You MUST check the sticker on your driver's side doorjamb. This sticker will show the recommended tire pressure for your specific Grand Am and its tire sizes. This is the most reliable source of information.
The sticker will likely provide two numbers: one for the front tires and one for the rear tires (they might be the same). It might also list different pressures for normal driving vs. heavier loads.
Ignoring the sticker and using a generic pressure is dangerous and can lead to:
* Reduced fuel economy: Underinflation significantly impacts fuel efficiency.
* Uneven tire wear: This leads to premature tire replacement.
* Reduced handling and braking: Improper inflation affects the car's ability to handle and stop effectively.
* Increased risk of a blowout: Overinflation or underinflation increases this risk.
In short: Don't guess. Check the sticker on your driver's side doorjamb. That's the only definitive answer for your 1996 Grand Am.
