At Least Once A Month; At Least Once A Year - GMC 2006 DURAMAX Manual

Engine Coolant Level Check
Check the engine coolant level and add
®
DEX-COOL coolant mixture if necessary.
See Engine Coolant on page 5-34 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.

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 "Tires" in your owner manual
for further details. Check to make sure the spare tire
is stored securely. See "Changing a Flat Tire" in
your owner manual.
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" in
your owner manual.
6-12

At Least Once a Year

Starter Switch Check
CAUTION:
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When you are doing this inspection, the
vehicle could move suddenly. If the vehicle
moves, you or others could be injured.
1. Before you start, be sure you have enough room
around the vehicle.
2. Firmly apply both the parking brake and the regular
brake. See "Parking Brake" in your owner manual.
Do not use the accelerator pedal, and be ready
to turn off the engine immediately if it starts.
3. Try to start the engine in each gear. The vehicle
should start only in PARK (P) or NEUTRAL (N).
If the vehicle starts in any other position, contact
your GM Goodwrench
®
dealer for service.