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.

Please take a moment & say thank you by donating $5 or whatever you can to the Center for Auto Safety.

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hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
62,770 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 drivetrain problems

drivetrain problem

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2004 Chevrolet Avalanche Owner Comments

problem #5

Nov 122014

Avalanche 4WD 8-cyl

  • 88,000 miles


4X4 transmission began locking and slipping. Developed a distinctive "clunking" sound when shifting between gears. Now most noticeable between second and third. Additional grinding sound occurs when driving. Noticeable at all speeds.

- White House, TN, USA

problem #4

Dec 312012


  • 76,450 miles
Drove off a parking lot at about 20mph and the transmission quit. Reverse works and all the low gears work out not on automatic mode.

- Castro Valley, CA, USA

problem #3

Jun 152011


  • 75,000 miles
Second Chevy 04 that transmission went in my first was a Tahoe now my Avalanche! all this money into vehicles and they don't last 50,000 miles or with my truck 75,000 what is wrong with Chevy transmissions? we traded Tahoe in for a Subaru and my next truck will not be a Chevy even though I have alot of money on my GM credit card towards a new vehicle!

- Keeseville, NY, USA

problem #2

Sep 262011

Avalanche 8-cyl

  • 73,501 miles
Vehicle transmission failed at 73,500 miles. Vehicle just stopped in middle of highway while traveling at approx 45 miles per hour. Subsequent rebuild by mechanic revealed that GM had installed incorrect valve body gaskets in the transmission, likely contributing to the premature failure.

- Berlin, NJ, USA

problem #1

Jan 102004

Avalanche 4WD 8-cyl

  • Automatic transmission
  • 900 miles
During acceleration (taking foot off acclerator stops noise) a grinding noise appears to be coming from rear axle or transmission. Noise is intermittent, occurs approximately 4-5 times per week. Have not been able to identify unique conditions that cause occurrence. Noise will generally only occur for a single acceleration and after it goes away, it is unknown when it will return.

- South Lyon, MI, USA

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