Factors such as maintenance, temperatures, driving speeds, vehicle loading, and road conditions affect the wear rate of the tires.
Treadwear indicators are one way to tell when it is time for new tires.
Treadwear indicators appear when the tires have only 1.6mm (1/16 in) or less of tread remaining. See Tire Inspection on page 10-48 and Tire Rotation on page 10-48.
The rubber in tires ages over time.
This also applies to the spare tire, if the vehicle has one, even if it is never used. Multiple factors including temperatures, loading conditions, and inflation pressure maintenance affect how fast aging takes place. GM recommends that tires, including the spare if equipped, be replaced after six years, regardless of tread wear. The tire manufacture date is the last four digits of the DOT Tire Identification Number (TIN) which is molded into one side of the tire sidewall. The first two digits represent the week (01–52) and the last two digits, the year. For example, the third week of the year 2010 would have a four-digit DOT date of 0310.
Vehicle Storage
Tires age when stored normally mounted on a parked vehicle. Park a vehicle that will be stored for at least a month in a cool, dry, clean area away from direct sunlight to slow aging. This area should be free of grease, gasoline, or other substances that can deteriorate rubber.
Parking for an extended period can cause flat spots on the tires that may result in vibrations while driving. When storing a vehicle for at least a month, remove the tires or raise the vehicle to reduce the weight from the tires.
Cleaning High Gloss Surfaces and Vehicle Information and Radio Displays
For vehicles with high gloss surfaces or vehicle displays, use a microfiber cloth
to wipe surfaces.
Before wiping the surface with the microfiber cloth, use a soft bristle brush
to remove dirt that could scratch the surface. Then use the microfiber cloth by
gently rubbing to clean. Never use ...
Replacing LATCH System Parts After a Crash
Warning
A crash can damage the LATCH system in the vehicle. A damaged
LATCH system may not properly secure the child restraint, resulting in serious injury
or even death in a crash. To help make sure the LATCH system is working properly
after a crash, see your dealer to have the system inspec ...
Replacing Airbag System Parts after a Crash
Warning
A crash can damage the airbag systems in the vehicle.
A damaged airbag system may not work properly and may not protect you and your
passenger(s) in a crash, resulting in serious injury or even death. To help make
sure the airbag systems are working properly after a crash, have them in ...