GMC Envoy owners have reported 14 problems related to automatic transmission control module (under the power train category). The most recently reported issues are listed below.
Stop engine/low oil pressure display continually comes on and while driving, the vehicle hesitates and at times will stall. After replacing pcm, oil sending unit, throttle body assembly, cleaning the pcv valve and map sensor and multiple other parts, I was told that the dealership did not know what it was and stated that they could replace the cam shaft actuator (for a cost of approx. $885), but they could not guarantee that would resolve the problem. I have taken my vehicle back to the same dealership from 02/14/2011 until 11/07/12 and still unable to fix the problem. I've filed a complaint with GMC manufacturer, but still have not been able to resolve my issues.
See all problems of the 2002 GMC Envoy.
I was driving home from the beach (sandy hook national park, NJ) when my service engine soon light came on. I used on star to remote diagnose the code, and was told it was an error in my transmission control module. I immediately called my nearest service center who inspected my truck and informed me that it was my transmission lines that had just simply 'corroded' and that my transmission has almost been running on no fluid. This was shocking considering I maintain good care of my 2002 Envoy and had seen no sign of leaking transmission fluid but was informed it was somehow all over the bottom of my truck. They were able to fix the lines for a cost of 690 dollars, but I still feel that something is not quite right with this situation and have talked to others with similar issues.
Vehicle goes into reduced engine power mode unexpectedly while driving with no prior warning. Mil light turns on, reduced engine power light turns on, stabilitrak off dic message displays, results in loss of acceleration and requires the driver to immediately take emergency safety actions. Codes include p2135, p0121, and p060e. Issue is intermittent, appears more frequently in cold or wet conditions. The issue has occurred more than 10 times since the initial incident. Dealer unable to correct the issue by throttle body cleaning and pcm replacement. Latest attempt is to replace the throttle body.
See all problems of the 2006 GMC Envoy.
While driving down the highway, my GMC Envoy xl shuddered then stalled. The ses light and reduced power light came on causing an extreme safety hazard as we were on a highway (speed limit 65 mph). The dealer, regal automotive in lakeland stated that the computer that controls the drive train lost contact with the vehicle. They informed us that this is a common problem with the Envoy and that they have a service bulletin for a program update. However, no recall have been issued.
See all problems of the 2004 GMC Envoy.
Continued electrical problems with 2002 GMC Envoy. Such as on-star telephone along with radio/cd player, all four doors failing to lock or open including the back hatch. Service air bag light and engine check lights coming on. Reprogram engine/transmission module, also telephone antenna replaced, short in wiring located due to rubbing/pinching during construction, replaced wiring harness. Hundreds of dollars required to identify short in wiring. Transmission operates sluggish until warmed-up vehicle feels as if the brakes are on until it has moved several blocks.
While driving at 35-40 mph vehicle suddenly lost power and the steering was not operating . There was no response to the vehicle at all. This occurred in the middle of traffic of a major highway. Vehicle had to be towed to a dealership. A diagnostic test was done and the result showed the need to do an update of software for the transmission control module ( ecm) and the power train, in general. They performed the repairs. The vehicle was serviced the week before this occurred.
See all problems of the 2003 GMC Envoy.
While driving at 65 mph engine shuts off; would not restart first try. Would start a little later. Went to dealer, reprogrammed pcm with latest calibration update. Second time happened at 70 mph.
2004 GMC Envoy developed the following problems: vehicle stalled, turn signals stopped working, blower fan stopped working, and the srs light remains lit. The turn siganls stopped working due to a short in the flasher. The powertrain control module was replaced due to the ses light iluminating. The blower motor fan failed 4 times due to a short in the wires and control head. The vehicle overheated, but the problem could not be diagnosed. The lcd displays, knobs become extremly hot after hours of driving.
Consumer states the vehicle will slip out of overdrive and into first gear, which results in the vehicle losing power. There is a warning light that will come on which will read reduce engine speed, the dealer replaced the pcm/vcm but this did not correct the problem, front end squeaks when turning and driving, . Mr.
Vehicle was traveling a 65mph with no visible signs of trouble. The vehicle's pcm failed and the vehicle coasted to a stop and would not start. The pcm was replaced by the dealer and reprogrammed.
Traction malfunctioned, causing rear wheels to lock up and resulting in vehicle spining which coyld have resulted in a crash. Dealer could not determine cause. Problem still exists. Please provide further information.
See all problems of the 1998 GMC Envoy.
There is a malfunction in consumer GMC Envoy power train control module resulting in failure to accelerate.
Consumer states while comiing down a hill pcm shorted out. As a result, driver lost all electrical functions. Steering wheel got really stiff. Brake pedal became hard to press.
|Problem Category||Number of Problems|
|Automatic Transmission problems||
|Transfer Case problems||
|Power Train problems||
|Transmission Failure problems||
|Automatic Transmission Control Module problems||
|Differential Unit problems||
|Transmission Noise problems||
|Noises During Shifting problems||
|Automatic Transmission Cooler problems||