Home of all dually trucks with the GMC/Chevy 3500HD series truck a point of interest.

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You can appreciate the “beef” of the GMC/Chevy 3500HD trucks, a stripped rolling 3500HD chassis weighs more than a running C1500!

When posting on this site you won't have to explain what the 3500HD Beast is! ie 19.5 wheels, straight axle, 10 bolt wheels, 15000lbs GVW, 4 Wheel Disc Brakes etc

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Welcome to the forum created October 2009

Recent Posts

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Member Projects / Re: 94 GMC 4x4 cummins
« Last post by ED-NY on May 31, 2018, 07:18:03 AM »
FYI only..I ran the fuel filler neck out back between the frame rails so I could keep the flatbed height low.
Member Projects / Re: 94 GMC 4x4 cummins
« Last post by fabman72 on May 28, 2018, 05:03:09 PM »
Thanks Ed, I am building a front bumper and a flatbed for it now will try and get more pictures soon.
Member Projects / Re: 94 GMC 4x4 cummins
« Last post by ED-NY on May 26, 2018, 05:27:20 PM »
What a piece of art!
Member Projects / Re: 94 GMC 4x4 cummins
« Last post by fabman72 on May 26, 2018, 04:14:00 PM »
Here is whats done so far.
Ed can you turn these pictures i cant figure it out

Here ya go..try turning the camera 90 degrees left ;D
I put a 94 3/4 ton cab on a 1995 3500HD former diesel chassis. Motor bolted right up, I used the NV4500 tranny from the 95 diesel so I didn't have any driveshaft concerns.  The NV4500 also has the parking brake drum tail shaft...not sure how your THM400 is set up.

Installed a 350 engine with tune port injection and wired in a TPI (730) ecm.

Repining the 94 gas/TBI cab to accept the 730 ecm wasn't hard.   If your 88 driveline is TBI it's really not too hard to convert the harness into a 4 wire standard alone harness and run the 88 ecm.

I used the 95 diesel chassis lift pump fuel line connection for my gas fuel filer (bolted right in). I bought a gas sending unit for the diesel tank and installed a TPI fuel pump....the tank worked but there is no gas splash pan in the diesel tank. If you run TBI you need the lower pressure TBI internal pump.

One important item was that the  95 diesel chassis had both the fuel supply line (3/8) and a non functioning return line (5/16). It was non functioning because there was a rubber block in the return line line junction near the lift pump area.

I am swapping 1988 454 400 into 2000 3500 hd diesel. the diesel motor is gone rolling chassis truck i bought. I dont care about mpg. going to use the truck maybe 3000 miles a year pulling grain wagons etc.

the 1988 doner truck had a dash fire 88k miles motor has 12k. computer harness melted in dash fire. picture 100% mint 1988 c3500 with dash wiring and hvac case missing seats carpet etc mint.

I will have to run a carb and msd box. will the motor mounts work from the 1988 in the 2000? I will have to fab a drive shaft. flush the tank and run a carb fuel pump. will the speedo work or can i make it work?

will the radiator etc front dress all work?

I do have a 1995 350 c3500 parts truck has wring but its high pressure tbi vs 1988 454 had low pressure
i also have a 1994 6.5l diesel cab complete

i wanted to salvage the 1988 so clean but cannot locate complete dash, hvac,harness and ecm and engine harness at reasonable price
The hd will get more use if anyone needs a rust free 8ft bed or extended cab they are rust free and will be for sale
Still available
You've seen the new Silverado will have an available 2.7 liter turbocharged 4 cylinder?  IN A SILVERADO

My old stomping grounds.   The story caught my attention because the radio stations reports the fuel management doesn't only manage fuel to 8, 6 or 4 cylinders it also manages fuel to 17 cylinders :o

Well I had to investigate and learned that the engine manages 17 fuel patterns not cylinders.

GM got 300 million dollars from the GOVT to reprogram the computers! ;)

The new Silverado engines are powered by a "sophisticated controller that monitors every movement of the accelerator pedal and runs a complex sequence of calculations to determine how many cylinders are required to meet the driver's requested torque," GM said in its announcement today.


BTW: No mention of specific fuel mileage increase.
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