One problem related to air bag on-off switch has been reported for the 2007 Chevrolet Avalanche. The most recently reported issues are listed below.
Cracked dashboard on passenger side where airbag is fitted. Upper lefthand side of airbag. Traction control/stabilitrac system: service indicator warnings activate, switches from 2 wheel drive to 4 wheel drive high even though selector is in 2wd mode. The first occurrence of this was at 70k miles, then again at 90k. Then again at 97k the transmission was damaged and needed to be replaced. Again at 101k miles the ringgear in the rear axel was destroyed. Rear axel was replaced. Fifth time for those counting, 116k miles service stabilitrac and service traction control warnings, switching from 2wd to 4wd high while moving, while parked, selector in 2wd position with someone at the wheel or cab empty. Evaporative emission control warning. Check engine light on, code comes back to eec. Indicating a leak in the return line. The first time this was replaced at 70k miles, this is the second time. And no it is not the gas cap being loose or needing replaced. The first time there was "water in the connector" (yeah sure).