For 1985, Grand Prix's now included a new checkerboard grille design, as well as an optional two tone paint scheme with a fading body stripe.
The octagonal 'GP' logo also returned to the taillights.
1985 marked the last year for the flat rear deck panel in the interior, as by 1986 laws mandated cars to have a third brake light installed.
New rectangular digital ETR stereo system options were introduced and replaced the dial pushbutton stereos.
Some more rarer options specific for the 1985 Pontiac Grand Prix include a factory rear spoiler, rare aluminum turbo finned wheels, and a full size spare tire.
The standard engine for 1985 was the 110 hp (82 kW) Buick built 3.8 L V6 with a 150 hp (110 kW) Chevy 5.0 L V8 optional.
The 5.7 L Olds Diesel V8 was dropped from the option list.
Equipment levels were Standard, LE, and Brougham.

An ad for the 1985 GP promoted the fact that its instrument panel still used dials for gauges.
It was highlighted by a question similar to one long used in advertisements for Dial soap since the late 1950s, "Aren't You Glad We Use Dials.
Don't You Wish Everybody Did?"
For 1985, Grand Prix's now included a new checkerboard grille design, as well as an optional two tone paint scheme with a fading body stripe. The octagonal 'GP' logo also returned to the taillights. 1985 marked the last year for the flat rear deck panel in the interior, as by 1986 laws mandated cars to have a third brake light installed. New rectangular digital ETR stereo system options were introduced and replaced the dial pushbutton stereos. Some more rarer options specific for the 1985 Pontiac Grand Prix include a factory rear spoiler, rare aluminum turbo finned wheels, and a full size spare tire. The standard engine for 1985 was the 110 hp (82 kW) Buick built 3.8 L V6 with a 150 hp (110 kW) Chevy 5.0 L V8 optional. The 5.7 L Olds Diesel V8 was dropped from the option list. Equipment levels were Standard, LE, and Brougham.
An ad for the 1985 GP promoted the fact that its instrument panel still used dials for gauges. It was highlighted by a question similar to one long used in advertisements for Dial soap since the late 1950s, "Aren't You Glad We Use Dials. Don't You Wish Everybody Did?"
Pontiac Grand Prix