A relatively minor restyling marked the 1970 Cadillac Calais. A facelift included a grille with 13 vertical blades set against a delicately cross-hatched rectangular opening. The bright metal headlamp surrounds were bordered with body color to give a more refined look. Narrow, vertical "vee" taillights were seen again, but no longer had smaller V-shaped bottom lenses pointing downward below the bumper. Wheel discs and winged crest fender tip emblems were new. A Calais signature script was placed above the rear end of the horizontal lower belt molding, just ahead of the chromed taillight dividers.
Standard equipment included Turbo Hydramatic transmission; power steering; front disc brakes; power windows; center front arm rest; electric clock; two front cigarette lighters; twin front and rear ash trays; complete interior and exterior courtesy lamps; safety, warning, and convenience lights; outside remote control lefthand mirror; visor vanity mirror; and L78-15 bias fiberglass blackwall tires.
| Vehicle identification numbers were stamped on the top of the instrument panel this year and were visible through the windshield |
| The first symbol was a "6" for Cadillac |
| The second and third symbols correspond to the same symbols in the series code number |
| The fourth and fifth symbols correspond to the last two symbols in the standard Fisher Body Division code (Style Number without letter suffix) |
| The Sixth symbol was an "0" for 1970 model year |
The seventh symbol was an assembly plant code as follows:
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| The next group of six numbers was the sequential unit production code |
| The number sequence began with 100001 at each assembly plant |
| Body Style Numbers, on the vehicle data plate (located on firewall) were prefixed with "70" for 1970 and suffixed with a single letter, which also indicated series and model and corresponds to the letter on the charts below |
| Model No. | Style Number | Body Type | Seating | Factory Price | Shipping Weight | Production Total |
|---|---|---|---|---|---|---|
| 70-682 | 68249N |
4-door Hardtop Sedan | 6 | $5813 | 2127 kg | 5,187 |
| 70-682 | 68247G |
2-door Hardtop Coupe | 6 | 5637 | 4620 | 4,724 |
| Engine type | Overhead valves |
| Block | Cast iron block |
| Bearings | Five main bearings |
| Valve Lifters | Hydraulic valve lifters |
| Displacement | 7.7 Litres |
| Bore and stroke | 109.2mm x 103.1mm |
| Compression ratio | 10.0:1 |
| Brake horsepower | 375 hp @ 4400 rpm |
| Power | 280 kW @ 4400 rpm |
| Torque | 525 ft. lbs @ 3000 rpm |
| Torque | 712 Nm @ 3000 rpm |
| Oil pressure | 35-40 psi |
| Carburetor | Rochester four-barrel Quadrajet Model 4MV |
| Wheelbase | 3289mm |
| Overall length | 5715mm |
| Tires | L-78x15 |