At least once a month, At least once a year, At least once a month -10 at least once a year -10 – GMC 2009 Sierra User Manual
Page 438: Caution
At Least Once a Month
Tire Inflation Check
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 5-65. Check to make sure the spare tire is stored
securely. See Changing a Flat Tire on page 5-81.
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 5-72.
At Least Once a Year
Starter Switch Check
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CAUTION:
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 on page 2-32.
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
dealer/retailer for service.
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