2008 Chevrolet HHR Owner's Manual - Page 111

Parking Brake {CAUTION: If the front passenger seat back is folded down, the armrest may make it awkward to grab and pull up the parking brake lever. If the lever is not pulled up far enough, your vehicle may roll and you or others could be injured. Move your hand lower on the lever or raise the seat back so that you can set the brake. To set the parking brake, hold the brake pedal down and pull up on the parking brake lever. If the ignition is on, the brake system warning light will come on. See Brake System Warning Light on page 3-35. The parking brake lever is located between the front seats. To release the parking brake, hold the brake pedal down. Pull the parking brake lever up until you can press the release button. Hold the release button in as you move the brake lever all the way down. 2-33