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Comments
If you would like for us to check into this further for you, please forward the last 8 digits of your VIN or your Service Request number to us via email at socialmedia@gm.com
Sarah, GM Customer Service
I would not recommend a GMC to anyone anymore. I'm so unbelievably frustrated, just like MANY MANY people I'm reading about. Something needs to be done.
We're truly sorry to hear that you're frustrated, and can understand why as you state you've been back to the dealership several times this year for the same concern. If we can check into this further with you, please email us at socialmedia@gm.com with more information (include your name and contact information, a summary of the situation, the last 8 digits of your VIN and mileage, and the name of your dealership).
Sarah, GM Customer Service
Do you have any inclement weather that could be affecting the operation of your window (snow/ice)?
Sarah, GM Customer Service
This is my 2nd Envoy, I had a 2002 Envoy SLE which did not have as many issues has this top model.
After reading all of these posts, I do not understand why there hasn't been some kind of customer service recall. On the brand model's top trim/package, these are not issues those of us who are loyal to the GMC brand should have to pay for on such a large scale.
P0300 - Engine Misfire Detected
P0171 - Fuel Trim System Lean Bank 1
I've read about 100+ posts on this site on what to do about the code, and I've compiled a lengthy list of things to check (if you want the list, PM me and I'll send it to you).
Here's what I've done:
- 3 years ago, about 100,000 miles, replaced the fuel filter
- oil changes every 5-7k
This past weekend (6/22):
- checked air hose from filter to throttle body, no cracks found
- replaced the spark plugs with AC Delco Irridiums (part 41-110 from Advanced Auto Parts); broke one wire along the way, replaced only that 1 wire
- cleaned throttle body (didn't remove it, but used a cloth first, then used throttle body cleaner spray)
- inspected MAF but no clue if it's malfunctioning (looked clean though, wires looked good)
- looked for an EGR valve, it doesn't sem to exist
Here's the weird thing on the plugs: In cylinders 1,3,5,7, all 4 of the plugs were black and slightly wet (probably gas). In cylinders 2,4,6,8, all 4 of the plugs were white and chalky.
Could this be an O2 sensor on the driver's side? It seems the misfire isn't as random since it appears to be isolated to cylinders 1,3,5,7...any opinions on what could be causing these misfires and likely resulting in the engine running too lean in bank 1?
Sam
P.S. - I can't figure out how to upload an image of the plugs (but they are as described in this post).
2: turn the ignition Key to the ON position
3: Press the rear glass control switch vent button 6 times 4: Turn the ignition key to the OFF position
5: Press the rear glass control switch vent button 6 more times
6: turn the ignition to the ON position. at this point the rear window will move up and down approximately 20mm (0.8 in). this movement signifies that the rear window glass motor has entered into the initialization mode
7: NOTE: the rear window glass control switch must be held in the UP or DOWN position until the window glass stops moving. failure to hold the switch will end the initialization operation. then the initialization will have to be re-started.
Hold the rear window glass control switch in the full UP position until the rear window glass stops in the full up position
2. My 2002 GMC Envoy XL has had problems starting. My wife (who normally drives this) gave it up for dead but I was able to start it after 4 attempts. Each time it also makes a strange cranking sound. My wife said she saw the windshield wiper spray on each of her attempts to start it. I am going to drive it around and hope the problem goes away (left the engine running right now!). What could the cause of this be??