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Home >> GMC >> 2012 >> Sierra 3500 4WD V8-6.0L >> Repair and Diagnosis >> Maintenance >> Service Intervals >> Routine Service >> Vehicle Checks >> Ignition Transmission Lock Check
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Ignition Transmission Lock Check



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.

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

The ignition key should come out only in LOCK/OFF.