GMC Sierra Denali 2017 Owner's Manual page 441

440 Service and Maintenance
Lubricate body components. See
Exterior Care 0 427.
Check starter switch. See Starter
Switch Check 0 371.
Check automatic transmission
shift lock control function. See
Automatic Transmission Shift
Lock Control Function
Check 0 371.
Check ignition transmission lock.
See Ignition Transmission Lock
Check 0 371.
Check parking brake and
automatic transmission park
mechanism. See Park Brake and
P (Park) Mechanism
Check 0 371.
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. See your
dealer if service is required.
Inspect sunroof track and seal,
if equipped. See Sunroof 0 48.
Verify spare tire key lock
operation and lubricate as
needed. See Tire
Changing 0 408.