MCG Marketplace

1970 Buick GS

General Overview

This was the most exciting year for Buick muscle cars.

GM finally lifted the ban that intermediately sized cars cannot exceed 400ci’s. Therefore, Buick stuffed a brand new 455ci in its newly restyled GS models. The 455 spun a hotter cam with bigger valves and kept the functional hood scoops, sucking up plenty of cold air. The 455s were underrated at 350hp, but an astonishing 510 lb-ft of torque! A Stage 1 option was available with an even hotter cam, bigger valves, and a revised carburetor. Buick rated it at 360hp, but some experts believe that to be closer to 400hp. A new GSX appearance package became available with front and rear spoilers, contrasting body stripes, meaty tires, hood tach, and heavy-duty suspension. One could not get this car in any other color than Saturn Yellow or Apollo White. The GS 350 was still available, but the California GS had been dropped.

Browse 1970 Buick Gs For Sale in The MCG™ Marketplace

Manufacturer Original Sales Brochures


Engine 0 to 60 MPH Quarter Mile Source
455ci/360hp 6.5 sec 13.8 sec @ 101 mph n/a


Available Engines:
GS350 350ci 1x4bbl 315 hp @ 4600 410 lb-ft @ 3200
GS455 455ci 1x4bbl 350 hp @ 4600 510 lb-ft @ 2800
GS455 Stage 1 455ci 1x4bbl 360 hp @ 4600 510 lb-ft @ 2800
Available Transmissions:
  • 3-Speed Manual
  • 4-Speed Manual
  • 350 Auto
  • 400 Auto

Factory Exterior Colors

  • Glacier White
  • Silver Mist Poly
  • Gulfstream Blue Poly
  • Diplomat Blue Poly
  • Aqua Mist Poly
  • Seamist Green Poly
  • Sherwood Green Poly
  • Bamboo Cream
  • Cornet Gold Poly
  • Harvest Gold Poly
  • Desert Gold Poly
  • Burnished Saddle Poly
  • Titian Red Poly
  • Fire Red
  • Burgundy Mist Poly
  • Regal Black

Factory Interior Colors

  • Black
  • Ivory
  • Medium Blue Poly
  • Dark Blue Poly
  • Dark Brown
  • Medium Saddle
  • Dark Saddle
  • Medium Sandalwood
  • Dark Sandalwood
  • Dark Green Poly
  • Medium Red
  • Dark Red

Production Numbers

  • GS350: 2-Dr Hardtop
    Total productions 9,948
  • GS455: 2-Dr Hardtop
    Total productions 8,732
  • GS455: 2-Dr Convertible
    Total productions 1,416

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