How The 1959 Pontiac’s Split Grille Defined The Brand For The Next 50 Years

Composite photo showing front 3q views of a Sienna Coral 1959 Pontiac Bonneville and a Shelltone Ivory 1960 Pontiac Bonneville, both "bubbletop" hardtop coupes

You could say a lot about the 1959 Pontiac, especially the top-of-the-line Bonneville, but its most lasting legacy was introducing the trademark Pontiac split grille. Although Pontiac nearly abandoned the split grille theme after only one year, it was soon revived, and became Pontiac’s defining stylistic signature for the rest of the brand’s existence. Here’s how that happened.

Front end of a black 2025 BMW 7-Series sedan with oversize twin kidney grilles
2025 BMW 750e xDrive sedan / BMW of San Antonio

Today, if an automaker has a distinctive or memorable grille theme — never mind if it’s good or bad — they will usually ride that theme into the ground, often exaggerating it to the point of absurdity.

Press photo showing a close-up of the grille and nose of a gray 2025 Lexus LS
2025 Lexus LS500 sedan / Lexus, a Division of Toyota Motor Sales, U.S.A., Inc.

A lot of modern high-end vehicles are now more grille than car — an array of black plastic Cheshire Cat grins that linger after the rest of the car has faded from memory. This seems to be by design.

Grille and headlights of a tan 1930 Rolls-Royce Phantom II with brown fenders
1930 Rolls-Royce Phantom II Continental Weymann fixed-head coupé, body by H.J. Mulliner / Motorcar Studios — RM Sothebys

If you want to be charitable, you could call it a throwback to the era of prewar Classics. In Days Gone By™, high-end automakers didn’t necessarily design or make their own bodies (wealthy customers ordered a rolling chassis and commissioned a bespoke body from a coachbuilder), so the radiator shell was the manufacturer’s principal visual trademark, and the surest way to distinguish a Rolls-Royce from a Peerless or a Packard. Today, we usually just call that “branding,” which is something that most automakers, even much less pricey ones, take very seriously.

High-angle rear 3q view of a red 1959 Pontiac Bonneville two-door hardtop with a white roof
1959 Pontiac Bonneville sport coupe in Sienna Coral with a Cameo Ivory roof / Mecum Auctions

Pontiac in the late ’50s was in the midst of the more difficult and complicated process we now call “rebranding.” It had never been a high-end marque, of course — Pontiac was introduced in 1926 as a cheaper companion make for Oakland, and was now second from the bottom on the GM brand/price ladder — but its image had gotten dangerously fusty, and its new general manager, Semon E. “Bunkie” Knudsen, was looking to shake things up.

High-angle front view of a black 1948 Pontiac station wagon with an exterior sun visor
1948 Pontiac De Luxe Streamliner Station Wagon in black / Connors Motorcar Company

From 1935 through the mid-’50s, Pontiac’s principal visual signifier was not its grille, but its “Silver Streak,” a band of chrome strips extending length-wise through the center of the hood and sometimes also the rear deck. These streaks began to split in two for 1953, and became two distinct strips for 1955–1956.

Right front 3q view of a two-tone coral and beige 1956 Pontiac Star Chief station wagon
1956 Pontiac Star Chief Custom Safari in Sun Beige over Camellia Coral / Bring a Trailer

Knudsen thought the streaks “looked like a pair of suspenders.” They were certainly distinctive, but they were also strongly associated with the old, fusty Pontiac, so Knudsen had them removed from the 1957 models at the last minute.

Right front 3q view of a two-tone red and white 1958 Pontiac Bonneville two-door hardtop
1958 Pontiac Bonneville sport coupe in Redwood Copper and Patina Ivory / Premier Auction Group

The problem was that 1957–1958 Pontiac models now lacked visual identity. They had plenty of bling, especially in the pricier trim levels, but so did many mid-market cars of the time, and there wasn’t anything that screamed “This is a new PONTIAC!”

Right front 3q view of a two-tone turquoise 1958 Chevrolet Impala two-door hardtop
1958 Chevrolet Impala sport coupe in Aegean Turquoise with a Tropic Turquoise roof / Connors Motorcar Company

Even with a top-of-the-line Pontiac Bonneville, a careless observer might accidentally compliment the proud new owner on their new Chevrolet Impala, which shared the same Body by Fisher shell and looked quite similar except in detail. The horror!

