At Least Once A Year - GMC 2007 Yukon XL Owner's Manual

At Least Once a Year

Starter Switch 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.
2. Firmly apply both the parking brake and the
regular brake. See Parking Brake on
page 151.
Do not use the accelerator pedal, and be ready
to turn off the engine immediately if it starts.
3. Try to start the engine in each gear. The
vehicle should start only in PARK (P) or
NEUTRAL (N). If the vehicle starts in any other
position, contact your GM Goodwrench
for service.
562
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 151.
Be ready to apply the regular brake
immediately if the vehicle begins to move.
3. With the engine off, turn the ignition to RUN,
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
®
dealer
shift lever moves out of PARK (P), contact
your GM Goodwrench
®
dealer for service.