Problems with 2002 GMC Envoy POWER TRAIN

Our 02 gmc envoy randomly shifts the transfer case into neutral while driving causing a no power situation in traffic. this has put my wife and child in danger on more than one occassion.

Pcm defect. *ak

On dec. 3, 2003, i took my 2002 envoy into the dealership because i was experiencing serious shifting issues. repeatedly my car would shift while i was driving between 2wd and 4 wd hi. the car would also would make chugging noises. furthermore, the vehicle shifted between gears on its own while i would be making sharp turns such as into a parking space. while in park, if i did not have my foot on the brake petal, the car would jump forward. the car almost jumped through a store front window. the dealer could find nothing wrong with my car. i told them to keep it another day, that there was something seriously wrong with the car. the dealer kept the car another day, and still found nothing. on december 31, 2003, i continued to experience the aforementioned problems. knowing that it was new year's eve and that the odds of there being any competent staff at the dealer was slim, i held onto my car and planned to take it to the dealer after the holiday. on january 3, 2003, i was driving and my car died for no reason. i was not accelerating nor braking. thank goodness the road i was on was not very busy as i would have created an accident. the situation was very dangerous and very frightening. i called roadside assistance to tow my car to the very dealer that could not find anything wrong with hopes that they would find something wrong. roadside assistance, by the way, told me i needed a flatbed truck to tow my truck to prevent damage as did the dealer. roadside assistance showed up without a flatbed - so i made them leave and bring back a truck with a flatbed. two hours later, my car was finally at the dealership. the dealer flat out told me "i don't know if we are going to find anything wrong with your car." apparently cars that stall in the middle of the road is perfectly acceptable for this dealership. the dealer told me he could not get me a rent-a-car for two days. the car is still at the dealership. *la

Transfer case: while driving at highway speed of about 65 mph with the transfer case swtich set to a4wd the trransfer switch without any input or operator control switched to 4hi (both the switch position and indicator light) and the 4lo indicator light was flashing amber indicating the transfer case was attempting to swtich into 4lo. this has occurred aproximately 6 times previously at various speeds, while driving striaght or conducting turning maneuvers; but only when the engine is warm. the latest incident on 12/28/2003 (prompting this complaint) occurred after the dealership completed the remedy specified by service bulletin 02-04-21-002a on 12/26/2003.*ak

Collapse of the right front lower axe. and the dislocation of the right wheel.*ak

I have had multiple electrical and transmission problems with my 2002 gmc envoy. yesterday my family and i were driving on interstate 80, while on cruise control, the suv shut off. i barely was able to get to the side of the road. i almost hit a vehicle getting off the highway since i lost power steering. after 15 minutes of not starting, it finally started. i took the vehicle to the dealership and they couldnt find anything. i have written many letters and tried to convince gmc that this suv is not safe.

My 2002 envoy exhibits the same symptoms as my previous gmc jimmy. it has a hesitation on acceleration that fails to shift from 1-2 properly. this only occurs when the car is cold and only for a mile or two. however , it causes severe loss of power and acceleration capability. obviously other people have this problem but it does not appear that there is a solution. it always works by the time it gets to the dealer, of course. *nlm

Complaint is for 2002 gmc envoy. on three occasions, this truck stalled out while in motion, the last time at 55 mph on an interstate highway. on three occasions, the transmission in this vehicle switched, of its own accord, from 2 wd to 4 wd (low) nearly casusing accidents on two occasions. i listed the most recent occurrences of these problems below.

