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Username Post: 2008 Tahoe service air bag        (Topic#347473)
MondoDuke 
Forum Newbie
Posts: 2

Reg: 10-02-17
10-02-17 07:38 PM - Post#2709576    

I have a 2008 Tahoe and it is showing “service air bag” on the dash. I have used two different scanners that are capable of scanning airbag sensors or as GM calls it, the SDM, how ever it is unable to communicate with it. I have checked both fuses under the hood, not blown and have power. I have checked for loose and/or lost connections under both seats, all seem fine. I was able to locate the SDM under the drivers seat, doesn’t appear to have been wet or corroded. I am at a lose and don’t know of what else I can do. Please help.



 
Shepherd 
Frequent Contributor
Posts: 1343

Loc: Lake George, NY
Reg: 11-11-15
10-03-17 02:16 PM - Post#2709656    
    In response to MondoDuke

Welcome to CT. What were the circumstances that initiated sirs warning lite?



 
MondoDuke 
Forum Newbie
Posts: 2

Reg: 10-02-17
10-04-17 07:00 AM - Post#2709723    
    In response to Shepherd

The vehicle was in idle for about 30 minuets, then it just came on. To my knowledge, there was no real reason why it came on. But I am still unable to communicate with the SDM.



 
Shepherd 
Frequent Contributor
Posts: 1343

Loc: Lake George, NY
Reg: 11-11-15
10-04-17 07:46 AM - Post#2709731    
    In response to MondoDuke

Check this. https://www.justanswer.com/chevy/5xyg7-chevrolet -k...



 
rockfangd 
"5th Year" Gold Supporting Member
Posts: 2437
rockfangd
Age: 32
Loc: Utica ny
Reg: 04-13-10
10-04-17 07:06 PM - Post#2709796    
    In response to Shepherd

check the impact sensor at the bottom of the radiator support.
Very common. Gets water in it and breaks.
99% of this era airbag lights I have resolved by replacing that sensor.
Square. 2 pin plug. held in place by a torx screw

What kind of scantools are you using?
Are all of the other modules showing up on the list?
May be a water issue with the module, or a wire to it.

Old School GM fan FOREVER


Edited by rockfangd on 10-04-17 07:41 PM. Reason for edit: No reason given.

 
N8sToolz 
Very Senior Member
Posts: 2322
N8sToolz
Age: 32
Loc: N 42° 53.290' W71° 34.1...
Reg: 10-23-03
10-04-17 07:31 PM - Post#2709798    
    In response to rockfangd

Should start off by checking to see that there is power and ground at the SDM module. It's not uncommon to see broken wires in the floor. Have you tried talking to any other modules in the truck? ABS, BCM, Occupant Classification Module?

Check AlldataDIY.com too for repair info, most is copied right from GM.



 
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