Front view of a red 1959 Pontiac Bonneville two-door hardtop
1959 Pontiac Bonneville sport coupe in Sienna Coral with a Cameo Ivory roof / Mecum Auctions

That brings us to the 1959 Pontiac, which introduced this dramatic split grille. There’s some dispute about who actually came up with this grille concept: Historian Michael Lamm credits it to earlier Pontiac design studio chief Paul Gillan, noting that Gillan had proposed something similar in 1955 that then-VP of Styling Harley Earl hadn’t liked. Jack Humbert, who joined the Pontiac studio in fall 1958, attributed the twin grille design to his immediate predecessor, studio chief Jack Schmansky, whom Humbert succeeded in March 1959.

Low-angle closeup of the left headlights and fender of a red 1959 Pontiac Bonneville
1959 Pontiac Bonneville sport coupe in Sienna Coral with a Cameo Ivory roof / Mecum Auctions

In any event, the split grille was a very good trick. It was at least as distinctive as the Silver Streaks, it made the front end look even wider than it was (1959 was the first year of Pontiac’s “Wide-Track” advertising theme, an idea proposed by ad agency MacManus, John and Adams that Knudsen initially thought “corny”), and it later proved to be adaptable to a wide range of body designs and shapes.

Right front 3q view of a white 1960 Pontiac Bonneville "bubbletop" two-door hardtop
1960 Pontiac Bonneville sport coupe in Shelltone Ivory / Mecum Auctions

Surprisingly, Knudsen had no particular enthusiasm for the split grille theme, and the 1960 Pontiac — which was finished in all but minor details by the time the 1959 cars went on sale — had already dropped it, with the result seen above.

B&W photo of a low-slung FWD race car with a clean-shaven white man at the wheel and a white man with a hat and mustache standing next to him
Harry Miller (standing) with Harry Hartz in one of Miller’s FWD race cars — date unknown, but probably circa 1927

Recently promoted GM Styling VP Bill Mitchell was reportedly very enthusiastic about the 1960 grille, whose trapezoid-shaped center section was originally supposed to be a visual allusion to the front differential of the Miller FWD race cars of the 1920s.

Left front 3q view of a white 1960 Pontiac Bonneville two-door "bubbletop" hardtop
1960 Pontiac Bonneville sport coupe in Shelltone Ivory / Mecum Auctions

Mitchell had a tendency to become fixated on these kinds of homages to famous prewar cars of his youth, which wasn’t necessarily to his credit. Not all of those designs translated easily to postwar styles or production methods, and while some of the results were impressive, others were regrettable, or just pointless. I’d put the 1960 Pontiac grille in the latter category: Even if someone was familiar with the Miller FWD racers of 35 years earlier, the visual resemblance was so watered-down as to be meaningless, and there was no real connection there. (The Bonneville wasn’t FWD, and wouldn’t be for another 25 years.) The 1960 grille didn’t look bad, but it didn’t look like anything in particular

Right front 3q view of a white 1960 Pontiac Bonneville "bubbletop" two-door hardtop
1960 Pontiac Bonneville sport coupe in Shelltone Ivory / Mecum Auctions

I should emphasize that the ’59 split grille wasn’t dropped because Mitchell or Knudsen disliked it. Planned obsolescence was the name of the game in Detroit, and the lead times of design and tooling meant that any time a new model went on sale, the stylists were probably already working on the successor to its successor. Any number of features were tried and then swiftly discarded in this way. It usually didn’t pay to get too sentimental about such things, although it is surprising that neither Mitchell nor Knudsen recognized the split grille’s potential value as a brand-building element.

Headlights and front bumper of a light blue 1961 Pontiac Bonneville
1961 Pontiac Bonneville sport coupe in Tradewind Blue / Mecum Auctions

Nevertheless, the GM Styling Staff soon realized that the split grille had been too good an idea to simply abandon. “I’m not sure the public cared one way or another, as the ’60 Pontiac sold very well,” explained stylist Dave Holls. “But inside the company, we all lamented the loss of the twin grille. The styling studios felt that way to a man.” Once Humbert became Pontiac chief stylist, he said he “recognized it was such a strong mark that we took it again for 1961.”

Left front 3q view of a light blue 1961 Pontiac Bonneville two-door "bubbletop" hardtop
1961 Pontiac Bonneville sport coupe in Tradewind Blue / Mecum Auctions

So, the split grille reappeared on full-size Pontiacs a year after its disappearance, in new but obviously evolutionary form.

