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About Van
Expertise
I can answer most questions concerning 4X4 engine, drive line, suspension, electrical, and fuel, both diesel and gasoline. Ford, GM, and Dodge, old and new.

Experience
I have been maintaining a fleet of approximately 55 light, medium and heavy vehicles for over 20 years. Most are 4X4 pickups and off road fire fighting trucks.

 
   

You are here:  Experts > Autos > Trucks > Truck Repair > 1995 gmc 6.5turbo no start

Truck Repair - 1995 gmc 6.5turbo no start


Expert: Van - 9/5/2007

Question
hi, i am actually a mechanic, but this truck has stumped me.my truck has no codes,but all the scan data is no good,it shows with the key on,engine off, throttle position 20%,rpm698,coolant temp on scanner is 151,even if you unplug the sensor it stays the same.I have tried many things such as new standard computer,oil pressure switch,driver moduel,gas pedal, and fuel pump relay. i have check all grounds, and all the wiring going in and out of the computer.I even unplugged the main harness at the engine, and no numbers changed on the scanner what so ever.

Answer
Hi Jeff,
I don't know about the code scanner...I would surely check the ECM fuse, as well as the others.

I have had to get the injector pump replaced for dying, but they increased the warranty to 10 years, 100,000 miles at that time, so it was free. I'd at least ask about it.

There is also known problems with the FSD which is the Fuel Solenoid Driver overheating. Look at this search. http://www.google.com/search?hl=en&q=GM+6.5+diesel+driver

Van

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