Summary:
The original muscle car era: The Pontiac GTO became one of the most recognizable muscle cars of the '60s and early '70s, thanks to its aggressive styling and big-cubic-inch engines.
The end of an era: The GTO Judge ended after 1971, and the traditional GTO continued through 1974 as changing emissions requirements and the decline of the muscle car era reshaped the market.
The GTO returns: Pontiac revived the GTO for 2004–2006, combining modern performance, a comfortable interior, and classic muscle car character.
LS power: The 2004 GTO featured a 350-horsepower 5.7-liter LS1 V8, while the 2005–2006 models received a 400-horsepower 6.0-liter LS2.
Room for improvement: Although the GTO delivered strong straight-line performance, its handling and suspension left something to be desired. Aftermarket upgrades can help improve its driving characteristics.
A modern muscle car bargain: Used GTOs can offer an appealing combination of V8 performance, everyday practicality, and aftermarket support at prices well below their original sticker prices.
Muscle Car Pontiac GTOs of the '60s and '70s
When car enthusiasts hear the name Pontiac GTO, they most likely think of the GTOs from back in the '60s and '70s. You know, back when cars had heavy steel bodies and big cubic-inch motors.
It stands to reason why. For many years, the GTO was one of the most popular muscle cars on the market during the '60s and '70s. But, like many other muscle cars of that era, the Pontiac GTO eventually got the ax in favor of more fuel-efficient vehicles.
1971 was the last year for the Pontiac GTO Judge, and 1972 was the last year you could buy a GTO with the traditional classic muscle car look. Although GM had already started detuning its cars to comply with emissions regulations, the GTO still retained much of its classic muscle car styling through 1972.
The 1973 Pontiac GTO introduced a new body style that, in my opinion, just didn't look good. It wasn't particularly popular back then, and it still isn't a favorite among many muscle car enthusiasts today.
Pontiac tried to revive some of the GTO's appeal for 1974, but by then, the muscle car era was winding down, and so was the GTO's traditional identity.
21st Generation GTO

The Pontiac GTO was one of the lucky few muscle cars that got a chance to be reborn in the 21st century. For the years 2004, 2005, and 2006, Pontiac brought back the muscle car legend. With LS1 technology, a roomy interior, and a sporty exterior just like the old GTO, the new GTO was a great tribute to what the Pontiac GTO was and is still all about.
2005 Pontiac GTO
In 2004, the Pontiac GTO came with a 5.7-liter LS1 V8 rated at 350 horsepower and 365 ft.-lb. of torque. You could either order one with a 6-speed manual or a four-speed automatic. These days, being happy with a quarter-mile time of 14.3-14.0 flat doesn't sound too impressive, but 17 years ago, that was pretty good for a sedan.
2005-2006 Pontiac GTO
For 2005 and 2006, the Pontiac GTO would keep the transmission options the same but get an engine upgrade. GM decided on putting a 6.0-liter LS2 motor in the new-generation GOAT that produced 400 horsepower and 400 ft.-lb. of torque. This new setup managed to cut off about half of a second in quarter-mile time and even more if you had some aftermarket performance parts bolted on. Some mostly stock GTOs seen times slips that dropped into the low-13 second range.
Lack Luster GTO Suspension
Unfortunately, the 2004 Pontiac GTO suspension performance was found to be a little less than impressive. They had sluggish reflexes, excessive body roll, and weak brakes. When the sports sedan received the LS2 for the 2005-2006 models, the brakes got upgraded, but the GTO still suffered from a weak suspension. The good news is there are plenty of aftermarket bolt-on suspension parts that can easily be installed in your driveway over a weekend to help fix many of the suspension problems.
The GTO: A Wolf in Sheep's Clothing
With the various amount of cool colors to shop for, an optional ram air hood that could have been ordered, 15 or 16-inch rims, and a standard retro-looking Pontiac split front grill, the GTO is a good-looking sedan that some might not even recognize as a modern muscle car.
There is one downfall that turned many consumers off, and that was the price tag. Unfortunately, you could buy a Trans Am, Camaro Z28, or Mustang for the price of a brand new Pontiac GTO.
One of the nice things about the Pontiac GTO is that if you are looking to buy one now, you should be able to find one for a good price. I've priced them anywhere from around $9,500-$20,000 - depending on mileage and shape - a far cry from the 30k price tag they originally came with.
On the low end of the price range, most of the Pontiac GTOs had high mileage, but I would not let that deter anyone. Cars these days, if taken care of properly can last for a long time.
In the end, the 2004-2006 Pontiac GTO is a great buy for car enthusiasts that really like the technology of the LS1/LS2 motor. With all of the performance capabilities and aftermarket parts for LS engine setups, the GTO is a perfect car for someone who is looking for something that can be fast, but at the same time, reasonable and practical.