Single-Owner 1970 Pontiac Grand Prix SJ

Description

The 1970 Pontiac Grand Prix SJ was a revelation in the personal luxury car segment, blending muscle car performance with upscale styling. Introduced as part of the second generation that began in 1969, the Grand Prix SJ was the high-performance variant of the Model J, inspired by the naming conventions of the 1930s Duesenberg automobiles, and the long hood, short deck design, and distinctive pointed grille, had hints of those classics. 

Built on a unique 118-inch wheelbase version of GM’s A-body platform, the 1970 Grand Prix was essentially a stretched GTO. The SJ trim came standard with a 370-horsepower 455 cubic inch V8 engine, replacing the 428 from the previous year, and offered a Turbo Hydra-Matic transmission, performance suspension, and upgraded interior appointments. 

Luxury touches included woodgrain trim, bucket seats, and a center console, while optional features like power accessories and air conditioning made it a comfortable cruiser. The 1970 model also featured minor styling updates from 1969, such as revised taillights and grille detailing. 

With the heart and soul of a GTO under the longest hood ever on an American car, the 1970 Grand Prix was another major hit in John DeLorean’s playbook. No wonder this SJ is still under the care of the original owner. 

Highlights 

• Well maintained original owner 1970 Pontiac Grand Prix SJ 

• 455 cu-in V8 rated at 370 horsepower 

• Turbo Hydra-Matic three-speed automatic transmission 

• Finished in Polar White (10) over optional Black leather interior 

• Optional air conditioning 

• The chassis number (276570P220769) decodes as:  

  • 2 – GM Division: Pontiac 

  • 76 – Series/Model: Pontiac Grand Prix 

  • 57 – Body Style: two-door hardtop coupe 

  • 0 – Model Year: 1970 

  • P – Assembly Plant: Pontiac, Michigan 

  • 220769 – Sequential Production Number 

Features 

• Minor engine work (rebuilt heads) 

• Front fenders replaced due to rusting at quarter panel 

• Hood has been stripped and repainted due to paint crazing 

• Other body work has been done as needed 

Known Imperfections 

• Air conditioning does not work 

• Slight transmission fluid leak 

• Repairable seam spilt in the driver’s seat 

• Rust spot inside passenger side door frame, lower left side of frame 

Included 

• Owner’s manual 

• Keys 

Ownership History 

The consignor, the original owner of this 1970 Pontiac Grand Prix SJ, says, “It was purchased in March 1970, and has been garage kept since day one. While never restored, it has been exceptionally maintained. The interior is all original except for the aftermarket 8 Track player. Maintenance logbook, starting at 38k miles is available.”