Pontiac Grand Prix 2007 Owner's Manual page 432

If the flat tire is due to a slow leak caused by a nail
or other similar road hazard, the tire inflator kit may
be used to temporarily repair the damaged tire.
After temporarily repairing a tire using the tire
inflator kit, it is recommended to take your
vehicle to your dealer/retailer within 100 miles
(161 kilometers) of driving to have the tire inspected
and repaired. If the sealant is not removed from the
tire within a 100 miles (161 kilometers) of driving,
it is more likely that the tire and tire pressure
monitoring sensor may get damaged and have
to be replaced.
Accessing the Tire Inflator Kit
To access the tire inflator kit:
1. Open the trunk. See Trunk on page 97 for
more information.
2. Locate the tire inflator kit by lifting up the
carpet.
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4. Remove the inflator kit by pulling it straight
out of the foam container.
3. Remove the inflator
kit cover by turning
the center nut
counterclockwise.