20 Most Recent 1993 GMC G2500 Questions & Answers

either under the hood or under the dash

recheck filter is in correctly ---also check for fuel pressure pump may hum but it also has a filter in tank [protects pump]that may be clogged --carboned up egr valve will cause stall with no start as well as clogged cat converter ,

Well, it sounds to me like you have replaced everything except the MOST LIKELY CAUSE of your problem. Now we're saving money!!!

Please read this article: What Else Could Be Wrong?

After you have done that, throw your Crankshaft Position Sensor away.

change fan clutch

You must have a leak or one of the lines are clogged. The reason it stays running when your on the gas is because it keeps the fuel pressure up. Then when it shuts off it loses all pressure in the line and the pump cant handle the initial start with the leak in the line.

I always use the stuff you squeez around bathtubs. It comes in different colors and is water proof. Just make sure you have a warm dry place to let it sit and dry after you apply it. Before you apply it though, make sure you take a putty knife or butter knife and clean the spots under the rubber on the windshield and get all the mold and guke off it. Hope it works out for you. The Raz

trun signal switch....multifunction switch(same) or headlight switch burnt on back

Are you sure it isn't P2146? If it is P2146 it is Injector-group A, supply Voltage-open circuit. Possible causes-Wiring, engine control (EC) relay, injector.

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GM has had problems with their fuel pumps. It is replaced as an assembly and runs around $250.00. You can check the fuse in the under hood fuse block to see if it is blown also there is a relay that can be switched with the horn relay to see if it is good. You might want to go ahead and replace the pigtail at the pump.

Good luck.

Try “autozone.com” or your local library for diagrams and step by step instructions and here is a place for the parts if needed: Schram auto and truck parts 1-800-292-1032 they sell only GM parts

Check all electric connections going to transmission as (od) is electrically activated. check the conections and entire wire path for damage. OD can be disengaged by slowing speed or slight tap of brake pedal so check disengage switch and wires on brake pedal. I hope this is helpful, please rate me

Could be many things. You can take the spark plug wires at the sprak plug end and check for spark with a tester or visually but you have to be careful so not to get shocked. With the ignition off, renove the wire at soark plug and with an old spark plug insert the plug into wire and make sure you rest the spark plug on a grounded metal surface of the engine bay and crank and look for spark. You can also measure the resistance on each spark plug wire with a multi meter.
Other causes can be weak compression this test will eliminate a lot of conditions like bad valves ir valve seats, rings etc. You can probably rent a comoression tester at autozone and just follow the correct procedure on how to test so u get a correct reading. If you create an account at autozones website you will have access to a lot of repair manuals. Good luck