Chevrolet Avalanche owners have reported 1
problem related to gas tank strap (under the other fuel system category).
The most recently reported issues are listed below.
1 Gas Tank Strap problem of the 2003 Chevrolet Avalanche
Failure Date: 07/15/2013
Strap on gas tank broke (rusted through) while driving on bumpy road. Tank fell and hit driveshaft. I was surprised it didn't rupture the tank.