1992 GMC Sierra - Answered Questions & Fixed issues

the Fuel Pump relay and fuse is under the plastic cover under the hood at the firewall on the passengers side.

Ground wire is usually. Black .

When the problem is ongoing, if it cranks good, have a helper crank it while you check for spark at the plugs, if everything is hot, wear gloves. Check proper fuel pressure and fuel injector pulse. I'm especially interested in the fuel injector pulse. If your losing rpm signal, there will be no fuel injector pulse. How long since overall tune-up? Any applicable trouble codes? Your obd1 so checking trouble codes should be easy, as long as your mil lamp works. There may not be any codes, I don't know? I can only help with testing, you have to do the testing.

you need to pressure bleed the system, or you can fill the brake system to over fill as it needs to be over the pipe for the clutch line. and keep it there and pump and bleed the line, but before pumping undo the bleed screw and put bowl uner to catch fluwid and fill the line up till it runs out clear with no bubbles. then tighten the bleed screw. then fill up and pump pedal, the re bleed. should be done then, pressure kit doe this all in one just hold clutch down and undo the bleed screw let air out etc then tighten up. and its done. used for doing the breaks as well.

Post your code s here and I can look them up in my service manuals .

To start, take the vehicle to a dealer and ask them to screw an oil pressure gauge into the block hole and check your oil pressure whilst idling and while driving it. I have a 1993 and it does the same thing, but the problem is only the gauge itself. If it is actually having such oil pressure fluctuations, you may have a defective pump, a clogged pump filter screen, or a clogged oil filter. God bless your efforts.

Assuming you are correct, then the only two things still needed are air and compression. As long as the air filter and air intake is not completely clogged, you have air. Perform a compression test to ensure that there is sufficient compression to support combustion.

You should be able to look down the throttle body and see into the air bypass chamber that the IAC uses to divert air around the throttle blade. Look to see if the pintle is all the way out closing off the flow of air. When you turn the key on you should see the pintle move back and allow air to move through. If the pintle is not moving that it may be stuck in the bore. Especially if there is a lot of carbon build up in that passage. I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Remove inside door panel loosen bolts holding glass to track pull out on angle reverse to reinstall.

Sounds like you need a new battery, but just in case take the battery to a place like Autozone or another car part place and get them to test it. It's usually free to test.

no you don`t. just use the proper tool to get access to the switch.

remove the inner door panel then disconnect the arms that run from the outside door handle, the inner door handle, the door lock mechanism, from each unit. then undo the 3 bolts/screws on the end of the door to remove the door latch assembly.

Try pushing the button repetedly wal drivering It likey will start working again Dust or else is binding the plastic gears

that is what it does, it senses the amount of air flow to engine, clean filter, it may be a simple as that

Check for a blown fuse. Replace fuse. If it blows the fuse right away, then you have something shorting out the circuit. Fuse panel is probably located under the dash board, to the left of the steering column. IF you're using the cigarette lighter as an actual lighter and not as a 12 volt plug for a phone charger, THEN I would suspect the heating element of the lighter itself. Hope this helps.

u can try to pour some oil in the spark plug holes and let it set for a couple days to see if rings r stuck if its bottom end that is causing the lock up then its a done deal rebuild or replace motor

Check Coils no spark is almost alway because of Bad Coil or COILS! more than likely you have a coil pack and they are usely 6 of them one could be bad or all six could be bad most of the time it is just ONE Not always though i have seen them all go out Rare but posable

Depends if its electric locks/windows or not. You can go to any auto audio installer shop and they can pull it for you in less than 5 minutes. They will do it right in front of you and probably wont cost anything to very little.

All power windows quite working at once ?? If you need further help, reach me via phone at https://www.6ya.com/expert/ralph_2f0886b7d6af32ce

Manual transmission ?? Noise coming from Engine ?? Transmission ?? These rigs are notorious for crankshaft main bearing issues.....Does the engine crankshaft have excessive end play ?? If you need further help, reach me via phone at https://www.6ya.com/expert/ralph_2f0886b7d6af32ce