GMC Sierra Limited 1500 2019 Owner's Manual page 437

436 Service and Maintenance
Visually inspect exhaust system
and nearby heat shields for
loose or damaged parts.
Lubricate body components. See
Exterior Care 0 422.
Check starter switch. See Starter
Switch Check 0 359.
Check automatic transmission
shift lock control function. See
Automatic Transmission Shift
Lock Control Function Check
0 359.
Check ignition transmission lock.
See Ignition Transmission Lock
Check 0 360.
Check parking brake and
automatic transmission park
mechanism. See Park Brake and
P (Park) Mechanism Check
0 360.
Check accelerator pedal for
damage, high effort, or binding.
Replace if needed.
Visually inspect gas strut for
signs of wear, cracks, or other
damage. Check the hold open
ability of the strut. If the hold
open is low, service the gas
strut. See Gas Strut(s) 0 361.
Inspect sunroof track and seal,
if equipped. See Sunroof 0 53.
Verify spare tire key lock
operation and lubricate as
needed. See Tire Changing
0 400.
Visually inspect the spare tire to
ensure that it is tightly stowed
under the vehicle. Push, pull,
and try to turn the tire. If the
spare tire moves, tighten as
necessary. Verify that the wheel
retainer plate compression
spring is fully compressed. See
Tire Changing 0 400.