (Transmission Control Module) to be used as a grounding location that could subject the electrical system to excessive electrical current. Find out what happens when this occurs.

Designed to meet the 2007 emissions regulations, the 2007 LLM & LMM Duramax 6600 diesel engines have met the challenge, and continue to lead in power & torque. More power and torque are the good news. Go here to learn all of the details about the new engine and its application.

Trucks at SEMA were there to attract attention - and boy did they! Each of the 2100+ Vendors and manufacturers who attend the annual Specialty Equipment Market Association event needed something special to lure some of the 100,000+ passers-by (and the media) into their booth. Having an eye catching truck helps them do just that, and this year was no exception. Here is a collection of GM, Ford & Dodge (and Toyota) trucks I thought stood out in some way from the others at SEMA 2006. Have a look!

Product Review: The Allison 1000-Series 5/6-speed transmissions are simply the best and most durable automatics to ever have been installed in a pickup truck. When using stock power, it's practically impossible to hurt the transmission or exceed its torque handling capability. As good as the Allison is, however, it's still possible to exceed its torque handling capability when using a power adder. Most Allisons will hang onto at least 75 additional horsepower and 200 lb-ft of torque, but living on the ragged edge can take a toll on long-term durability. This is why installing a performance-built Allison can increase the fun!

A new 2-piece door hinge design was introduced along with the 1999 Silverado/Sierra body style trucks. Instead of using replaceable pins and bushings used by the earlier truck hinges, these new hinge pin assemblies utilize a swaged-on two-piece design, installed with non-serviceable Teflon lined bushings. Once they wear out (and they surely will), you're looking at big bucks for replacement. Fortunately, Automotive Hinge Solutions offers precision-made and grease-able replacements that could outlast the truck itself.

Operating a diesel engine during the cold winter months demands that all diesel fuel and electrical systems operate normally. Diesel mechanics will tell you that their business activity picks up considerably beginning in about October due to the cooler temperatures. The list of precautionary measures and cold weather tips included here should help your diesel operate reliably throughout the winter.

We all spend a lot of time making our trucks run faster and pull stronger. While that aspect of towing is very important, being able to safely bring your truck and trailer to a stop is perhaps even more important. Follow along as we show how to properly install an electronic trailer brake controller.

Reducing emissions components found in diesel exhaust is not without its share of engineering challenges and increased cost. While some fear for the future of the light-truck diesel market, we here at The Diesel Page remain optimistic - in fact, confident that the current trend in light-truck diesel usage will continue. Go here to find out what we'll need to know and how the new fuel and emissions requirements will affect all of us.

GM has a lot riding on the 2007 model year. With nearly 50% of all new vehicles sold in the U.S. being pickup trucks, this market is something General Motors simply has to do well in. Introduced as a 1999 model, the outgoing Silverado is now eight model years old, and has begun losing ground to the fresh faces offered by both foreign and domestic competitors. Enter the GMT-900, a new for 2007 body style that introduces a long list of refinements in addition to all new sheet metal. Included here are new photos and information about the new 1500 series trucks, and we'll discuss how the design features shown here could appear in the upcoming 2500HD/3500.

A looming grade can either induce dread or anticipation; depending on whether you're driving the highest rated diesel pickup the "big three" have to offer. Included here is an accounting of the 12 trucks that pulled the hill this year, which included 4- Duramax's, 4- Powerstrokes, 2- Dodge Cummins, and 2- 6.5TD's. Find out what truck is the King of the Hill.

After considering all the various cold air intakes systems available for my truck, I decided to develop my own, which only cost a few dollars and an hour or so to complete. Keeping the intake air as cool as possible improves power and may improve fuel economy. While inexpensive, this modification retains the excellent filtering ability of the stock air intake system.

Ok, you just bought a new (or new to you) Duramax diesel truck. You might be wondering what you need to know about diesel engines to get the fuel economy, power and reliability diesel engines are noted for. What you'll find here is essential information specific to the GM diesel engines that could help eliminate some of the problems experienced by new diesel owners, and help you get more out of your "new" diesel engine.

This is simply the best Duramax fuel filter replacement information available anywhere. Great photo-illustrated step-by-step procedure that'll help you be successful the first and every time you need to change your fuel filter.

Product review: Last month we showed you how to update the 2001-2004 LB7 Duramax ECM with one programmed for more power & better fuel economy. This month, we look at the 2004.5-2005 LLY Duramax ECM.

