GMC Terrain 2018 Owner's Manual page 347

346 Service and Maintenance
Check parking brake and
automatic transmission park
mechanism. See Park Brake and
P (Park) Mechanism Check
0 279.
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 ability is low, service the
gas strut. See Gas Strut(s)
0 281.
Check tire sealant expiration
date, if equipped. See Tire
Sealant and Compressor Kit
0 315.
Inspect sunroof track and seal,
if equipped. See Sunroof 0 52.