2004 Chevrolet Silverado 2500: sudden loss of power

Filed Jun 5, 2026 · Transmission · 50,000 miles · GA

The contact owns a 2004 Chevrolet Silverado 2500. The contact stated that while driving 60-65 MPH, the vehicle experienced reduced power and went into LIMP Mode. The contact pulled over to the side of the road. The contact turned off and restarted the vehicle after several minutes, as per the Owner's Manual. The transmission warning light was illuminated. The vehicle was taken to the dealer to be diagnosed. The contact was informed that it could take 1-2 weeks to diagnose the vehicle, and several months to repair the vehicle. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure, and a claim was filed. The failure mileage was approximately 50,000.

Filed Feb 11, 2018 · Electrical · 107,000 miles · CA

Many of the vehicles in this family suffer from random electrical shorts and or poor electrical grounding relating to the drive by wire throttle actuator. The result is that the vehicle will go into 'reduced engine power' mode randomly. In this mode the vehicle will idle but not accelerate or drive. This issue is well documented on message boards with no consistent fix. This condition exposes an extreme hazard as the vehicle can loose power at any time. This is a serious safety issue that should be investigated. I have had my vehicle loose power on the interstate and on high speed 2 lane roads with no shoulder and heavy traffic on 4 occasions. Numerous attempts to repair the issue have been unsuccessful.

Filed Feb 11, 2017 · Electrical · 142,000 miles · VT

Driving on the interstate at 65-70 MPH truck shut off no power steering no brakes showing "reduced engine power" almost got into a wreck with my 2 year old son and 70 year old grandmother...I still owe $10,000 on this hunk of crap...it went away after a broken wire was fixed....but as I sit here in my truck at 3 am because I had to move it I started it up and once again reduced engine power...just so frustrating

Filed Nov 8, 2015 · Electrical, Engine · 108,096 miles · MD

I experienced a sudden loss of engine power while travelling at highway speed. I am the original owner of a 2004 chevrolet silverado 2500 four wheel drive with the duramax diesel and allison transmission. On sunday, october 4, 2015, shortly after a fuel stop, I was traveling on interstate 24 near paducah, ky. At approximately 65 MPH in the left lane with the cruise control set, I experienced a sudden loss of power accompanied by a loud engine rattling, and the check engine light came on. With some difficulty in heavy traffic, I was able to maneuver to the right shoulder of the road. I was able to drive the vehicle at about 25 MPH on the shoulder. Since I was just a few miles from the paducah exit, I limped there and into a hampton inn parking lot. Aaa responded and towed the truck to royal oaks chevrolet in paducah. Since it was a sunday, the service department was closed. The next morning, the dealership's service department pulled up codes po202 and p2149. The service manager reported that there was a service bulletin on this issue and that it would be several days before the repair parts would be available. I later learned that the service bulletin is #05-06-04-047c. The bulletin addresses "a severe reduction in engine power (limp home mode)" I was charged $1,076 for repairs for a known defect that chevrolet knew about.

Filed Jan 26, 2014 · Engine · 60,000 miles · MA

The bolts are braking off the exhaust manfolds and the manifolds are leaking and the computer is making the truck go into reduced power.

Filed Aug 9, 2011 · Engine · 32,533 miles · OH

I have a 2004 silverado k2500 with a duramax diesel (lly). I bought this truck new in september 2004. I pull a fifth wheel camper. My truck has overheated more than two dozen times, and on some occasions lost power, while pulling the camper up long grades. I reported this problem twice to chevrolet dealers. I have the service orders that clearly describe my overheating problem. Both of these service calls were while the truck was under warranty, but the dealers could not fix the problem. Later when the truck was out of warranty, I found out that general motors recognized the overheating problem and issued a service bulletin #06-06-04-036d that describes my heating problem exactly. This service bulletin was issued prior to either of my complaints about overheating. The cost of implementing service bulletin #06-06-04-036d is approximately $1,300 dollars, so general motors recognizes that this series truck has a significant overheating problem, but apparently they are hiding this fix from the owners until the vehicle is out of warranty. I can give many instances where this overheating problem has caused a safety problem. One time I was pulling the camper east on interstate 40 about a 150 miles west of albuquerque, nm when the truck overheated and lost power. There was no good place to pull over and I was terrified as the heavy traffic had to change lanes and pass me. Another time I was pulling up to the north rim of the grand canyon on a two lane road when the truck overheated, lost power and I had a long line of traffic behind me. It was dangerous as the traffic passed me without good clearance. I could go on and on of similar situations that caused dangerous conditions. There is also a website at www.dieselplace.com that has an entire section devoted to the lly diesel. There are over a thousand posts concerning this overheating problem.

Filed Jun 21, 2009 · Electrical, Engine · 81,098 miles · WY

This is how it started.. I have a 2004 chevy silverado 2500 hd. As I drove down the road the doors would lock and unlock on their own, and the truck would lose RPM's and would act as if the truck shut off and restarted itself. Also the check engine light would blink with the locking and unlocking of the doors. Did this off and on a few times as we babied it home. Got it home in the driveway and it threw 2 codes camshaft position sensor high volts and low volts. So we replaced the camshaft position sensor. Truck drove fine for 4 days. However on the 5th day we attempted to drive the truck and as we were driving down the road this time the engine light came on and stayed on and doors started locking and unlocking again on their own as well as the dic read service brake system and the truck completely died in the middle of traffic, we were able to pull over into a parking lot and truck restarted long enough to get home. At this point the gm dealer wasn't sure of this problem and what causes it but stated to unplug the battery and reset the computer(after speaking to 4 different gm dealers mind you). Wow low and behold fixed the problem for about 45 minutes, as we again tried to see how far we could make it before it started acting up again. Only this time doors would lock and unlock and all kinds of weird things were going on, for example doors locking and unlocking, truck stalling and restarting, idol was ruff and noisy, service engine light came on and stayed on, and the dic read this time reduced engine power!! And at this point we were only able to go 15 miles an hour and thankfully we were on a road with no traffic and were about 2 miles from our home. Also in the mist of all of this the truck was chiming and the truck thought it didn't have any brakes at this point thankfully we were able to get the truck to come to a complete stop. We have had this truck for less than 1 yr and it only has 82,000 on it and noone seems to be able to tell us what is wrong with it.

Filed Aug 22, 2006 · Fuel system · 69,407 miles · MI

I was driving down the freeway going 70 MPH on my way to work during rush hour traffic in the fast lane. All of a sudden I lost power and the truck started slowing down quickly. I immediately had to try to get over and get off the freeway so that I would not get run over, which is not an easy thing to have a vehicle on the freeway during rush hour that will not go over 15 MPH. This is not very safe and I could have easily have caused an accident by cars trying to swerve around my vehicle that would not accelerate. The problem was the #7 fuel injector connector, which has been replaced and I do have the old part. I am not the only one this has happened to and this should not be happening to a two year old vehicle. When this part breaks, I feel people are at risk and this should be taken care of.