Transmission does not work properly. have had it repaired twice, but still vibrates, and fails to move vehicle forward at times, from a dead stop. is very dangerous at intersections where moving quickly is imperative. also wiring problems which operate various remote instruments (mirrors, seats, etc.) fear of fire. rear door latch was replaced - clicks "locked/unlocked" while driving. seats move on their own while driving. *nlm

Transmission on cold start stays in first gear. left rear brake appear to have hung up and is burning. dt

Gmc envoy 2002 sle xl purchased in the month of june and started having problems in oct. the vehicle would shift in and out of 2wd and 4wd on it's own and on occasion it would lock the wheels also. problem mostly occured when making turns. stated problem to dealer (10/18/02) - dealer replaced 4wd selector switch (reason: internally shorted). had problem again in month of feb. '03. brought vehicle back to the same dealer and explained problem again (02/21/03). dealer replaced 4wd selector switch again. reason why i'm filing this complaint is because i feel this vehicle is not safe. i also realized that i'm not the only one experiencing these same problems. my hope is that gmc will take notice and correct this problem quickly.

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 *nlm *dt

Engine stalls for no apparent reason. i have contacted dealership and they can find nothing wrong. i advised them of a recall regarding the fuel system that may affected the problem. says they replaced the fuel filter. the first time i took it in, they said that it was the ignition switch. also transmission makes a very loud noise when attempting to take off at times. it sounds like an engine fan that will not go off. there is a major lost of power when this problem is occuring. i bought this car as a program car, with @ 11, 000 miles on it already. i've had problems with it from day one. i have only had it a few months. i am extremely irritated with this engine problem. this is extremely unsafe. dt

Consumer states when starting vehicle, vehicle shifts to 4 wheel drive. cause is unknown. please provide any further information.*jb

We purchased new vehicle october 2001 and within 4 months began experiencing problems beginning with a noise within the steering wheel. dealer technician replaced defective airbag module. the next month, my new envoy has been to the dealer 4 times for the same problem of 1) wind and/or whistling noise at speeds above 45mph, 2) "vibration" noise coming from transmission when vehicle reaches 3rd gear , 3) when vehicle has reached 3rd gear and previous noise begins, there is also a vibration felt in the acceleration pedal. on the first trip to dealer for these problems, technician only agreed with the wind noise. discovered the front side mirrors were the cause. replaced both mirrors---problem still exists, however, he can't hear them. explained it was the nature of the vehicle. he also repaired the weatherstripping which had "fallen off" the right rear door. he advised that he did not hear any noise in the transmission area or in the gas pedal. we took to another dealer who had a technician test drive the vehicle and advised that there was both a noise in the area of transmission and a vibration in the gas pedal. returned to the dealer who originally was doing repair work and had him ride with me. at this time, he heard the noise i was complaining about and advised that it was coming from the heat shield at the catalytic converter. made an appointment for repairs, picked up the vehicle and later the same day, the noise returned. took vehicle back, technician said he didn't hear any more noises. waited 2 weeks, made another appointment to return vehicle for right rear door "rattling" , and "heat shield" noise which had become non stop. at this time, they replaced the weatherstripping on the door and again adjusted heat shield by making a "cushion" so that it would not vibrate against the exhaust manifold. this did not resolve the problem, as it still "vibrates" so as i can still feel stress through the gas pedal on the transmission when reaching speed.*

While towing vehicle in neutral, transmission slipped out of gear and a fire started in transmission area. contacted dealer who was not willing to do anything.*ak consumer states that the transfer case shift module failed to engage neutral, consumer had brackets and wiring installed to activate the brake and tail lights when being towed, there is a recall, 01v334, regarding transfer case control module problems, however this vin is not included. *slc

All these problems come and go, somtimes depending on the outside temperature. some of it got fixed and came back again. the major problems are that the vehicle shuts down without any warning - no engine no electric nothing-, so its even not possible to call on star! the other thing is that the transmission start to shift gears while driving on a leveled raod at consistant speed. all this items got fixed and come back after a while. dt

Mirrors 'wander' every time vehicle is unlocked, fail to return to settings creating an unreasonable danger to the occupants of this vehicle as well as other vehicles when changing lanes or merging into traffic due to lack of visability of the area behind the vehicle. transmission failed on a slight incline with parking brake engaged and transfer case locked and in 4wd and transmission in park - vehicle began rolling backwards down the slight grade. there was a recall for this problem - campaign was completed at dealer, but fix is unknown to the owner.

