1994 GMC Sierra - Page 4 - Answered Questions & Fixed issues

Check the fuel filter. It might not be a bad idea to do a tune up.

alternator overheating airflow

Problem solved! Clockspring was not the culprit. Four insulating plastic washers of particular shape for airbag brackets deteriorated - I should say crumbled. Consequently, airbag sagged and contacted the horn grounding point. It was a difficult problem to diagnose without prior experience. Since dealer doesn't sell the washers separately, I had to either fabricate them or purchase the entire steering assembly for $100. I took the first route. It took me a day.

Hyundai uses a special type of fluid in their power steering units! Make sure your getting the right stuff!

Have the misfire diagnosed and the backfiring will be fixed also. The backfiring is caused by the "over-rich" fuel mixture in the exhaust stream and is igniting within the exhaust. Fix the misfire (which will cause the rich condition) and the backfire will be gone.

is the truck working on 4x4 high? you can jack the truck to have the four wheels off the ground and check if the front driveshaft is rotating while the 4x4 low is engaged

it is located on the hosing for the thermostat. Disconnect the electric plug unscrew it and screw the new one in and connect the electrical plug

Needs a new thermostat or heater core

Driver's side cylinder head for the guage. The other one is for the computer it's next to the thermostat housing. Guage has 1 wire computer has 2 wires

run fault codes and replace faulty sensors. Check that the cat converter is ok and not cracked and blocking the exhaust pipe.

First question, does your truck have cruise control? If so, find the cable that goes from the cruise module to the throttle body, and disconnect the cable and see if that solves your problem. Next thing is inspect the throttle cable, from the gas pedal through the firewall to the throttle body, and look for any kinks, anything contacting the cable or linkage.

check for vacuum leak in the engine bay.

You will need a timing light for Hi energy ignition as well as standard socket set or wrenches. 1. get the engine up to operating temp. 2 shut off engine connect the timing light to the number one[1] spark plug wire at the spark plug end connect battery connectors. 3 start engine and note location of pointer on the mark tab on the timing cover. 4 shut off engine loosen the hold down clamp on the distributor turn the bolt no more than one full turn[snug is better than loose here] then note the position of the dist. cap. Move the dist. to make sure it moves freely replace back to the starting position and remove and plug the vaccum line to the dist. 5 start engine and set timing to the desired spec. 6 shut off engine tighten dist. clamp bolt 7 start engine check timing one more time to see if still there at desired setting. 8 shut off engine dis-connect all tools and light

check fuses? make sure no foreign objects in cig. lighter....

check the fuses-that the first place to check with electrical problems- Denny

Automatic or standard? If standard, clutch is worn out. If automatic, the regulator valve is worn out.

You can\'t. GM did away with timing light based ignition timing on the vortec engine family. You can adjust the distributor, but it adjusts something called Camshaft Retard Offset, and can only be read using a scan tool. The only reason you would need to check the camshaft retard offset is if you removed the distributor or intake manifold and accidentally got the distributor off a tooth or two.

I'd guess that you need a new ignition key cylinder.

IS THERE A KEY RELEASE SWITCH OR BUTTON ON THE STEERING WHEEL ANYWHERE IF NOT THE SWITCH ITSELF COULD BE LOCKED UP

Use heat shrink to repair the cut wiers