1994 GMC Sonoma - Answered Questions & Fixed issues

Service Manuals https://www.google.com/search?q=1994+GMC+Sonoma+4.3+service+manual How to Change A Heater Core on a 1994 GMC Jimmy, (Chevy ...

Edited the question for clarity and the correct name of the model! It is worth a try. Back of the engine to the transmission should be the same. Others have done engine swaps in the link. https://www.google.com/search?q=will+a+engine+from+a+94+sonoma+rwd+swap+with+a+94+sonoma+4wd ..

Check bulbs first / fuse / backup switch/neutral safety switch.

No spark to the spark plugs or no fuel pressure . If the the starter spins the engine over fast enough it's not the battery . Doesn't sound like you know a whole lot about car's . Do yourself a favor an take it to a qualified repair shop . Before you buy alot of unneeded parts .

Fuel pump relay shorted?

It's not adjustable.

94 GMC Sonoma have fuel and fire but will not start replace rotor and spark plugs still will not fire and new feul filter and filter under can still no start any suggestions

Car Won Start Copyright AA1CarYOU TRY TO START YOUR CAR BUT IT WON...

If the drive house on the starter is cast iron it for a standard tranns and will not line up.Because the bell housings on automatic transmission is different.

is this when car is moving or just standing still and revving ? either way i would get it looked at ASAP as grinding noises aren't good and you could have serious damage , may just be a drive belt bearing or something much worse , would need to actually see vehicle to be more precise so get it to a mechanic

Oil in the coolant is usually an intake manifold gasket problem on these engines. If a head gasket failure the engine will normally overheat and give erratic temp guage readings. Make sure the oil level is full. Is the rattle noise coming from the engine? Some times the exhaust (converter) will fail and the catylist will seperate causing a rattle noise from the exhaust and plug it up giving a no power situation

Give this a shot make sure that the ground wire that connects to the engine and the fire wall did not burn into. If it did it will not charge may sound dumb but the engine must be grounded for the alternater to charge.

Depends on the connector configuration. If the connectors are the same, it should work but the tach won't.

The OEM ball joint is riveted into the upper control arm. There are two possible ways to replace the joint. You can purchase the entire upper control arm/ball joint assembly, which comes complete with the upper control arm bushings. This part costs about $150.00. You will also have to deal with the coil spring when replacing it this way. You can also buy just the ball joint for about $30.00. This will require that you drill out the rivets of the original ball joint and then bolt in the replacement with the bolts that are provided with it. The 2WD and 4WD versions are the same. See this link. http://www.autozone.com/suspension-steering-tire-and-wheel/ball-joint-upper/gmc/sonoma-4wd/1994/6-cylinders-z-4-3l-tbi

yea, if it's pressed in it may be cheaper to just get the whole upper control arm

when vehicles get this old and maybe there fluids havent been kept perfect over the years then yes due to sedaments in the cooliing fluid the heat core tends not to get as hot as it did when new , you can try a coolant flush , run heater while proforming a "hot" flush but do use all the normal precausions when dealing with hot engines

Check in main fuse block with other relays. Should be labeled. Relay kicking out may be caused by overheating = bad fuel pump or dirty filter. Test fuel pressure too.

Could be a dropped valve, seized piston, seized rod or main bearing, so lots of possibilities.

NO THIS TRANS DOES NOT HAVE A VACUM MODULE, IT IS COMPUTER CONTROLED