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Automatic Transmission Shift Lock
Control System Check
{CAUTION:
When you are doing this inspection, the
vehicle could move suddenly. If the
vehicle moves, you or others could be
injured.
1. Before you start, be sure you have enough
room around the vehicle. It should be parked
on a level surface.
2. Firmly apply the parking brake. See Parking
Brake on page 127.
Be ready to apply the regular brake
immediately if the vehicle begins to move.
3. With the engine off, turn the ignition to ON,
but do not start the engine. Without applying
the regular brake, try to move the shift
lever out of PARK (P) with normal effort. If the
shift lever moves out of PARK (P), contact
your GM Goodwrench
®
dealer for service.
Ignition Transmission Lock Check
While parked, and with the parking brake set, try
to turn the ignition to OFF in each shift lever
position.
• The ignition should turn to OFF only when the
shift lever is in PARK (P).
• The ignition key should come out only in OFF.
Contact your GM Goodwrench
®
dealer if service
is required.
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