the temperature gauge shows 260 degrees but engine is not hot, AC starts out cool then goes hot, exterior temp will say it is 50 when it is 90, the mirrors work sometimes, loud roaring like a big truck or a plane taking off (mechanic says that is fan clutch). Took vehicle to parts store and had diagnostics done. Showed several codes and the employee said it probably needed to be upgraded computer. How much to have it reprogrammed? Is this a recall?

Blower only works when I don't need it :/ Doesn't always kick on. Checked relay. Don't know what else to check.

Electrical? Also wiggled connection to no avail. Might be having electrical a/c problems too.

What will happen if I do not get fan clutch replaced? How does it effect my Envoy other than being having a loud engine? Am I safe to drive it as is? Does that have anything to do with the AC blowing hot air? Trying to research as much as I can. My husband is a disabled Veteran and this is the vehicle that is equipped for his disabilities. Any advice appreciated

engine decellerated suddenly e driving. the harder i stepped on gas the higher engine revs and no pickup. had to stop turn off engine wait a few minutes and start up. went into drive for a ew miles and then the same decelleration. when idle engine runs smoothe but won't pick up on acelleration. what can i do? fear is transmission failing.

I had the front differential repaired. Ever since then my Envoy sounds like the transmission is not right. When I first start out it sounds like it is straining and it changes gears differently. Oh, the shop also replaced the front axle at the same time as the differential. Is there a way I could check the transmission fluid and if it is not low, what should I do next? I cannot afford another 600 dollars this month.

When stuck in traffic and not moving with temps in the 90's, the engine over heats because the electro-viscus clutch will not spool up even with the engine revved up. This clutch has been replaced twice by an independent shop. The last clutch had the same part number as the GM oem part. I have no problem in ordinary city traffic; only when stuck on the interstate for 20 minutes or longer. Is there a kit available that replaces this clutch with a thermostically controlled electric fan? Is there any other solution to the problem? I was told be one tech that I will have to buy a replacement clutch from a GM dealer at a cost of $700 or$800.

some time it will and sometime it will not

Ok when my ac is on my check engine light flashes and it don't want to accelerate and jerks and I had auto zone check it for me it said number 2 cylinder but why does it only do it when my ac is on and is it ok to drive please help thank u

started knocking when cold weather hit--i bought it used in oct.2014

just the curved pipe from the muffler to tip. what should this cost to replace?

Two lights are on constantly on my dash the are all the way on the left,one is a triangle light which looks like a skid mark warning and the other is right next to it looks like a truck tilt sign I can't get an answer from my mechanic but I would like to find out how to get them to go off.

I swapped out the fan relay with high low beam relay. Could it be the cooling sensor switch?

fan will turn while your cranking engine. Stops when engine starts.

the problem started about 30 mins. ago

The engine began developing a vibration at idle speed, especially while in gear. The Check Engine light is on and the only code that shows is a misfire in cylinder 5. Further diagnosis shows that cylinder's compression is 65 psi. I've had estimates of $2,000- $2,500 to fix the problem. The mechanics seem pretty sure the low compression is a valve issue. I love the vehicle, but am not sure I want to risk the repair. If I have to replace the head, how expensive is that?

Something is broke in the door latch can I get the panel off with the door with the door closed.

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??