My vehicle rolled backwards down a hill and crashed into a waterfountain and a tree in my front yard. backing out of my garage i stopped quickly after just exiting my garage on a slope of about 6% grade. i had spilled coffee, i put the vehicle into park and stepped out when the car abruptly rolled backward. both of my children were strapped in their seats and i tried to leap back across the drivers seat with my legs hanging out the door. we traveled 50 feet before hitting the waterfountain and tree. the rushing water from the fountain sounded like fule ready to explode. i was taken to the hospital with an injury to my right leg. i informed gmc the following day, feb 1st. on feb 7th i received a response to my complaint from roger lewis, customer relationship managert informing me that "his investigation" revealed no evidence of a product defect. i became aware that my vehicle had been recalled for this very problem and that another recall, not including my vehicle vin, but those made two months later have been recalled for a similar problem. i called gmc informing them and they were unwilling to examine the case further. i am concerned that gmc is ignoring a likely unfixed transmission problem which is potentially dangerous. *ak

When applying brake to release vehicle gear out of park, the gear shift does not release. stuck in park! have to tap the brakes many times to get a release of the gear shift. sometimes it works first time other times takes many attempts. told at dealer that it is the sellenoid. have ordered part from dealer twice and still no part. dealer at first denied being able to reproduce. then, finally admitted other vehicles had same issue.*ak

We purchased a $33,000 new vehicle in october. we immediately noticed the passenger front seat seatbelt locks then starts to tightening and never unlocks. i brought the issue to the service department, the new car sales manager, and gmcs attention. dean cloud in bentley_x0012_s service department told me that the seatbelt is designed to lock so a child_x0012_s safety seat can be put in the front seat. i showed him that the visors in the car and the users manual say never put a car seat in the front with the air bags. he said that the passenger must unhook the seat belt every few minutes then reconnect it. i find this unacceptable. the dealership is putting the passengers in the vehicle in an unsafe and illegal situation by telling them the only solution is to disconnect the seatbelt while the vehicle is in motion. the seatbelt in its current condition is choking the passengers, which is also unsafe. the seatbelt needs to be repaired or replaced. the differential unit had to be replaced. the bearings did not have enough tourqe (that is wht the dealer told me).*ak

When new, the vehicle would unexpectedly go into 4-wheel drive in a slight left turn making the vehicle very hard to steer. i took it back to the dealer of purchase and he reported they could not find the problem. after my warranty ran out he reported the following; 611 encoder actuator, 7764 cst, 1 89059275 actuator. he replaced the actuator at a cost of $275.30 for the actuator and $221.90 labor for a total of 497.20 at my cost! here it is several years later and the vehicle is still doing this occasionally dangerous maneuver. i can't let my wife drive my vehicle because of the safety factor of this happening in heavy traffic. i guess i have no choice but live with this? *tr

Transmission does not seem to downshift; loud fan noise with loss of power; hard shift into gear from start; missing rear seat latch to hold down seat and easily wobbles when shaken; hook for latch is present but no latch present seems to be design flaw. *ak

Vehicle is squealing on front passenger side. also, tranfer case is defective. *ak

While driving, car suddenly shut down completely with no warning. second problem: transmission failed while towing 3300 lbs or less on two separate occasions. *ak

Service engine light illuminates, engine cooling fan engages, engine power greatly reduces and transmission shifts improperly. loud noise from computer controlled engine cooling fan. vehicle will not accelerate or shift properly when driving with fault. fan clutch replaced, computer programming changed with no success of fixing problem. gmc refuses to buy back vehicle. dealership indicates this problem is occurring on all 2002 gmc envoy's at varying levels mine being worse case. vehicle is unsafe for use in any traffic situation as the problem manifest itself rapidly with severe loss of engine power, loud noises from engine and poor shifting and acceleration.*ak