Table 1 shows eight common power train related problems of the 2005 Chevrolet Avalanche. The number one most common problem is related to the power train (nine problems). The second most common problem is related to the automatic transmission (three problems).
At 80k I put my truck in reverse and heard a clunk sound and immediately it wouldn't shift gears anymore. I went and had the transmission rebuilt which lasted roughly 10k more. Now, the truck won't shift yet again and the filter was changed and the rear output seal. Read details...
At highway speed, service 4 wd light came on, stated vehicle lost speed/power and the 4 wd selector shifted on its own into 4 wd hi. . . . . Very dangerous situation. . . To lose speed and power in highway traffic. Read details...
At approx 47000 mi traveling at 65mph a heavy thud in the engine compartment that sounded like the whole engine block had dropped out, was able to coast off road to a vacant lot. Transmission toast with damage to ring and pinion gears,never towed anything, city driving to work and home mostly. Read details...