The Grand Prix was anterior produced by Pontiac in 1962. This means air pressure checks immediately after driving are inaccurate.2. Remove the valve stem cover from your tire. This is the small plastic cap that unscrews.
1. Park and turn off your Grand Prix to rest for up to an hour after driving before checking tire pressure. Your tires gain air pressure while they heat up during driving. Its longevity is in no diminutive detail owing to the carefulness its owners settle into it. While checking oil and getting tune-ups may be moment being, Grand Prix owners may sometimes lay safety and performance at risk by not checking the tire pressure. This simple task can save your car gas miles and prevent blown out tires.
Instructions
These caps keep moisture and dirt from the valve stems. If your Grand Prix does not have caps, it is a smart idea to purchase a new set.
3. Place the open end of your gauge snugly over the valve stem until you no longer hear air escaping. You now have a tight seal and are getting an accurate read. The gauge pin will pop out or the dial will turn to the amount of pressure you have in the tire.
4. Inspect your tire's pressure and then compare it to your manufacturer's recommended pressure. Pontiac recommends you have at least 26 psi and not more than 36 psi in your Grand Prix tires.
5. Increase or decrease air based on whether your tire falls above or below the recommended range.
6. Put the caps back on your tires.
