GMC Yukon Denali 2013 Owner's Manual page 404

11-4 Service and Maintenance
Check parking brake and
automatic transmission park
mechanism. See Park Brake and
P (Park) Mechanism Check on
page 10 28.
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 on
page 2 20.
Check hybrid low pressure
coolant level, if equipped.
Verify spare tire key lock
operation and lubricate as
needed. See Tire Changing on
page 10 62.