The 1991 Pontiac Grand Prix tire size depends on trim: the GT, 3.4 X, Automatic takes P215/60R15; the GT, 3.1 T takes P215/60R15; the GT, 3.4 X, Standard takes P215/60R15; the LE, 2.3 D, 125C/MD9 takes P205/70R15; the LE, 2.3 D, 3T40/MD9 takes P205/70R15; the LE, 3.1 T takes P205/70R15; the SE, 2D Coupe, 2.3 D, 125C/MD9 takes P205/70R15; the SE, 2D Coupe, 2.3 D, 3T40/MD9 takes P205/70R15; the SE, 2D Coupe, 3.1 T takes P205/70R15; the SE, 2D Coupe, 3.4 X, Automatic takes P205/70R15; the SE, 2D Coupe, 3.4 X, Standard takes P205/70R15; the SE, 4D Sedan, 2.3 D, 125C/MD9 takes P205/70R15; the SE, 4D Sedan, 2.3 D, 3T40/MD9 takes P205/70R15; the SE, 4D Sedan, 3.1 T takes P205/70R15; the SE, 4D Sedan, 3.4 X takes P205/70R15; the STE, 3.1 T takes P215/60R16; the STE, 3.4 X, Automatic takes P215/60R16; the STE, 3.4 X, Standard takes P215/60R16, per the factory service manual.
Where to Buy & Install Tires for Your 1991 Pontiac Grand Prix
Worried about mounting? You don't need to haul tires in your trunk. Choose direct-to-installer delivery, mobile installation at your home, or front-door delivery:
⭐ Recommended · Ship to Local Shop
Tire Rack
Zero-hassle installation network across the US.
✓Free delivery to 10,000+ local shops (Firestone, Discount Tire & local mechanics)
✓Mobile installation vans available — they mount & balance in your driveway
✓Free 2-year road hazard warranty included on most eligible tires
✓Pre-set, guaranteed installation rates — no surprise shop markups