2002 GMC Safari - Answered Questions & Fixed issues

Are you getting spark to the plugs?

David it sounds like maybe you might have had your ECU go bad, but I'm not sure.

No , no joke ! a leaking gas cap can cause a code for the evaporative emissions system and turn on the check engine light . This EVAP system stores fuel vapors in a charcoal canister that the PCM - engine computer will purge at certain times . But that doesn't happen that much . Most of the time it is other componets That cause the leak ! Plus there are other thing's that will turn on the serviced engine soon light ! Your vehicle can set hundreds of DTC'S - diagnostic trouble codes . If the light is on there has to be codes stored or a problem with the instrument cluster . Your best bet take it to the dealer ! Wells EVAP Training with Sgt Tech P0440 P0441 P0442 etc

If you have a traction control light on or an abs light on the all wheel drive won't work right. All the wheel sensors and speed sensors have to work right.

FOR ONE THING CHANGE MECHANICS ! HE SHOULD HAVE FIXED THE PROBLEM, YOU MAY HAVE A SERIOUS BRAKE ISSUE ! IF LIGHT IS ON IT WILL NOT PASS INSPECTION ! YOU MAY HAVE AIR IN SYSTEM, NEEDS BLEED ! FLUID COULD BE CONTAMINATED , NEEDS BLEED OUT, REPLACED W/ FRESH FLUID ! ABS REQUIRES THAT THE REAR BRAKE CIRCUIT OPERATES BEFORE THE FRONT BRAKES, THIS PREVENTS SKIDDING, THE PURPOSE OF ABS BRAKES, CORRECT ? MASTER CYLINDER HAS SEALS, CONTAMINATED FLUID AFFECTS SEALS, BRAKE LIGHT WILL STAY ON UNTIL PROBLEM IS RESOLVED !!! REAR BRAKES IF SHOES NEED ADJUSTED, CLOSER TO DRUM ! THIS WILL HELP, BUT BLEEDING OUT ALL BAD FLUID & AIR IN SYSTEM IS PARAMOUNT !!!!!! BRAKE LIGHT SWITCH MAY NEED REPLACED, PROPORTIONING VALVE WHICH SEPARATES FRONT FROM REAR BRAKES , IS OUT OF BALANCE, THE VALVE NEEDS TO BE @ A NEUTRAL OR CENTERED POSITION, COULD BE STUCK TOWARD EITHER BRAKE CIRCUIT, MORE FRONT THAN REAR, UNDERSTAND ? THINK I COVERED YOUR ISSUE, PLEASE RATE MAY ANSWER ! THANKYOU,

the coil packs are bad,start it at night and open the hood and look for sparks

If it is a V6 fuel injected then either your injector heads and fuel lines may be clogged, go by a container of cleaning fluid for your injector heads, not the one for fuel lines. The one for injector heads will clean both. just pour it into your gas tank and let it sit for five mins then start your vehicle and run for five more mins. Let me know if this solves your problem.

Why bother buying something with a problem?Get the owner to take it with you to a transmission shop and get their take on it and potential cost. Then get that knocked off the price if you really really want to buy it. My advice is that there are thousands out there, why buy a dog?

Could cost between $1400-$1800

If you open up the hood you will notice that there is a screw holding in the lens from the top. After you take that screw out there should be a sliding lock mechanism on either side of the lens. Pull those up and it will release the whole lens. Pull it out, replace the light and then put the lens back in.

Have you tested the fuel pump relay circuit ?

Multi-Diag Access J2534 has the function for air condition, such as Diagnosis of cooling electronic,Reading settings cooling circuit,Test servo actuatorshttp://www.careucar.com/wholesale/[email protected]

sounds like your cv joint is worn out if its front wheels

open the hood and check for leak on any plastic vacuum lines.

There should also be another fuse panel on the interior located on the driver or passenger side foot panels or there about.

I would check for broken wire/wires in the heavy rubber boot that flex's everytime you open and close the door. at frt. of door all the wires run through it to door from cowl. very common problem on both sides

Here is the definition of the code.P0101 GMC Description The Mass Air Flow (MAF) sensor is placed in the stream of intake air. It measures the intake flow rate by measuring a part of the entire intake flow. It consists of a hot film that is supplied with electric current from the Engine Control Module (ECM).The temperature of the hot film is controlled by the ECM acertain amount. The heat generated by the hot film is reduced as the intake air flows around it. The more air, the greater the heat loss. Therefore, the ECM must supply more electric current to maintain the temperature of the hot film as air flow increases. The ECM detects the air flow by means of this current change. Faulty mass air flow sensor- Intake air leaks- Dirty mass air flow sensor- Dirty air filter- Mass air flow sensor harness is open or shorted- Mass air flow sensor electrical circuit poor connectionRead more: http://engine-codes.com/p0101_gmc.html#ixzz223ibNx6tRead more: http://engine-codes.com/p0101_gmc.html#ixzz223i9HR3J

You need fuel, spark at the right time, and compression for the engine to run.You'll have to figure out if it is a fuel or ignition problem if the compression is ok.The list includes low fuel pressure, cap-rotor-wires, spark plugs, coil, ignition module, various relays and fuses, and the computer.Even the key switch could be faulty.I would check for trouble codes first.

You'll need a 12mm wrench or 12mm socket wrench.

Could be one of two things, maybe both, either the water pump isn't doing it's job right, or the radiator is clogged. In either case, it should be replaced.