High-angle front view of a black 1961 Pontiac Tempest coupe
1961 Pontiac Tempest Custom Coupe in Regent Black / Bring a Trailer

Pontiac also adapted the theme for the 1961 Tempest Y-body compact, and then repeated its previous pattern by dropping the split grille for 1962, only to restore it to the Tempest a year later.

Front view of a green 1968 Pontiac Bonneville convertible
1968 Pontiac Bonneville convertible in Verdoro Green / Bring a Trailer

After that, Pontiac stylists apparently decided that the split grille was an immutable point of Pontiac brand identity, and it was never really dropped again. It did eventually become more a theme than a specific design: By the late ’60s, for instance, it had evolved into a beak-like prow.

Front view of a black 1974 Pontiac Grand Ville four-door sedan
1974 Pontiac Grand Ville sedan in black / Bring a Trailer

In the ’70s, the split grille on the full-size cars became a slightly V-shaped radiator shell, perhaps reflecting the decade’s fetish for neoclassical styling.

Left front 3q view of a white 1977 Pontiac Grand Prix two-door hardtop
1977 Pontiac Grand Prix SJ in Cameo White with a red Landau top and hatch roof / Orlando Classic Cars

The now midsize Pontiac Grand Prix retained a more formal grille separation through 1977 before adopting a V-shaped grille like the big cars’ for 1978.

Front view of a silver 1982 Pontiac Firebird
1982 Pontiac Firebird Trans Am in Silver Metallic / Bring a Trailer

As Pontiac began to make concessions to the age of aerodynamic styling, the grilles sometimes became slots, or perhaps nostrils.

Front view of a white 1989 Pontiac Grand Prix SE
1989 Pontiac Grand Prix SE Pepsi Special Edition — one of 500 specially trimmed cars for a Pepsi contest / Premier Auction Group

At times, the thread of styling continuity seemed to fray, but it never quite snapped.

Low-angle front view of a white 1990 Pontiac Grand Am SE framed against a bright blue sky
1990 Pontiac Grand Am SE coupe in white / Bring a Trailer

If the twin-grille nose of the popular Grand Am looked more than a little BMW-like, that was fine with Pontiac (though not always with BMW).

Press photo showing the front view of a white 1990 Pontiac LeMans with foglamps on
1990 Pontiac LeMans GSE in white

As GM’s car divisions lost their autonomy and became little more than marketing entities in an increasingly centralized corporation, the split grille became that much more important for Pontiac. It was a recognizable, inexpensive design cue that could be easily added to give a dash of Pontiac identity to even unlikely products, like a Daewoo-built version of the Opel Kadett E, reviving the LeMans name …

Magazine ad for the Pontiac Trans Sport, showing a white van with the headline "Trans Sport. The Pontiac of Minivans!"
1990 Pontiac Trans Sport SE magazine ad

… or a minivan with a notorious resemblance to the Black & Decker DustBuster vacuum cleaner.

Front view of a white 1992 Pontiac Bonneville sedan
1992 Pontiac Bonneville SSE in White Primary / Bring a Trailer

At times, the split grille theme started to feel a little half-hearted. Bisecting the slot-like grille of a ’90s Bonneville SSE/SSEi with the Pontiac emblem always struck me as cheating, as if someone in the Pontiac studio had been pushing hard for a new direction, only to be shot down again late in the development process.

High-angle front view of a silver 2010 Pontiac G6 sedan
2010 Pontiac G6 sedan in Quicksilver Metallic / Biscayne Auto

Pontiac doggedly retained the split grille all the way to the end of the line in 2010. (The last car off the line in January 2010 was a G6 sedan like the one above, though not this one particular car.)

Right side view of a red 1959 Pontiac Bonneville "bubbletop" two-door hardtop with a white roof
1959 Pontiac Bonneville sport coupe in Sienna Coral with a Cameo Ivory roof / Mecum Auctions

Back in 1959, Pontiac did offer a few other features to help to justify its mid-price status — a Bonneville sport coupe like the Sienna Coral car pictured above started at $3,257, a whopping $540 more than a 1959 Impala. On the top-of-the-line Bonneville, these enticements included lots of extra chrome inside and out, bright aluminum seat frames, and additional sound insulation.

