At Each Fuel Fill; At Least Once A Month - GMC Sierra Classic 2007 Owner's Manual

At Each Fuel Fill

It is important to perform these underhood checks
at each fuel fill.
Engine Oil Level Check
Check the engine oil level and add the proper oil if
necessary. See Engine Oil (Gasoline Engine)
on page 482 for further details.
Notice: It is important to check the engine oil
regularly and keep it at the proper level.
Failure to keep the engine oil at the proper
level can cause damage to the engine not
covered by your warranty.
Engine Coolant Level Check
Check the engine coolant level and add
®
DEX-COO coolant mixture if necessary. See
Engine Coolant on page 498 for further details.
Windshield Washer Fluid Level Check
Check the windshield washer fluid level in
the windshield washer fluid reservoir and add the
proper fluid if necessary.
622

At Least Once a Month

Tire Inflation Check
Visually inspect your vehicle's tires and make sure
they are inflated to the correct pressures. Do
not forget to check the spare tire. See Inflation -
Tire Pressure on page 547. Check to make
sure the spare tire is stored securely. See
Changing a Flat Tire on page 560.
Tire Wear Inspection
Tire rotation may be required for high mileage
highway drivers prior to the Engine Oil Life System
service notification. Check the tires for wear
and, if necessary, rotate the tires. See Tire
Inspection and Rotation on page 549.