16
questions

I am experiencing a high idle problem with my 1998 GMC Envoy (Jimmy). It idles between 1500 and 2000. It is throwing the P0102 code, mass air flow sensor. I changed the mass sensor with no change. I then cleaned the throttle body and change the idle control valve, still no change in idle.I checked for vacuum leaks and found none. Replaced the throttle position sensor and still no change. I replaced the upper and lower intake manifold gaskets and still no change. What could possibly be causing this high idle problem??

My truck started to overheat, someone told me I needed antifreeze so after adding antifreeze it started to leak from underneath on driver side of vehicle. Why is that? Will it affect me driving?

JUST STARTED,WENT TO THE STORE AND PARKED. CAME OUT STARTED IT AND WOULDN'T SHIFT PLAYED AROUND WITH IT AND GOT IT TO SHIFT. BROUGHT IT HOME AND PARKED. TRYED TO SHIFT IT OUT OF PARK AGAIN. SHIFT LEVER WOULD NOT SHIFT OUT OF PARK. DIDN'T TRY TO FORCE IT. IT IS A AUTOMATIC FLOOR SHIFT. OTHER GEARS SEEM TO BE WORKING FINE. JUST CAN'T GET IT OUT OF PARK. WAS TOLD IT COULD BE A SILONOID UNDER THE DASH AROUND THE BRAKE PEDDLE. (CAN'T FIND IT).

My vehicle has fuel, will crank but not start. I hear the fuel pump kick in when I turn the key. Had the battery checked and ruled out. Is it the fuel filter or fuel pump?

one thing tho it is always throwing hot air no matter what! there is no owners manual to it so i'm lookin for suggestions. also does anyone else have trouble with thier gas gage alll the time? what maybe causing that? thanks for the answer!

i have a jerking feeling at 2000rpm and a random misfire codes #2 and a 1890 transfer case code I've replaced plugs,wires,rotor,cap,coil,air filter what is going on

I have an anti-freeze leakage that seems to be coming from the top of the engine near the carburator and runs down the back side of the engine. I can't see where it's coming from. What could be causing this leak? Engine is a 4.3- liter

my 1998 rear air compresser stays on and my service engine light stays on how do get the rear air compresser off and light

my 98 envoy occasionally makes a grinding noise from the front of the car i was wondering what that could be?

where is the oil pressure switch located on the 1998 gmc envoy

where can i locate the oil pressure switch?

what is the normal pressure of gas fuel coming out of tank

how hard is it to install

my built-in air compressor doesn;t work and i want to know where it is and see if i can fix it if there is a manual that would be great or pictures would do it too