Pontiac G8 Guide: GT, GXP, Specs, History, And Ownership
Many car enthusiasts remember the Pontiac brand fondly. It was one of the best brands General Motors had at one point, putting out some of Detroit’s best sports cars and muscle cars. One of those is the Pontiac G8. It’s a muscle sedan with surprising origins, and it’s so rare and unusual in America that a lot of people don’t even know what it is. It was also, sadly, a victim of the harsh realities of the automotive industry.
The Pontiac G8 Is A Sleeper Sedan With True Muscle Car Performance
 24 autotech Model |
Engine |
Transmission |
 17 autotech Drivetrain |
Power |
Torque |
|
Base |
3.6-liter V6 |
5-speed automatic |
Rear-wheel drive |
256 hp |
248 lb-ft |
|
GT |
6-liter V8 |
6-speed automatic |
Rear-wheel drive |
361 hp |
385 lb-ft |
|
GXP |
6.2-liter V8 |
6-speed manual, 6-speed automatic |
Rear-wheel drive |
415 hp |
415 lb-ft |
The Pontiac G8 is one of those cars that a lot of people wouldn’t give a second glance to in public. That’s likely mainly because they either wouldn’t know what it was at all, or they would just see it as a normal sedan. What they don’t realize is that this car is probably one of the best muscle sedans that’s ever been available in North America.
The G8 is divided into three different trim levels—Base, GT, and GXP. Each of these trim levels has a different powertrain. The base model has a 3.6-liter V6 that produces 256 horsepower and 248 lb-ft of torque, and a 5-speed automatic transmission. The GT has a 6-liter V8 that produces 361 horsepower and 385 lb-ft of torque, and a 6-speed automatic transmission. Finally, the GXP has a 6.2-liter V8 that produces 415 horsepower and 415 lb-ft of torque, and was available with either the same 6-speed automatic transmission as the GT or a 6-speed manual. The manual transmission version of the G8 GXP is by far the rarest and most desirable out of all the G8 variants. It had genuinely competitive performance for its day—MotorTrend recorded a 0-60 mph time of 4.5 seconds and a 1/4 mile time of 13 seconds at 109.6 mph.
It’s An American Version Of An Australian Car
While the Pontiac G8 may have the badge and look of an American muscle sedan, its origins actually lie far from North America. It’s actually a rebadged and Americanized version of the VE Holden Commodore. This was a stalwart of the Australian sedan market back in the mid- to late 2000s, and it had all the same engine options that the G8 offered. As a result, it was similarly fast in its higher-performance variants.
It Wasn’t The First Australian Muscle Car To Be Sent To America
The Pontiac G8’s Australian origins weren’t a one-off in the history of GM’s North American line-up. Several years before it showed up, Pontiac had given the GTO a short-lived revival by putting that badge on an American version of the Holden Monaro. This is what’s now known as the third-generation Pontiac GTO, and it became a favorite of enthusiasts all over North America. While the third-generation GTO only lasted from 2004–2006, how much of a hit it was with enthusiasts must have influenced GM’s decision to bring another Australian model over under the Pontiac branding.
Ute And Station Wagon Versions Were Planned, But Never Happened
The VE Holden Commodore was sold in multiple body styles in its Australian homeland. This included a station wagon and a ute. So, it’s not surprising that there were plans for those versions to become available in the US too. While the station wagon (which would have been known as the Sportswagon) never got off the ground beyond being just an idea, the Ute actually very nearly made it to the American market. A prototype version of the car was shown to the public, and it was even given a proper name (the G8 ST). If it had gone to market, it would have been the first GM-produced ute for the American market since the Chevrolet El Camino was discontinued in 1987!
Why Did The Pontiac G8 Disappear?
By all accounts, the Pontiac G8 seems like it was an amazing car. It gave you muscle car performance with executive sedan practicality. It also didn’t shout about its performance as much as other muscle cars. So, why was it pulled from sale in 2009 after only a couple of short years on the market? The answer has nothing to do with the car and everything to do with the financial state of General Motors at the time.
GM filed for Chapter 11 bankruptcy around the time the Pontiac G8 was in production. As part of the cost-cutting measures GM needed to do, it decided to streamline its model line-up. It chose to do this by completely killing off the Pontiac brand. No more Pontiacs would be built after the 2009 model year. This, unfortunately, included the G8.
The Chevrolet SS Kept Its Spirit Alive After Pontiac’s Death
While the G8 was a casualty of the death of Pontiac, the actual spirit of the car didn’t go away. Several years later, the Chevrolet SS came to the North American market. This was a re-badged version of the VF Holden Commodore (the generation after the VE that the Pontiac G8 was based on), and exclusively came with the 415 horsepower 6.2-liter V8 that’s in the G8 GXP.
What Should You Look For If You Want To Buy A Pontiac G8?
So, you’ve been convinced to take a look at a Pontiac G8. What should you look out for, then, if you’re in the market for one? Well, it turns out that the G8 does have some common bugbears that you’ll need to look out for. G8 GTs are known to have issues with lifter failures on the engine. The G8 GT’s engine has also been known to have problems with weak camshafts and the Displacement On Demand system failing. Some owners mitigate these issues by having a stronger camshaft fitted and having the Displacement On Demand system deleted. All G8 variants are known to be hard on all the front suspension components, so it’s worth having those checked out if you’re looking at one.
As well as that, some parts and body panels for these cars are expensive or near-impossible to find now. Because this is an Australian-market car that’s based on a model that’s been out of production for some time, you get all the same problems with sourcing parts that you’d get with any non-U.S. car that doesn’t have a proper U.S. equivalent. If the worst comes to the worst, you may have to get parts from Australia!
How Much Is A Pontiac G8 Worth Today?
It’s not too long before the Pontiac G8 is a 20-year-old car. So, how much are these cars now worth on the used market? Are they actually a pretty good performance bargain? The answer to the latter question is, in most cases, a resounding yes. The average used value for the G8 across all its variants is $22,252. If you’re happy with going for a base or GT model, you can very easily find them for under $20,000 now. Some base model versions have even sold for under $10,000! If you want a GXP, though, be prepared to pay a fair bit more. Most GXPs are worth over $20,000. If you want one of the super-rare manual GXPs, you could end up paying a small fortune for what this car is. A 2009 GXP with a manual transmission that was in mint condition with only 108 miles on the clock sold for $61,614 in 2025.
That, of course, was an extreme example of how much a Pontiac G8 can be worth. But, it might provide an indicator for how much people are willing to pay for these cars. Especially if it’s one of those rare, manual transmission-equipped GXPs.
Sources: Bring A Trailer, Chevrolet, Classic.com, MotorTrend, Pontiac, Reddit (r/Pontiac)
FAQ
Q: Why was the Pontiac G8 discontinued?
It was discontinued because of the Pontiac brand being axed in 2010.
Q: How much horsepower does the Pontiac G8 GXP have?
The Pontiac G8 GXP has 415 horsepower.
Q: Is the Pontiac G8 the same as the Holden Commodore?
Yes. The Pontiac G8 is a rebadged, left-hand drive version of the VE Holden Commodore.
Q: How much is a Pontiac G8 GXP worth?
The Pontiac G8 GXP is worth anywhere between $25,000-$62,000 in today’s market.
Q: What engine does the Pontiac G8 GT have?
The Pontiac G8 GT has a 6-liter V8 engine.
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