One problem related to air bag not deploy has been reported for the 2008 Chevrolet Express 3500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 Chevrolet Express 3500 based on all problems reported for the 2008 Express 3500.
On July 17, 2013 I crashed my 2008 roadtrek 190 popular (Chevrolet Express 3500 chassis) in a roadside ditch. Fortunately no one was hurt but the driver-side airbag did not deploy. Neither did the passenger-side airbag but it may have been turned off. In any event, the seriousness of the crash suggests that there may have been a malfunction of the airbag. I have no intent to seek any damages from roadtrek or gm as I did not sustain any significant injury and was adequately restrained by my seatbelt. I am letting you know just in case this might be a problem on some of these vehicles. Contact me via email if you want photos or the location of the vehicle.