1973 Pontiac Grand Prix SJ 455: The Most Desirable Colonnade Grand Prix, In A Soulful Shade of Blue

Right front 3q view of a Regatta Blue 1973 Pontiac Grand Prix SJ with Rally II wheels

With its flared fenders and sculpted hood, the flamboyant 1973–1977 Pontiac Grand Prix remains a love-it-or-hate-it design. It sold more than 856,000 cars in five years, but some Pontiac fans still find it far too overwrought. Wherever you stand on that question, if you had to pick one mid-’70s GP, it would be hard to find a more desirable one than this all-original, ultra-low-mileage Regatta Blue 1973, a rare SJ model with the 455, handling package, bucket seats, and air conditioning.

Right side view of a blue 1973 Pontiac Grand Prix
1973 Pontiac Grand Prix SJ in Regatta Blue with a blue Cordova vinyl roof / Bring a Trailer

Although it sold quite well in this generation, the Grand Prix was a runner-up in the ferocious personal luxury car battles that raged throughout the 1970s. The one to beat for sheer volume was the Chevrolet Monte Carlo, which was similarly flamboyant, but cheaper; the one to beat in terms of profit margins was the Lincoln Continental Mark series; and the all-around winner on both fronts was probably the 1977–1979 Ford Thunderbird.

Bar graph showing Pontiac Grand Prix model year production for 1973 to 1977, divided by trim level

By comparison, the Grand Prix had a pretty uneven decade. The redesigned “Colonnade” version started off well for 1973, but as the above graph illustrates, the oil embargo hit the GP hard in 1974, and the hangover lingered into 1975. The Grand Prix then recovered strongly with the facelifted 1976–1977 models, which sold spectacularly well: 516,521 cars in just two years.

Right front 3q view of a red 1977 Pontiac Grand Prix two-door hardtop
1977 Pontiac Grand Prix SJ in Firethorn Red with a white Landau top / Orlando Classic Cars

Strictly from an exterior styling standpoint, the 1976–1977 cars might have the edge — contemporary buyers certainly thought so, and I think I do too.

Front view of a 1973 Grand Prix
1973 Pontiac Grand Prix in Regatta Blue with bumper guards on the new 5-mph bumpers / Bring a Trailer

The front end of the ’73 was very similar to the 1972 except for the new grille, and I think its single headlights looked a tad vacant in the broad space on either side of the split grille. The quad rectangular headlights of the 1976–1977 cars seemed better integrated.

Rear window and vinyl top of a 1973 Grand Prix
1973 Pontiac Grand Prix with blue Cordova top and electric rear defogger — still a novel option in those days / Bring a Trailer

A modern buyer might also prefer to skip the Cordova vinyl roof, although it was getting hard to avoid: Almost 80 percent of 1973 Grand Prix production had this $116 option. However, this 1973 Grand Prix SJ wins points for its very attractive Regatta Blue metallic paint — still original in this well-maintained low-mileage car.

455 engine in a blue Grand Prix
1973 Pontiac Grand Prix SJ with the standard 455-4V engine / Bring a Trailer

Whatever you might think about the 1973 front end treatment compared to earlier and later iterations, the ’73 Grand Prix had some other compensating virtues. A big one was performance: This was close to the last gasp for any real performance pretensions in the Grand Prix. The big 455-cid V-8 remained available through 1976, but the 1974 and later cars were heavier, and from 1975 on, the big engine was down to 200 net horsepower. For 1973, the 455 still had 250 net horsepower and 370 lb-ft of torque, which wasn’t ’60s muscle car stuff, but was enough to give this 4,300 lb car respectable punch. Sadly, while Pontiac originally announced that the hotter SD 455 engine would be available on the Grand Prix in 1973, boasting 295 hp, no GPs were actually built with that engine.

"SJ Grand Prix" badges on the right front fender of a blue Grand Prix
1973 Pontiac Grand Prix SJ in Regatta Blue / Bring a Trailer

The $379 SJ option was a performance package that included not only the big engine, but also a retuned suspension with special shock absorbers, front and rear anti-roll bars, and GR70-15 radial tires. Variable-ratio power steering was standard on the Grand Prix, as were power brakes with front discs. As long as you respected the car’s considerable size, it could handle and stop respectably well, which sadly hadn’t been true of a lot of its ’60s predecessors. Unfortunately, buyer interest in sporty performance was no longer great, hit hard by high prices and higher insurance rates: Only 13.4 percent of 1973 GPs (20,749 cars) had the SJ option. All had Turbo Hydra-Matic — while the Le Mans and GTO were still available with a 4-speed manual transmission in 1973, the Grand Prix had been automatic-only since 1972. This car also has a Safe-T-Track limited-slip differential, which was rather rare on the GP; only 8.2 percent of ’73s were so equipped.

Rally II steel wheel with whitewall tires
Both whitewalls and Rally II wheels were optional extras / Bring a Trailer

The popular Rally II styled steel wheels were a $37 option. I give the previous owner a lot of credit for sticking with the factory wheels and period-correct whitewall tires rather than the obligatory aftermarket rims and RWL tires so many of these cars now sport.

