SOURCE: find front airbag sensor 2003 Sierra
The front crash sensor is on or near the radiator support under the hood, it is a little square box, one question why do you think it has a problem? it is a mechanical device, a steel ball bearing sitting in an inverted cone, when you crash the ball bearing breaks free of the magnet, that breaks a connection and signals the airbag monitor to fire the airbags, it takes a 5+ MPH impact to set all this in motion, there are side impact sensors as well, the physics of these are a little different, they are measured in G force of the impact, hope all this doesn't bore, one note the fuel that fires the air bag is made by the same folks that make rocket fuel for the solid fuel boosters of the space shuttle.
SOURCE: center airbag sensor bad.
it is located in the front of the radiator on the radiator support if memory serves me correctly.
SOURCE: where is the CTS AIRBAG SENSOR LOCATED?
On the front radiator support, usally a black box, it should have a plug on it.
SOURCE: Where is the Front impact sensor for the airbags
if you were to pull the front bumper off youll see a metal cover running the width of the vehicle. there are 4 of them through there
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