Three problems related to transmission failure have been reported for the 2007 Chevrolet Avalanche. The most recently reported issues are listed below.
Transmission failure with loss of drive, 3, and reverse gears. 2nd and 1st were slipping badly when returned to dealer. Vehicle has approximately 57,100 miles and has never towed or pulled anything. Vehicle is 2wd ltz model.
Transmission failure, no warning signs. Vehicle felt like it popped out of gear. Truck does nothing in drive, only moves in reverse, 1st, and still does major slipping. Online research has informed me that this is a common issue among this type of truck.
The contact owns a 2007 Chevrolet Avalanche 1500. The contact stated that his transmission failed while driving approximately 55 mph. When the accelerator pedal was engaged the transmission acted as if it were in neutral and the vehicle failed to move. The dealer replaced the transmission at 16,000 miles. When the second failure occurred a rebuilt transmission was installed at 26,000 miles. The current and recent failure mileage was 36,000 and the dealer stated that they have to install a rebuilt transmission. The manufacture was notified and the vehicle will be repaired per the warranty. The first failure occurred at 16,000 miles. Updated 10/30/09 the transmission would not go beyond first gear. An internal fault was found in the transmission. There was damage to the input housing at the pump cover seal area. The blower motor was inoperative. The power steering shuddered at low speeds. The hydraulic pressure line was replaced. Updated 10/30/09.