The most serious problems was the Aztek won't move forward or in reverse at only 40,000 miles. It was towed to a GM dealer who said there are gears just laying in the transmission pan. This car has had the oil changed every 3 to 4 thousand miles.
The tires had to be replaced twice so far.
The lumbar support knob has never stayed on even though the GM dealer has replaced it 4 times while it was under warranty.
The rear hatch has never opened with only one click of the inside switch or the remote keyless button this also was taken to the Gm dealer 4 times while under warranty.
I really like the look of the Aztek and love the color yellow its easy to find in any parking lot. I also like all the gadgets like the heads up display, the dual climate controls, the radio controls on the steering wheel, and the air compressor in the back. But I'll never buy another Pontiac or any GM car. I expect the transmission to last more than 40,000 miles and I will get a better warranty with the next car I buy.
The exact same thing has happened to me. I'm at 101,000 kms. GM dealer told me 4500.00 for a new trans, plus it's AWD, so another 3000.00-4000.00 to clean up the rear final drive. Gear teeth are all over the place. Terrible. I'll never get another one.