2003 Chevrolet Avalanche Transmission and drivetrain Problems

“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 again. The speedometer is stuck at 120 MPH, the u joints have been replaced and now the transmission has gone out. I feel that chevorlet should fix these problems under a warranty/recall.”

“2003 chevorlet Avalanche 1500 - drive shaft universals failed (front gone, rear going. I had dealer replace both) - I noticed the noise and immediately took vehicle in. Had I not noticed or could not pinpoint the cause I may have continued driving and it could have failed and failing while driving on the thruway would not have been a good thing as the front end of the driveshaft impacts the road. …”

“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 under the vehicle. I drove my vehicle for a little while and when I checked again it was leaking still. I crawled under the vehicle and saw that it was leaking from where it connects to the engine or axle. (not sure what its called). …”

“2003 Chevrolet Avalanche with harsh and suden unexpected down shifts. Dealer has attemped repair several times without repairing the problem. When slowing in traffic or for a turn the transmission will downshift hard and clunk and bang as if something is going to break. This in my opinion is a safety hazard on slippery roads while making a turn as it could cause a spinout. Last call from dealer the service manager read to me a TSB from Chevrolet saying this was a normal condition and not to attempt a repair. Not acceptable. I have been an auto tech for 38 years. …”

“Transmission started making growling and whining noise while attemping to shift into 4th gear, then started slipping in 4th gear.shifting was also stiff or harsher than was normal for the vehicle prior to this. I took to dealer and was dismissed as their computer did not record any trouble codes. 1 week later, and only 65 miles travel distance, both 2nd and 4th gears completely failed, causing a complete overhaul and rebuild of transmission. Vehicle had only 14, 700 miles on it when problem surfaced. Dealership told me no known problems associated with this model vehicle.”