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1973 Grand Prix >> Full Aftermarket System >> Parts & Restoration

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1973 Pontiac Grand Prix Air Conditioning

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1973 Pontiac Grand Prix

1973 Pontiac Grand Prix | Front

1973 Pontiac Grand Prix | Front

1973 Pontiac Grand Prix | Side

1973 Pontiac Grand Prix | Side

1973 Pontiac Grand Prix | Side

1973 Pontiac Grand Prix | Rear

1973 Pontiac Grand Prix | Rear

1973 Pontiac Grand Prix | Rear

1973 Pontiac Grand Prix | Interior

1973 Pontiac Grand Prix | Interior

1973 Pontiac Grand Prix | Engine

1973 Pontiac Grand Prix | Engine

INFORMATION on the 1973 Pontiac Grand Prix

Factory A/C Specs Overview Stats & Specs

About the OEM Factory Air Conditioning System Originally Installed on the 1973 Grand Prix

AC System Type:

Split year design. 1st: Expansion ’ POAValve-Filter Drier. 2nd: VIR (Valves-in-Receiver) system, which combines the expansion valve, POA valve & accumulator in one valve. Electric & vacuum controls in each version. No safety switch in this factory system, which relied instead on discharge outlet on A6 compressor.


Single-groove, GM A6 compressor located on passenger side of engine. Learn more about GM compressors.


Tube and fin. Learn more about GM condensers.


Vacuum & electrically operated manual or automatic controls. Learn more about GM controls.


Located in engine compartment on the passenger side firewall. Learn more about GM evaporators.


Split-year design. 1st with filter-drier mounted next to Condenser on passenger side. Note that the muffler built into the manifold is commonly mistaken for the filter-drier in this vehicle. 2nd version used VIR (Valves-in-Receiver) - Mounted to the Evaporator unit on the passenger side firewall. The VIR combines the expansion valve, POA valve and accumulator in one valve.Learn more about GM filter-driers.


Combination of hose clamps (suction and discharge), pre-crimped liquid hose, and one liquid line. Learn more about GM hoses-lines.


R12. Learn about converting to GM vehicles to 134a.


Split-year design. 1st version Expansion and 15-52 POA Valve. 2nd version used VIR (Valves-in-Receiver). Learn more about GM valves.

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Grand Prix background and what was new in 1973

The Grand Prix as a model

The Pontiac Grand Prix was first introduced in 1962 as Pontiac’s answer to the Ford Thunderbird, slotted as a luxury, performance, mid-size car, between the larger Bonneville and the smaller Tempest in the Pontiac lineup.

The 1973 Grand Prix in context

The 1973 Grand Prix was the first of the A-body based 3rd generation (1973-1977). With the 3rd generation, the Grand Prix still continued its long hood/short deck design but introduced a fixed rear “opera” window and a concave top edge of the door panels.

73 vs 72 Front

In the front. the 1973 Grand Prix was similar to earlier models with a large, vertical slatted grille and headlights set in square bezels. As part of a safety focus, the front bumper was suspended by energy absorbers and vertical struts were added to it. As in earlier models, the turn signals were still cut into the leading edge of the front fenders. One change was that the front split grilles in the beak became distinctly separated by the body panel and the Pontiac “V” logo was placed between them.

73 vs 72 Side

The clean side panels remained but like all of the 3rd generation Grand Prix’s, the 1973 featured a pillared “Colonnade” hardtop (for more rollover protection) with frameless door glass, a downward notched lower glass line and an option for fixed rear “opera” windows. The Grand Prix monogram was printed on the “opera” window.

73 vs 72 Rear

In the rear of the 1973 Grand Prix, the deck’s “V” boat tail was shallower and squarer at the end. The horizontal, integrated-into-the-bumper, taillights on the 1972 were replaced with almost square taillights above the bumper with a clear horizontal band centered between two red ones.

73 vs 72 Other

Two versions of the Grand Prix were offered in 1973, the base model (formerly given the “J” designation) and the sportier, more luxurious SJ, which again featured the larger engine standard. Of the 153,899 produced, 20,749 were SJ. Over 100 lbs of weight were added to the base model and over 500 lbs to the SJ but improved suspension still gave the 1973 Grand Prix good stability and cornering ability. The car proved popular and easily broke the prior Grand Prix production record set back in 1969.

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General Statistics & Specifications on the 1973 Pontiac Grand Prix


3rd Gen (1973 — 1977)

Model No:


Total Production:


“Std” Body Type:


Other Body Types:


“Std” Price:


“Std” Weight:

4,025 lbs

“Std” Wheelbase:

116 in

“Std” Length:

216.6 in

“Std” Engine:

400 V8 250 hp

Other Engines:

455 V8 250-310 hp

Special Trims:


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Note: The “Std” body type, dimension, price, weight and engine is for the best selling base model. Production totals are for all models combined.

Grand Prix Clubs

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Pontiac Clubs

Grand Prix Resources

Rocky Rotella, 1973-1977 Pontiac Grand Prix, High Performance Pontiac, July 2006. (more late model)

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Pontiac Resources

Pontiac History

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