Huge win for car owners! All TSBs to be made public. The Center for Auto Safety just made the NHTSA (US Government) make public the full text of all TSBs from now on. They are the same organization that has petitioned the NHTSA & filed lawsuits to protect car owners over exploding gas tanks & other major safety issues. Whenever you drive in your car, you are safer thanks in part to a lot of work over the years by this small but very effective consumer advocacy group.

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really awful
Crashes / Fires:
1 / 0
Injuries / Deaths:
2 / 0
Average Mileage:
36,796 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2004 Chevrolet Avalanche transmission problems

transmission problem

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2004 Chevrolet Avalanche Owner Comments

problem #8

Feb 052010


  • 23,965 miles


The contact owns 2004 Chevrolet Avalanche. The contact was driving 55 mph when the rpms increased. The contact had difficulty switching gears and the vehicle lost power. The windshield wipers would not shut off unless the contact restarted the vehicle. The transmission and the water pump failed completely. The driver side door handle broke and the contact cannot get out of the vehicle unless she climbs over the passenger seat. The speedometer only displayed 10 and 20 mph whenever it was cold outside. The failure mileage was 23,965 and the current mileage was 97,323.

- Southington, OH, USA

problem #7

May 252009


  • 30,000 miles
While driving on freeway vehicle was revving up, immediately exited freeway and found transmission was gone, vehicle would not go in reverse, did drive in neutral. Vehicle has only 30K miles. Took vehicle to transmission mechanic stated the Chevy Avalanche and denali are known for this, and feels this is a factory defect. His vehicle too went out at 20K miles. My cousin transmission too went out at 50K miles, would like to have dealer repair my vehicle. How many more vehicles does the NHTSA need to complain about so the matter can be corrected by the dealer(s) or manufacture.

- Ontario, CA, USA

problem #6

Sep 052008


  • 69,124 miles
I have problem with the brake system, and the transmission fluid came out from the from front passenger side. I took it to the Chevy dealer, but I was told that the transmission clutch was burned out, maybe it an defected transmission or recall, im not sure, but I do know that the transmission and the brake system are not in safe conditions, nor workable. Not to mention the cracking noise in the front of the suspension, while turning.

- Norwalk, CA, USA

problem #5

May 202007

Avalanche 8-cyl

  • Automatic transmission
  • 30,000 miles


Transmission or other electrical device failed allowing my 2004 Chevrolet Avalanche to roll backwards into a lake.

- Anderson, SC, USA

problem #4

Aug 232007

Avalanche 4WD 8-cyl

  • Automatic transmission
  • 45,400 miles
While driving on highway truck transmission started not shifting and at 55mph was running 4500 RPM, truck system then warned of a hot transmission. Brough to dealer told transmission is no good, under extended warranty can only get a rebuilt transmission if approved by GM.

- Wilmington, MA, USA

problem #3

Jun 292006

Avalanche 8-cyl

  • Automatic transmission
  • 50,882 miles
Popping, binding noise and vibration in drivetrain.

- Verbena, AL, USA

problem #2

Mar 122006

Avalanche 4WD 8-cyl

  • Automatic transmission
  • 39,000 miles
My husband, my two children and I were all in our 2004 Chevrolet Avalanche K1500, headed to church on Sunday morning, going down the street we live on. My husband, who was driving, turned on the cross street. All of a sudden, every one heard a big clunk, like some thing had dropped. The car would not move forward. My husband drove our vehicle backwards all the way home. It was parked for a few weeks, while we contacted aaa, the manufacturer, and local Chevy dealerships to find out about repair and warranties. We believe this is a failure of the transmission. This vehicle has about 39000 miles, just over the written warranty, which is 36000. The manufacturer has not yet offered to pay for the repairs but advised us to take it in to the Chevy dealership to confirm the diagnostics. The vehicle is currently be tested by a Chevrolet dealership in redding, ca. The dealership has contacted the manufacturer to find out what they will do to repair the confirmed "transmission" problem. This is an expensive repair that has resulted in our loss of use of a vehicle that was within its normal expected use and represents a substantial financial burden. I have also contact the federal trade commission. I was please to know that the vehicle may still be within its implied warranty (first four years) and the right to revoke purchase may be an option if the manufacturer and dealership refuse to correct the problem at no cost to us. I am concerned that the problem, however, may be more widespread, and felt I should report this defect of the Chevrolet Avalanche 2004 K1500, for further investigation in case other owners have the same issue.

- Cottonwood, CA, USA

problem #1

Mar 162004


  • 6,000 miles
When the consumer attempted to accelerate from a stop, the vehicle hesitated intermittently. The vehicle needed a new alternator, radio system (cd would over heat).

- Rockland, MA, USA

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