2003 Chevrolet Avalanche power train problems
14 owner complaints filed with NHTSA name the power train on the 2003 Chevrolet Avalanche — 7% of all complaints for this model year.
What owners report
“I noticed a spray on the back of my avalanche. I checked nuder the vehicle and noticed a small puddle of fluid which appeared to be transmission fluid. I checked the fluid level and it was near empty. I added fluid and when I used the vehicle it ran ok, but when I stopped it left a larger puddle…”
filed Apr 18, 2013
“I have had several issues with my 2003 chevorlet avalanche z71 only 62,000 miles. My problems started around 8,000 miles with the rear brakes going bad. I have replaced the front and rear brakes four (4) times since I have owned it. The abs speed sensors have been replaced once and need replaced…”
filed Jan 23, 2012
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
This informational bulletin provides technicians with information regarding automatic transmission oil cooler flow test essential tool J-45096 TransFlow®.
02-07-30-052J · Service Bulletin/Repair Instructions · issued May 29, 2015
Power Train problems in other Avalanche years
| Year | Reports | Share |
|---|---|---|
| 2013 Avalanche | 1 | 1% |
| 2012 Avalanche | 3 | 8% |
| 2011 Avalanche | 9 | 7% |
| 2010 Avalanche | 3 | 3% |
| 2009 Avalanche | 1 | 1% |
| 2008 Avalanche | 4 | 2% |
| 2007 Avalanche | 13 | 3% |
| 2005 Avalanche | 9 | 13% |
| 2004 Avalanche | 14 | 8% |
| 2002 Avalanche | 25 | 6% |
Other reported problem areas on the 2003 Chevrolet Avalanche
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.