GMC 2016 Yukon XL Denali Owner's Manual page 347

346 Service and Maintenance
Check automatic transmission
shift lock control function. See
Automatic Transmission Shift
Lock Control Function Check
0 282.
Check parking brake and
automatic transmission park
mechanism. See Park Brake and
P (Park) Mechanism Check
0 282.
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 50.
Verify spare tire key lock
operation and lubricate as
needed. See Tire Changing
0 317.