GMC Sierra Owners Manual

Ignition Transmission Lock Check
Vehicle Care / Vehicle Checks / Ignition Transmission Lock Check

While parked, and with the parking brake set, try to turn the ignition to LOCK/OFF in each shift lever position.

Х The ignition should turn to LOCK/OFF only when the shift lever is in P (Park).
Х The ignition key should come out only in LOCK/OFF.

Contact your dealer if service is required.


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