2004 Chevrolet Suburban: sudden loss of power

Filed Jun 30, 2014 · Acceleration, Engine · 75,000 miles · TX

I was traveling down the road at 60 MPH when the display said "reduced engine power" and my vehicle decreased in power. It didn't matter how much I pressed the accelerator the car would only go 10 miles an hour. I pulled over, checked under the hood, everything looked fine. Started it again, it drove fine for about 2 miles then the same message was displayed. I turned around and headed home driving 10 miles an hour.

Filed May 7, 2014 · Acceleration, Engine · 65,250 miles · CA

Driving down the road, when all of a sudden "reduced engine power". Replaced the throttle body, pedal sensor, and wiring harness without any success. Gm wants 150 just to plug it into their computer to tell me what I can get down for free with my buddies code reader....no I won't let my wife or children drive the car. I only drive it to and from work. Had to go out and buy a toyota just to keep my mind at ease so my wife and or kids won't get killed from this problem. It seems like chevy/gmc doesn't care about this issue until multiple people die from this. I hope to see that they will do the right thing. Thinking of contacting my congress representative to see what they can do to help out us that are dealing with this issue. Nobody else is.

Filed Sep 3, 2012 · Driver assistance, Electrical · 140,000 miles · LA

The vehicle will shut off at interstate and low speeds and show reduced power and stability system disabled. This is very dangerous, I was nearly killed on the interstate by and 18 wheeler coming up behind me when the engine shut down..

Filed Mar 18, 2011 · Engine · 75,000 miles · WA

2004 chevy suburban w/80,000 mi. Used for towing rv-"reduced engine power". Codes are not specific for the problem and multiple repairs have not fixed problem. This is an extreme hazard when towing as rig cannot move off the road with so little power. I am reading many posts online for the same issue.

Filed Feb 15, 2011 · Engine · 104,788 miles · CA

Tl*the contact owns a 2004 chevrolet suburban. While driving approximately 3-5 MPH the vehicle stalled. The warning light displayed reduced engine power. She engaged her hazard lights and pulled over to the right side of the road. She turned the vehicle off and waited a few seconds and was able to restart it. When she restarted the vehicle the reduced engine light was still on and she turned the vehicle off again and restarted it. The vehicle began to function normally. The vehicle was not taken to the dealer for the failure. The failure and current mileage was 104,788.

Filed Feb 19, 2009 · Driver assistance, Electrical · FL

Engine intermittently goes into "reduced engine power" "traction control disabled" for no apparent reason. Engine power is reduced by two thirds. Issue has been occurring for approximately 2 years now. Gm/chevy dealership has been unable to resolve the issue. I've had the car in the shop over 20 times some times on a weekly basis. Throttle body, tac, battery cables, and other components have been changed to no avail. Several close calls on the freeway with 18 wheelers bearing down on rear end when issue has occurred. I no longer allow my wife and kids in the car. I'm sure someone will eventually die as a result of this issue and maybe then gm will address the issue. Hopefully when it happens it will not involve small children which is what suburbans are typically purchased for...to drive around families with small children. Consumers thinking they are purchasing a good size vehicle that will keep their family safe should steer away from gm products.

Filed Jul 2, 2006 · Fuel system · 31,000 miles · CO

6-2006, 98 degrees, centennial, colorado 2004 chevy 8.1 liter suburban, driving 55-60 MPH for approx. 1 hour(no trailer) vehicle suddenly loss power, I had to pull over and have vehicle towed to chevy dealer. (dealer stated codes indicated misfiring) further testing, service was able to duplicate issue and locate a bulletin outlining the problem. Per dealer, faulty fuel pump, gm advised to switch fuel pump to a high altitude pump, to remedy the issue. Which was done, and it fixed the issue. As the 8.1 liter suburban is a veh. Primarily used for towing, this needs to be a recall or campaign to warn people. This sudden loss of power and control could be catastrophic in nature.

Filed Jun 16, 2006 · Engine · 53,599 miles · CA

Dt*: the contact stated while traveling at various speeds, the reduced engine power alarm rings and the engine immediately loses power. The power returns after the vehicle is turned off and back on. The dealership rewired the vehicle, replaced the modulator, sensor and relay. These attempts have not repaired the problem.

Filed Jan 6, 2005 · Transmission · 17,497 miles · NC

2004 suburban lt with 4 wheel drive. Occaisional loss of power when turning and accelerating into traffic. Usually lasts about two seconds before power returns. This is extremely dangerous when pulling into heavy traffic. Chevrolet has replaced the fuel pump , a timing device in the transmission and an air sensor over the course of six trips to the shop. I was told yesterday that this problem is known to gm engineers as the four wheel automatically sensing a need to shift , and that there was no known fix. I have and active complaint with gm, case number 1-269747819 since 10/21/2004.

Filed Nov 19, 2004 · Brakes · 6,766 miles · NC · crash · 1 injury

Update to complaint 10098773. Brakes failed to stop 2004 suburban during hard stop at under 40 MPH. Lost power assist and some steering capabilities. Felt like the rotors were defective. Brake pedel was firm but would not slow. Impact @ around 20mph cause over $10,000 damage including a bent frame. I had a davis instruments carchip reader recording several metrics including speed. Car was new in august with less than 8,000 miles. I have all the carchip logs for this car from around the time I acquired it. Had problems with the dealer from day one due to suspect repairs on an earlier vehicle which had emissions and transmissions problems. Dealer conviced me to trade up once they realized that they could not fix the old car after multiple attempts between march and july 2004. 22 year collision free driving record. Electrical engineer with 18 years experience in hardware and software including military weapons systems, operating systems, networking and telecommunications. I have never encountered this type of problem with any other car I have owned. Called gm 11/18/04. No response yet. Mechanic found a service bulletin recall 04v045000 - possible hydro-boost defect which matches the decription I explain. Some one needs to get in front of this issue before a more serious accident occurs. I have a 2 year old son who thankfully was not in the car at the time.