Squarebody 101


New member
Apr 20, 2019
Let's start with some background data.

The 'Squarebody' GM truck, Chevrolet and GMC, was produced from 1973 to 1987 with the exception of the Crew Cab (C/K-30 four-door cab), Blazer, Jimmy, and Suburban versions, which continued up until the 1991 model year. GM ended this generation with 1987 as this was the last model year for the conventional cabs (two-door cab).

For the body itself, the major change in the Squarebody line occurred in 1981, when GM introduced design changes to pursue increased fuel efficiency. The hood, grille and fender design evolved, and window glass was made thinner, all to reduce weight of the trucks.

A new horizontally-aligned four-halogen-headlight grille was introduced in 1989 to tie the legacy body style into the new, rounded body style introduced in 1988. For the interior, the big change was the dash opening made larger to fit a 1.5-DIN radio in place of the two-knob variety in use since 1973.

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New member
Apr 15, 2019
Very well said. I'm pretty shore mine has parts from the hole spectrum lol