Product review: The various electronic power products have done a remarkable job of increasing Duramax diesel performance, but till now, we've had to accept whatever programming or tuning options were offered by the aftermarket. The recent appearance of custom ECM (Engine Control Module) programming has increased the number of options for nearly every truck owner, whether they're looking for a few more miles per gallon, a safe towing program or a killer track tune. Kennedy Diesel is now offering custom ECM tuning, which provides for a host of additional programming features.

In an effort to reduce cold-start induced white smoke, GM has upgraded the glow plugs, the glow plug controller and the ECM programming on a continuing basis since first introducing the first Duramax 6600 in the fall of 2000. The 2006 Duramax, identified as either RPO code LLY (early '06 models) or LBZ (late '06 models), saw another glow system upgrade. Faster-acting glow plugs and shorter cycle times combine to further reduce white smoke after a cold start, while helping to make diesel engine operation more transparent to those more familiar with starting a gas engine. However, there have been a few bumps in the road regarding the 2006 glow system.

Part of the mystery in servicing automotive air conditioning systems for most people is a lack of understanding in the technology. While it does require specialized equipment and training to know all that is knowable, acquiring a basic understanding of what the various system components do and learning how they work together to produce cool air inside your vehicle will help in maintaining your A/C system - whether you do the work yourself or choose to hire the professionals. Go here to learn how to evaluate and recharge R-134a GM A/C systems.

Read about GM's GMT-900 body styling changes. How will this translate to the 2500HD/3500 pickup trucks?

Fuel Quality can determine whether your diesel fuel injection system provides typical service or whether you are plagued with frequent visits to the dealership. GM recently upgraded the factory fuel filter element in an effort to help protect the Bosch high-pressure common-rail fuel injection system used by the Duramax 6600. Trapping more and smaller particles in the fuel can improve both fuel quality and injection system longevity. Lubrication Specialist Greg Landuyt has developed an easy to install and cost effective auxiliary fuel filter kit that can add a significant safety margin to the diesel fuel you're using.

As diesel fuel injection systems become more complex and more sensitive to fuel quality, owners have become more tuned-in to the nature of diesel fuel systems. Being able to check fuel pressure (vacuum) can help an owner diagnose a future problem or allow him to monitor the condition of the fuel filter in an on-going basis. This not only can save you a lot of frustration in the high-stakes game of vehicle service, but can save you money on fuel filters by not replacing them till the fuel restriction gauge tells you it's time.

There's an old saying that says "offer a great $5 part that installs in 5 minutes, and you'll sell a million of them." Well, the KD boost valve might be a little more than $5, but it is still inexpensive, installs in minutes, and offers a lot of bang for the buck. This simple device increases maximum boost pressure about ~5-8 psi, and makes the factory LB7 turbo a lot more responsive under all operating conditions. Combine this with any one of a variety of Duramax power mods, and you'll see an even bigger improvement in power than what a power mod by itself delivers.

The third annual Edge Products' "Weekend on the Edge" event was held near Salt Lake City, Utah this past September. For anyone who loves diesel engines, fast trucks and big-big power, this was a weekend you didn't want to miss. Click the above link to read more about it.

We hear of Allison fluid leaks every once in a while, and have recently experienced one ourselves. Most of these leaks result in automatic transmission fluid dripping off the bellhousing area of the transmission. An input shaft seal problem probably comes to mind first, but as we've learned, these seals are rarely the cause. Follow along we show you what to look for and how to repair a leaky Allison.

The 2006 model-year Chevy & GMC diesel 2500HD/3500 pickups began arriving on dealer lots in August of 2005. While not much has been added or changed to the 2005 model pickup styling or option list, the big news is the new RPO code LBZ Duramax 6600 diesel engine. Go here for a look at the new trucks and to learn more about the new uprated Duramax diesel engine.

Making big power these days requires help to burn all of the fuel provided by the power modules and programs used in competition, and nitrous helps burn that fuel and make more power. If you're after the most Duramax diesel performance, all roads lead to nitrous oxide.

The number of different gauges and gauge accessories has grown considerably since our 2002 gauge install piece. I recently stopped by to see the folks at USDieselParts.com, and got acquainted with what's new for those looking for gauges and gauge accessories. Let's have a look.

An important ingredient in truck appearance is one of proportions. Design engineers consider cab height, cab length, box length, fender well openings and many other appearance details for proper proportions. Tire size is another proportional feature that plays into how we perceive the appearance of a pickup truck. Most agree the factory tire size of 245/75R16 has always appeared to be too small. Nearly all agree - except that is, for GM.

A bright yellow Service Engine Soon or Message Center warning usually means trouble. Luckily, this "Service 4WD" Message Center warning light often means you'll just need to replace the pushbutton switch panel that controls the NV-263 selectable-shift transfer case (RPO code NP1). Go here to find out how.

