Electronic Column Lock Assembly
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, and 2002 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
Gearshift lever is locked in Park position when ignition switch is in LOCK position. With ignition on, gearshift lever is allowed movement to desired position. Ignition key cannot be removed until gearshift lever is returned to Park position. Electronic column lock is located on steering column. See Fig 1 .