Specifications
Pontiac Grand Am
Pontiac Grand Am factory specifications: 28 sourced across 3 model years, 1973–1975.
28 specifications · 4 sources
1973
| Measure | Value | Applies to |
|---|---|---|
| Wheelbase | 112 in | Grand Am coupe as tested by R&T |
| Front anti-roll bar diameter | 1.12 in | Radial Tuned Suspension |
| Rear anti-roll bar diameter | 0.94 in | Radial Tuned Suspension |
| Overall length, 2-door / 4-door | 208.6 / 212.6 in | Grand Am |
| Overall width | 77.7 in | Grand Am 2-door and 4-door |
| Overall height, 2-door / 4-door | 52.9 / 54.3 in | Grand Am |
| Wheelbase, 4-door | 116 in | Grand Am 4-door Colonnade hardtop (2-door 112.0) |
| Track, front / rear | 61.9 / 61.1 in | Grand Am |
| Trunk capacity | 15.1 cu ft | Grand Am 2-door and 4-door |
| Fuel tank | 25 gal | Grand Am |
| Tires and wheels | GR70-15 steel-belted radial black sidewall on 7-inch-wide wheels | Grand Am standard |
| Axle ratios by power team | 400 2-bbl + Turbo Hydra-matic 3.08 standard (2.93 economy, 3.23 with air); 400 4-bbl + Turbo Hydra-matic 3.42 (3.08 economy, 3.23 with air); 400 4-bbl + 4-speed 3.42 (3.23 economy/air); 455 4-bbl + Turbo Hydra-matic 3.23 (3.08 economy); SD 455 4-bbl (2-door only) + Turbo Hydra-matic or 4-speed 3.42 :1 | Grand Am 1973 as advertised |
| Brakes and steering | Power front disc / rear drum brakes; variable-ratio power steering; front and rear stabilizer bars 1.12 in / 0.94 in | Grand Am standard |
1974
| Measure | Value | Applies to |
|---|---|---|
| Power teams | Standard 400 2-bbl V-8 with Turbo Hydra-matic; available 400 4-bbl and 455 4-bbl V-8s; 4-speed manual floor shift available with the 400 4-bbl only and not in California | Grand Am 1974 as advertised |
| Overall length, 2-door / 4-door | 210.9 / 214.9 in | Grand Am |
| Overall width | 77.7 in | Grand Am |
| Wheelbase, 2-door / 4-door | 112.0 / 116.0 in | Grand Am |
| Track, front / rear | 61.9 / 61.1 in | Grand Am |
| Fuel tank | 25 gal | Grand Am |
| Chassis | Radial Tuned Suspension; GR70-15 steel-belted radials on 7-inch wheels; front and rear stabilizer bars 1.12 in / 0.81 in; Pliacell shocks; power front disc brakes; variable-ratio power steering | Grand Am standard |
1975
| Measure | Value | Applies to |
|---|---|---|
| Compression ratio | 7.6 :1 | 1975 engines as described |
| Power teams | Standard 400 2-bbl V-8 (400 4-bbl in California); available 400 4-bbl and 455 4-bbl V-8s; standard Turbo Hydra-matic | Grand Am 1975 as advertised |
| Overall length, 2-door / 4-door | 211.0 / 215.0 in | Grand Am |
| Overall width | 77 in | Grand Am |
| Wheelbase, 2-door / 4-door | 112.0 / 116.0 in | Grand Am |
| Track, front / rear | 61.6 / 61.1 in | Grand Am |
| Fuel tank | 25 gal | Grand Am |
| Maximum Mileage System | Unleaded fuel, High Energy Electronic Ignition, catalytic converter, improved torque converter, GR70-15 GM-specification steel-belted radials | Grand Am 1975 standard |
Each year's heading links to that model year's full fact sheet. Specification labels are carried as recorded and not normalized across years, so the same measure may be worded differently from one year to the next.