2003 GMC Envoy: sudden loss of power

8 of the 394 complaints about the 2003 GMC Envoy describe sudden loss of power.

owner complaints: 8
of this car's complaints: 2%
typical mileage: 74,000
recalls: 0

Is there a fix? 130 service bulletins cover this area of the car. See below

Sudden loss of power by model year

2008
3
2007
1
2006
8
2005
2
2004
9
2003
8
2002
31
1996
1

What owners say

Filed May 20, 2014 · Transmission · 175,000 miles · GA

Tl* the contact owns a 2003 gmc envoy. The contact stated that the vehicle lost all power after an attempt was made to shift gears from drive to park . The manufacturer was not notified of the failure. The failure mileage was 175,000. The current mileage was 175,000.

Filed May 7, 2013 · Engine · 170,000 miles · PA

Tl* the contact owns a 2003 gmc envoy. The contact stated that while driving approximately 45 MPH, the check engine warning light illuminated and there was loss of engine power. The vehicle was taken to a private mechanic where it was diagnosed that the sensor pedal, the clutch fan, wiring terminals, and accelerator pedal needed to be replaced. The manufacturer was made aware of the failure. The vehicle was repaired but the failure recurred. The approximate failure mileage was 170,000 and the current mileage was 175,00.

Filed Sep 1, 2010 · Engine · 145,000 miles · TX

2003 gmc envoy - check engine light & reduced engine power light. Vehicle slows to 20 MPH losing power. My daughter was almost hit in the side of the vehicle as she lost power in the intersection. Thankfully, the oncoming vehicle was able to stop.

Filed Aug 12, 2010 · Transmission · 60,000 miles · DE

Tl*the contact owns a 2003 gmc envoy. The contact was driving approximately 15 MPH approaching a stop signal there was a slight loss of engine power. The contact was able to continue driving. The vehicle was taken to an authorized dealer where the fan clutch was replaced. The failure recurred after 20,000 miles after the replacement of the fan clutch by an independent mechanic. Recently, the identical failure occurred for the third time. The manufacturer advised the contact to trade-in the vehicle and they would offer her a $1,400 certificate. The contact was displeased with the response from the manufacturer. The vehicle was not repaired. There was concern of a potential safety hazard. The failure mileage was approximately 60,000.

Filed Dec 25, 2007 · Steering · 74,000 miles · NY

Made sharp right turn---lost all power steering---checked , belt,fluid--power steering did not return --car can not be driven.

Filed Nov 17, 2005 · Acceleration, Engine · 35,000 miles · TX

Car: gmc envoy 2003 when driving on a highway check engine light came on. "reduced power" light came on too. Engine rpms dropped down to 1100. Barely avoided crash. *jb made it to the parking lot. Restarted engine few times same problem. Executed "clear change oil light" procedure few times. It cleared "check engine" light and everything is normal now. The vehicle is equipped with "change oil" timer and light. It appears that when timer expired the computer rather than turning "change oil" light on enables "check engine" light and drastically reduces engine power. When it happens on a highway it can easily lead to a crash. I plan to take the vehicle to a dealership in two days. Thank you.

Filed Nov 13, 2005 · Engine · 23,450 miles · CA

I am the owner of a 2003 gmc envoy slt, 2wd, and I have had my vehicle into the dealership three times for a problem which I consider an extreme safety hazard. My vehicle has now failed for a 4th time and the dealer refuses to admit that they cannot fix the problem. My vehicle loses power as I am accelerating on to highways and I have almost been hit by trucks on two separate occasions pulling out on to a highway as I am unable to go over about 10 MPH and have to pull off the roadway. The vehicle was in for a third time for that same problem back in january. The dealer had it for a week and put over 400 miles on my vehicle to find out what was causing the problem. The same problem is happening again, 6 times in 3 days, and the service manager will not admit its the same problem since so much time has elapsed. After I lose power, my "reduced engine power" and my "service engine soon" lights come on. I must pull over and turn my engine completely off and then back on again. The "reduced engine power" light goes out but the "service engine soon" light remains on. The first two times the dealer had the vehicle I do not believe they replaced any parts as they felt it was a computer problem. The third time they had the vehicle they did replace some part, but it was never fully explained to me what they replaced. Since this is a safety hazard to me and my family, I feel that this problem should be reported to you in case I am involved in an accident and injuries do occur, I want it on record that this problem is occurring with this vehicle. **please note that the incident date I have entered was the last date it has occurred, I just started keeping a log since it started happening again**

Filed Mar 24, 2005 · Engine · 16,000 miles · NJ

After starting the vehicle, letting it warm, the consumer entered the highway at 65 MPH , the vehicle suddenly lost power, the check engine light and the engine power reduced light came on. The vehicle would only do 10 MPH. The consumer will have the vehicle serviced since this is the second occurrence. *nm whenever the vehicle was cold, the engine light would come on and then the vehicle would lose total speed. *sc