Performance tuning/flash programmers appear to be carving out a market with the Duramax performance crowd - and for good reason. Programmers offer a number of unique features that make them a "must have" for any Duramax owner. Here is a brief summary of five Duramax power programmers, and a list of features available for your Duramax.

Aside from making your new Duramax diesel truck look cool, boost pressure and EGT (exhaust gas temperature) gauges are important tools that help you manage the powertrain and help protect your diesel engine when increasing power. Follow along as we explain how important these gauges are, and show you how to install them.

We're always looking forward to the mid-year announcements of the upcoming model lineup for GM's 2500HD/3500 pickup trucks. Evolutionary changes to both the exterior appearance and to mechanical/electrical systems enhance function and help improve ownership satisfaction, and the 2005 models continue that tradition. While we tend to focus on the 2500HD/3500 models, you'll find the powertrain specs for the gas engine equipped trucks here as well as those powered by the Duramax diesel.

Product Review: You hold in your hands one of the most remarkable power upgrades available... So begins Edge's product description on the back of the box. After having spent some time with the new Juice/Attitude, I tend to agree. In addition to the 5-level 0-150 horsepower increase (depending on model) available at just the touch of a button, the Edge Juice with Attitude monitor combine to produce a truly comprehensive engine performance package for the Duramax diesel.

Product Review: Squeezing the last bit of performance out of a turbo diesel involves improving exhaust flow and intake airflow. Performance air intake systems are the best way to help your engine breathe, and AFE produces a line of products to help achieve maximum intake air flow. Documenting performance improvements using a chassis dyno helps answer many questions, and we thought you might be interested to learn what we discovered after installing an AFE Stage II performance air intake system on our 2001 GMC 2500HD equipped with the Duramax/Allison.

Introduced in January of 2004, the RPO code LLY Duramax 6600 incorporates a number of significant technology changes. Two forces control diesel engine evolution for all engine manufacturers - Emissions compliance and market share. The technology changes introduced with the LLY address both of these forces. Creating an engine with more power and lower emissions has become more challenging, but that's exactly what the LLY delivers.

The Neutral Start Back-Up switch (NSBU) relays angular position of the transmission shift selector shaft to the vehicle Transmission Control Module. The NSBU has caused a problem for some of the early Allison equipped pickups, which eventually resulted in the release of a new & improved NSBU. This short treatise should help you effectively troubleshoot an NSBU related problem, and quickly and inexpensively return the vehicle to service.

General Motors has extended the Duramax 6600 fuel injector warranty coverage for owners of all 2001 through 2004 model-year Chevrolet and GMC Duramax 6600 equipped pickup trucks. Go here to read all about it.

The exterior of the truck was finally completed on the evening of May 13th. That week was rather hectic as we pushed to make the truck ready for a local auto show held in Missoula, Montana on the 15th. We were able to attend, and had a great time, even though there were just 38 miles on the drivetrain upon arriving at the show. The photos shown here were taken that morning. Go here to see the completed exterior truck photos.

Product Review: General Motors' 6.6L Duramax turbocharged diesel engine was introduced in the 2001 model year 2500HD/3500 pickup trucks and chassis cabs. Along with the new engine came the Bosch high-pressure common-rail fuel injection system. Fuel pressures as high as 23,000-psi demand much from the high-pressure pump and solenoid-controlled fuel injectors, and the less than stellar quality and cleanliness of the available diesel fuel here in the US may present some durability and longevity challenges for these components. Supplemental fuel filtration may be required.

Product Review: Today's performance air filters must excel at two vitally important and yet polar opposite functions. First, they must allow the engine to breathe without unnecessarily restricting airflow. Second, today's performance air filter is also judged by its dirt capturing ability. Truck owners in the know demand an air filter that allows an engine to perform up to its full potential yet stops virtually 100% of all harmful dust and other airborne contaminants. Creating the perfect blend of unrestricted airflow and maximum dirt stopping ability is the goal of today's performance air filter manufacturers.

Chevrolet's flagship SUV just got a significant boost in power and capability. Effortless towing and the potential for 20+ miles per gallon make this arguably the best Suburban ever...

Here are more of Ron Wong's great TX State Fair photos that are used to illustrate a GM description of the new Duramax Bosch fuel injection system.

The new GM Duramax 6600 made its official public debut at the Texas State Fair late last month. Find out what we learned from a close-up and detailed examination of GM's new diesel. This report contains many photos, and a technical discussion on the technology used in this brand new state-of-the-art light truck diesel engine.