Warning:When you are doing this inspection, the vehicle could movesuddenly. If the vehicle moves, you or others could beinjured.
Before starting this check, be sure there is enough room around the vehicle. It shouldbe parked on a level surface.Apply the parking brake. Be ready to apply the regular brake immediately if the vehiclebegins to move.With the engine off, turn the ignition on, but do not start the engine. Without applyingthe regular brake, try to move the shift lever out of P-(Park) with normal effort.If the shift lever moves out of P-(Park), contact your dealer for service.
Fuel Pressure Relief Engine Control
DrivelineDiagnostics
By monitoring and reporting on the
vehicle's key systems, OnStar
Advanced Diagnostics provides a
way to keep up on maintenance.
Capabilities vary by model. See
www.onstar.com for details and
system limitations. Message and
data rates may apply. Advanced
Diagnostics requires an active
OnSt ...