A Loose or worn gas cap may cause Check Engine Light to illuminate.
Resources for the Repair and Maintenance of your 2009 Chevrolet HHR SS
2009 Chevrolet HHR SS
2009 Chevrolet HHR SS Problems
Brake fluid can become dirty and may cause problems in the brake system; it should be flushed every 60,000 miles.
GM recommends replacing the engine coolant at 100,000 miles; however, our technicians tell us that the coolant may become contaminated and require a complete cooling system flush every 60,000 to 70,000 miles.
All engines Our technicians tell us that the recommended spark plug life is 100k miles. The ignition coils are mounted directly on top of the spark plugs, as a result there are not longer any spark plug wires to fail.