Question about 1994 GMC Sierra

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94 GMC truck diesel starts,runs and then dies and will not start

I need to know if it could be the fuel pump and if so..where is the fuel pump located on this particular model. gmc 1994 3/4 ton sierra diesel 6.5 deisel truck

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I have the same problem and have trouble codes 35 and 36. I found out that there is a computer module that needs replaced as it sits low in a valley and gets hot and seperates. I am reseaching about the a/m fix that installs the new module away from heat.

Posted on Mar 12, 2009

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Also, check all starter fuses, iginition fuses and relays.

Q: Does the engine turn over?

Q: Does the engine start, then die, or just turn over?

Q: If it turns over, does it sound weak, or does it sound strong, like it's trying to start?

Q: Have you tired jump starting the truck? If not try this: if it starts and stays running, pull both battery terminals off. If the truck dies, replace the alternator. If it stays running, you may need to replace the battery. Look at the battery and see if there is a date sticker on it to indicate when the battery was purchased (or manufactured). (If diesel, have both batteries tested). If diesel, if jumpstarting from one battery doesn't work try the other one. Also, if diesel, make sure there is at least 1/4 tank of fuel as some diesels won't start if very low on fuel (pump does not reach very bottom of tank and will not syphin fuel in).

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Please let me know if you need further assistance.

carsandcomps,

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