20 Most Recent 2002 GMC Safari - Page 7 Questions & Answers

Think Mass airflow meter. It needs cleaning. Just don't use any spray cleaner. Severe damage will result. Look for a spray cleaner that is made specifically for the job. Check the cam position sensor too.

have you checked crankshaft position sensor? located on side of the harmonic balancer (crankshaft pulley), unclip wiring harness on sensor and use 8mm socket to remove bolt holding it in place.

Code 404 means there is a problem with the EGR valve, possibly that the valve is open when it should be closed.

Sounds like a rod bearing knock.

if its an electric window the motor maybe bad or the power/ground through the switch is not going to the motor.

Check your fuses

try wiring it so it is key on hot

should be a diagram in engine compartment

If the actuator is working (You hear a "click" when you turn the key or push the button), one of the rods may have come disconnected from either the actuator or the latch. You will have to remove the upper door interior panel to gain access to these parts. If you are VERY careful, you may be able to remove it without damaging it, but you may end up having to get a replacement panel (Try your local salvage yard). The rods come from the factory with a plastic clip holding them into the socket. These deteriorate over time and allow the rod to pop out when the hatch is closed (Especially if it is slammed). Once you have the door open, you can reconnect the rod using a clip like the one pictured below, or by using a piece of "safety" wire attached through existing hole in the door panel to keep the rod in place. Hope this helps!

This could be caused by a multitude of things. Is the check engine light on? Check the evaporative system for a vacuum leaks, the unit is on the drivers side under the van, to the left of gas tank. These vans also have a lot of problems with the distributor cap. When was the last time it was changed? Is there black smoke when starting the unit? If so it may be your pressure regulator or fuel lines going to the injector, or an injector itself is leaking.

did you check for a crank signal from the crankshaft sensor? the sensor is located near the balancer on the front of the engine.

Go to a Pep Boys and get a Hanes manual for that year vehicle.This manual will tell you everything you need to know about EVERTHING to do with whatever you need to know about your vehicle.Hanes pulls vehicles apart,every nut,bolt and clip,taking pix and explaining what they do.Then how to put back together and set.This would be easier than ME explain the procedure here.Have fun.

Your thermostat may be stuck in the open position. The original thermostat is a 195 degree. Your engine should be warm enough to blow heat in 5 minutes of idling or driving.

there is a bad connection on fan speed switch remove and check for a melted connector.

You may need a mechanic. At least a shop manual. The catalytic converter code means the computer does not think the cat is working right based on input from the O2 sensors. That data would need to be checked out and verified along with a temp scan of the cat itself. The other two codes are saying the signal from the pressure sensor is too high and too low. The computer measures pressure inside the gas tank to make sure it vents correctly. The pressure sensor could be faulty, or it could be something else in the venting system.

Pull the oil pan off