20 Most Recent 1994 GMC Yukon Questions & Answers

I hope I can help you with your question I believe I can first and foremost if you're having trouble starting your car on cold mornings it's probably going to be a clogged fuel filter or bad fuel pump about to go out you're having symptoms as you described and then whenever you're at 55° things start to warm up and you can start your car okay the filter is so clogged up imagine that look looking like a blood vessel okay when you have a clog in it it doesn't allow the blood to flow freely feel the same way

Check the MAP sensor connection/connector and either the seal where it plugs in the intake or vacuum hose connection .

Looks like it lost battery power. Check around the battery for loose or broken connections at both ends of the battery cables. There's one from the battery minus to the engine that could have broken. Hope this helps.

sounds like a blockage somewhere in fuel line try a fuel addative that clears fuel line and injectors etc follow the instructions on product

have the fault codes read and replace the faulty sensors. possible o2 sensors --water temp /air temp sensors.

Get a remanufactured ECM.

Put a timing light on it and see if the timing jumps arround if so you chain could be bad. You should also put a fuel pressure gauge on it and see what you have for pressure,

• well you need TO CHECK IT AND GO TO AUTO ZONE ...

Bad headlight switch.

bad plug or wire

Either it will just click when you turn the key or a fast spinning sound of it turning the gear but it does not engage the flywheel.

This could be 1 of 2 things 1 being the heater control valve and the other is the heater core is clogged up.