Front seat of a 1959 Pontiac Bonneville two-door hardtop with tri-tone white, red, and brown upholstery, seen through the driver's door
1959 Pontiac Bonneville sport coupe with Ivory, Metallic Maroon, and Mahogany Morrokide upholstery / Raleigh Classic Car Auctions

There was also flashy tri-color “Jeweltone Morrokide” upholstery that could make you feel like you were riding in a giant bucket of candy corn, plus a “star-flecked” headliner and carpeting and a fold-down rear armrest (in closed bodies only).

Back seat of a 1959 Pontiac Bonneville two-door hardtop with tri-tone white, red, and brown upholstery, seen through the driver's door
1959 Pontiac Bonneville sport coupe with Ivory, Metallic Maroon, and Mahogany Morrokide upholstery / Raleigh Classic Car Auctions

(The interior shots above are not of the car pictured in the exterior photos, but another in the same color scheme.)

Blue-painted Pontiac 389 Tri-Power engine under the hood of a red 1959 Pontiac Bonneville
389-cid V-8 with optional Tri-Power carburetion and 315 gross horsepower / Mecum Auctions

Even base Catalina buyers got a standard Pontiac 389 V-8, bigger than any Chevrolet engine offered at the time, and only 1 cubic inch short of Cadillac.

Gold "Tri-Power" badge on the fender of a Sienna Coral 1959 Pontiac Bonneville
Tri-Power engine was $90.30 on a 1959 Bonneville with Hydra-Matic / Mecum Auctions

This Bonneville also has Tri-Power carburetion, good for 315 gross horsepower and 0 to 60 times in the mid-8s, but you paid extra for that. (The nifty fender badge alone was worth about half the price premium, if you ask me.)

Hydra-Matic shift quadrant in a 1959 Pontiac Bonneville
Super Hydra-Matic was $231.34 on a 1959 Bonneville, but it was installed on all but 673 cars / Mecum Auctions

You also paid extra for the four-speed Super Hydra-Matic, although very few of these cars went without. Chevrolet still used the two-speed Powerglide, or the rarer and sometimes more troublesome triple-turbine Turboglide. Hydra-Matic was considerably more versatile, with multiple driving ranges that helped you stay in third or second for mountain driving — useful given that the brakes on these cars left much to be desired.

Left front 3q view of a red 1959 Pontiac Bonneville "bubbletop" two-door hardtop with a white roof
1959 Pontiac Bonneville sport coupe in Sienna Coral with a Cameo Ivory roof / Mecum Auctions

However, I think the most essential point was that the Pontiac now looked different from a Chevrolet, or an Oldsmobile, and the split grille had a lot to do with that. In later years, that and a lot of ribbed plastic body cladding were about all Pontiac still had to offer that you couldn’t get on other versions of the same shared GM platforms, but for a while, it was often enough. (The Grand Am used to be everywhere.)

Front view of a gray 2006 Pontiac Grand Prix sedan
2006 Pontiac Grand Prix GXP in Stealth Gray Metallic / Bring a Trailer

My last experience with a newish Pontiac was a week in a late-model rental Grand Prix in 2006. It had the normally aspirated 3800 rather than the LS4 V-8 of the GXP pictured above, but the V-6 gave the GP impressively long legs and surprisingly good high-speed fuel economy, unfortunately combined with dishearteningly cheap furnishings and a who-cares casualness to every visible aspect of its design and finish, which would have put it near the bottom of my shopping list as a new car buyer. (My traveling companion was also none too pleased about the postage-stamp-size “GM” badges on the front fenders after noticing that they were also present on every rental Cobalt we saw, a self-defeating attempt at corporate identity that nobody asked for.)

Right front 3q view of a red 1959 Pontiac Bonneville "bubbletop" two-door hardtop with a white roof
1959 Pontiac Bonneville sport coupe in Sienna Coral with a Cameo Ivory roof / Mecum Auctions

However, that 2006 Grand Prix still had the familiar split grille, and if you squinted a bit, or gave it the spurs on a stretch of smooth Southern asphalt late in the evening, there was still the faintest trace of the old Bunkie Knudsen/Pete Estes/John DeLorean/Jack Humbert swagger that had once made Pontiac such a big deal, once upon a time.

Related Reading

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1959 Pontiac Catalina: No Frills, Jet-Age Wide-Track Survivor – Options? I Hate Options (by Aaron65)

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