Research 1998 Pontiac Grand Prix specs for the trims available. Choose the desired trim / style from the dropdown list to see the corresponding specs.

GT 2dr Coupe GT


Rear Drum Diam x Width (in)
Brake Type Power
Disc - Front (Yes or ) Yes
Disc - Rear (Yes or ) Yes
Front Brake Rotor Diam x Thickness (in) 10.8 x 1.26
Rear Brake Rotor Diam x Thickness (in) 10.9 x 0.43
Drum - Rear (Yes or )
Brake ABS System 4-Wheel

Cargo Area Dimensions

Trunk Volume (ft³) 16.0

Cooling System

Total Cooling System Capacity (qts) 10.2


Cold Cranking Amps @ 0° F (Primary) 690
Cold Cranking Amps @ 0° F (Primary) 770
Maximum Alternator Capacity (amps) 105


Engine Type Gas V6
Engine Order Code L67
Engine Order Code L36
Displacement 3.8L/231
Fuel System Supercharged SFI
Fuel System SFI
SAE Net Horsepower @ RPM 240 @ 5200
SAE Net Horsepower @ RPM 195 @ 5200
SAE Net Torque @ RPM 280 @ 3200
SAE Net Torque @ RPM 230 @ 4000

Exterior Dimensions

Liftover Height (in) 30.9
Track Width, Front (in) 61.7
Track Width, Rear (in) 61.1
Height, Overall (in) 54.7
Width, Max w/o mirrors (in) 72.7
Length, Overall (in) 196.5
Wheelbase (in) 110.5
Min Ground Clearance (in) 5.5

Fuel Tank

Fuel Tank Capacity, Approx (gal) 18.0

Interior Dimensions

Front Hip Room (in) 55.7
Front Shoulder Room (in) 58.5
Front Leg Room (in) 42.4
Front Head Room (in) 38.3
Second Head Room (in) 36.5
Passenger Capacity 5
Passenger Capacity 6
Passenger Volume (ft³) 94.1
Second Hip Room (in) 54.3
Second Shoulder Room (in) 57.9
Second Leg Room (in) 36.1


EPA Fuel Economy Est - Hwy (MPG) 30
EPA Fuel Economy Est - Hwy (MPG) 27
EPA Fuel Economy Est - City (MPG) 19
EPA Fuel Economy Est - City (MPG) 18


Turning Diameter - Curb to Curb (ft) 37.0
Turning Diameter - Wall to Wall (ft) - TBD -
Lock to Lock Turns (Steering) 2.6
Steering Type Variable-Effort Power Rack & Pinion
Steering Ratio (:1), Overall 15.2


Vehicle Name Pontiac Grand Prix
Body Style 2 Door Coupe GT


Suspension Type - Front MacPherson Strut
Suspension Type - Rear Tri-Link
Suspension Type - Front (Cont.) w/Coil Springs
Suspension Type - Rear (Cont.) w/Coil Springs
Shock Absorber Diameter - Front (mm) 32
Shock Absorber Diameter - Rear (mm) 32
Stabilizer Bar Diameter - Front (in) 1.18
Stabilizer Bar Diameter - Rear (in) 0.68


Front Tire Order Code QVG
Front Tire Order Code QNX
Rear Tire Order Code QVG
Rear Tire Order Code QNX
Spare Tire Order Code
Front Tire Size P225/60R16
Rear Tire Size P225/60R16
Spare Tire Size T125/70D15


Wt Distributing Hitch - Max Tongue Wt. (lbs)
Dead Weight Hitch - Max Trailer Wt. (lbs)
Dead Weight Hitch - Max Trailer Wt. (lbs) 1000
Dead Weight Hitch - Max Tongue Wt. (lbs)
Dead Weight Hitch - Max Tongue Wt. (lbs) 100
Wt Distributing Hitch - Max Trailer Wt. (lbs)


Drivetrain Front Wheel Drive
Sixth Gear Ratio (:1)
Fifth Gear Ratio (:1)
Fourth Gear Ratio (:1) 0.71
Third Gear Ratio (:1) 1.00
Second Gear Ratio (:1) 1.57
First Gear Ratio (:1) 2.92
Trans Description Cont. Again Electronic
Trans Description Cont. Automatic w/OD,
Trans Type 4
Trans Order Code
Final Drive Axle Ratio (:1) 3.29
Final Drive Axle Ratio (:1) 2.93
Clutch Size (in)
Reverse Ratio (:1) 2.39


EPA Classification Mid-Size

Weight Information

Base Curb Weight (lbs) 3383


Rear Wheel Material Aluminum
Spare Wheel Material - TBD -
Front Wheel Size (in) 16 x 6.5
Rear Wheel Size (in) 16 x 8
Rear Wheel Size (in) 16 x 6.5
Front Wheel Size (in) 16 x 8
Spare Wheel Size (in) 15 x 4
Front Wheel Material Aluminum