Left side view of a 1973 Grand Prix
1973 Pontiac Grand Prix SJ in Regatta Blue with a blue Cordova vinyl roof / Bring a Trailer

Part of the reason the Grand Prix didn’t sell as well as the contemporary Chevrolet Monte Carlo was that the Pontiac cost quite a bit more. A base Grand Prix started at $4,559.90, while a Monte Carlo S started at only $3,561.50. Of course, Chevrolet still charged extra for the Turbo Hydra-Matic transmission almost everyone bought, but a well-equipped Grand Prix was not an inexpensive car: This one listed for $6,098.90 with destination charge (the equivalent of about $50,350 in 2026 dollars), and the original buyer could have added another $700 or so of additional options this car lacks, like the $325 power sunroof.

Driver's door trim of a 1973 Grand Prix
1973 Pontiac Grand Prix with blue all-Morrokide interior and remote outside mirror / Bring a Trailer

However, where the Monte Carlo was pretty much just a Chevelle inside, often with bench seats, the Grand Prix had an interior more befitting its price, including real wood veneer on the dashboard, console, and doors. You could order a front bench seat for a $50 credit, but buckets and console were still standard.

Dashboard and steering wheel of a 1973 Grand Prix
1973 Pontiac Grand Prix SJ with bucket seats and blue all-Morrokide interior / Bring a Trailer

The wood — “genuine African crossfire mahogany,” according to the brochure — helps to keep the blue-on-blue interior color scheme from becoming too overpowering. Personally, I think it’s a good combination, as are the options. This car has manual air conditioning and an AM/FM radio with a power antenna, but it’s not gadget-heavy: no power windows or locks, no power seat, no automatic level control, and no automatic climate control to malfunction in expensive ways.

Front bucket seats and console of a 1973 Grand Prix
1973 Pontiac Grand Prix SJ with bucket seats and blue all-Morrokide interior / Bring a Trailer

The upholstery is Morrokide (expanded vinyl), not leather (although Pontiac had offered real leather on the GP before and would again later), but it is attractive.

Instrument panel of a 1973 Grand Prix, seen through the steering wheel rim
1973 Pontiac Grand Prix SJ had gauges for coolant temperature, oil pressure, and voltage, plus a rally clock / Bring a Trailer

The Model SJ included a full set of secondary gauges, which were optional on base models. Even with the compulsory Turbo Hydra-Matic, I think I’d prefer a tachometer to the rally clock, but the options list suggests that a factory tach wasn’t available in 1973.

Shoulder belt storage pocket in the headliner of a 1973 Grand Prix
1973 Pontiac Grand Prix with deluxe seat belts and separate torso strap / Bring a Trailer

One sour note is the clumsy separate shoulder belts. I wonder if some of Americans’ hostility towards seat belts (fewer than 20 percent wore them in their era when this car was new) might have been alleviated if Detroit had been quicker to adopt modern three-point belts with inertia reels, which are a lot more convenient.

Back seat of a 1973 Grand Prix
1973 Pontiac Grand Prix with blue all-Morrokide interior / Bring a Trailer

You didn’t buy a car like this to regularly carry more than one passenger, but if your friends (or your kids) were young and limber, the back seat wasn’t too awful for a quick run to the pizza parlor. There wasn’t enough room in the trunk for longer trips anyway.

Left front 3q view of a 1973 Grand Prix
1973 Pontiac Grand Prix SJ in Regatta Blue with a blue Cordova vinyl roof / Bring a Trailer

Many of the people who’d made Pontiac the envy of the industry in the ’60s were long gone by 1973: Bunkie Knudsen was running White Motor Company; Pete Estes was GM’s executive vice president; John DeLorean had recently been promoted from general manager of Chevrolet to GM group VP (although he would resign in April 1973); and ad man Jim Wangers was running a Chevrolet dealership in Milwaukee. However, the 1973 Grand Prix SJ still had a fair measure of the spirit and style that had made Pontiac great in the previous decade, something that was becoming awfully scarce at Pontiac in the ’70s. The GP looked good in an extroverted sort of way; it went pretty well; and in SJ form, it had verve as well as luxury — probably the best combination of all those qualities of any ’70s Grand Prix, and arguably of any ’70s Pontiac save the Firebird.

Right rear 3q view of a 1973 Grand Prix
1973 Pontiac Grand Prix SJ in Regatta Blue with a blue Cordova vinyl roof / Bring a Trailer

The original owner of the Regatta Blue car bought it at Ernie Von Schledorn Pontiac in Menomonee Falls, Wisconsin (“Ernie Von Schlay-Dooorn / In the heart of Menah-mo-nee Falls,” as their radio jingle used to go). By late 1973, when the oil embargo started and gas prices spiked, ordering big 455 engine probably no longer seemed like a such a great idea; Consumer Guide called these cars’ gas mileage “decidedly bleak,” at 9.5 to 12 mpg. Perhaps that was why the original buyer had only put about 6,900 miles on the GP by October 1987, when an Ernie Von Schledorn salesman put him in touch with the collector who eventually bought the car from him.

Closeup of the speedometer and odometer of a 1973 Grand Prix
Just 7,274 miles on the clock / Bring a Trailer

That second owner admitted he also spent “more time waxing the car than driving it”: This Grand Prix still had only 7,274 miles when it sold for $23,500 on Bring a Trailer in October 2024, and is still mostly original.

Rear view of a 1973 Grand Prix
1973 Pontiac Grand Prix SJ in Regatta Blue with a blue Cordova vinyl roof / Bring a Trailer

I admit this isn’t my favorite Grand Prix (I’m still partial to the 1963), but it IS my favorite color. In this condition, with this combination of features, it’d be awfully hard to resist, and on balance, it might be peak ’70s Pontiac.

 

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