Readers' Rigs

This page illustrates some of GM diesel vehicles Readers of the Diesel Page own or drive. This month's photo and story comes to us from member John Culver.
December 1999



1977 GMC 1-ton Crew Cab Dually
Isuzu 6BD1 Turbo Diesel

Here is a basic description of my truck.

Engine Isuzu 6BD1, Isuzu's 6B engines, I was told, are the most popular Isuzu engine made, possibly world wide #1

During a trip to the Oregon coast last summer with this truck and an 11-½' camper, at a gross weight of 12,000 lbs, we traveled 454 miles and saw 16 MPG. With the 2-spd I can keep my rpm's within a 500 rpm window. I normally upshift at 2300, which drops the engine rpm down to 1800. 2000 rpm in 4th-over equals 60 mph. All this is with 4:10's , Ranger 2spd 22% OD and 235/85R16 tires.

John Culver
Member #487


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