Sierra 1500 2WD V8-5.3L Hybrid (2004)
Impact Sensor: Description and Operation
Side Impact Sensor (SIS) (Right) With RPO HP2
INFLATABLE RESTRAINT SIDE IMPACT SENSOR (SIS) (RIGHT) WITH RPO HP2
The right side impact sensor (SIS) contains a sensing device which monitors vehicle acceleration and velocity changes to detect side collisions that are
severe enough to warrant disabling the 42-volt system. The SIS is not part of the deployment loop, but instead provides an input to the sensing and
diagnostic module (SDM). When the SDM receives a signal from the SIS that a collision has occurred, the SDM communicates this over the vehicles
communication bus. The module responsible for the 42-volt system receives this message and disables the 42-volt system.
