20 Most Recent 2002 GMC Envoy - Page 6 Questions & Answers

Ignition module is in the limp in mode. It has to be replaced.

Huge vacuum leak

Mass airflow meter is intermittent.

Look in your owners manual. There is a list in it.

What is the outside air temperature when it locks up? Summer temperatures will cause it to lock up much sooner which is normal. If this is not the case you can get a replacement fan clutch at any auto parts store

If it won't go into gear with the gearshift lever, then the transmission needs an overhaul.

Rear fan relay is stuck. Replace the relay.

Run a diagnostic test to see what codes come up and go from there.

Inside the oil pan. It is driven from the cam gear.

Terry, could be shift solenoids sticking or faulty, take into a good shop for diagnoses and estimate on repair. Check the attached links,instruction and guides, Good luck "I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info." http://forums.trailvoy.com/archive/index.php/t-82707.html Transmission Solenoid Symptoms Replacement Cost 30 Common 4L60E Transmission Problems Repair Charlotte NC

it's not the key fob got to reprogram with remote

originally i had coes 1515 and 1516 with a no start condition. i now only have a 1515. i have checked all wiring and all is good. all reference v are correct and i am stuck because i am having no luck finding diag for this. Any help would be much appeciated.

Edward, may just be a leaking valve cover gasket, have a good tech. have a look and estimate repair. "I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."

When the engine sounds like an airplane, the most common problem is your fan clutch. It's not dis-engaging, all of us have had that problem OR will at some point with this vehicle platform. Replace the fan clutch.

JUST OPEN THE BATT. POSTES AND INSTALL THEM AGAIN

I wouldn't drive the vehicle till you find out what is wrong. Have you ever changed the oil and filter, plus, overall tune-up? Is this high-mileage engine? You could use an analog gage in place of the oil pressure sending unit, just to double check the gage. If no oil pressure, could be the oil pump? If this is a high-mileage engine replacing the oil pump may not help. You may need an engine overhaul. Do you have any cylinder compression? Because that knocking, hope you don't have internal engine damage?

Could need an engine rebuild you cannot drive without oil and not do damage to the bearings.

your split air control valve is stuck