Chevrolet 2015 Impala Owner's Manual page 359

11-4 Service and Maintenance
Check parking brake and
automatic transmission park
mechanism. See Park Brake and
P (Park) Mechanism Check on
page 10-24.
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 2-24.