GMC Sierra Denali 1500 2023 Owner's Manual page 422

Systems, Fluids, and Visible Leak
Inspection
Engine oil
Transmission
Drive axle
Transfer case
Engine cooling system
Power steering, if equipped
Fuel system
Windshield washer fluid
Tire Inspection
Tire pressure, tread depth, and wear
Rotation, if applicable
Alignment check, optional
Reset tire pressure monitor
Check tire sealant expiration date,
if equipped
Check spare tire, if equipped
Brakes
Check brake system
Visible and Functional Inspections
Seat belt components
Exhaust system
Accelerator pedal
Passenger compartment air filter,
if equipped
Engine air filter
Hoses
Belts
Shocks and struts
Steering components
Axle boots or driveshaft and u-joints
Compartment lift struts, if equipped
Floor mats secured, no interference with
pedals
Horn
Ignition lock, if equipped
Starter switch
Evaporative control system
Lubricate
Chassis components
Service and Maintenance
Special Application Services
Severe Commercial Use Vehicles Only:
Lubricate chassis components every oil
change.
Have underbody flushing service
performed. See "Underbody Maintenance"
in Exterior Care 0 407.
421