[rshadd]

Ralph's correct the front supplemental inflatable restraint sensors are mount in the lower radiator support.

 

[rshadd]

Damn poles... they're always popping up out of nowhere.

I pretty sure that the seats have sensors in them. If your not sitting in the seat the bags won't deploy.

 

[rshadd]

GM sensors are inertia sensors not impact sensors. The air bag will inflate only if the impact speed is above the system's designed "threshold level." If your truck goes straight into a wall that doesn't move or deform, the threshold level is about 14 to 18 mph (23 to 29 km/h). If you strike something that moves or deforms, such as a parked car, the threshold level will be higher. Inflation is determined by the angle of the impact and the vehicle's deceleration.

The air bag system is described in detail in your owner's manual.

What you don't have a manual? Download one here: http://www.355nation.net/forum/how-...e-bulletins/52183-chevrolet-colorado-gmc-canyon-owners-manuals-2004-2012-a.html

 

[rshadd]

There actually a lot going on, but very basically the front sensors act as an accelerometer.