Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Spark Plug Usage
Ensure that the correct spark plug is installed. An incorrect spark plug causes driveability conditions. Refer to Ignition System Specifications for the correct spark plug. See IGNITION SYSTEMS in SERVICE & SPECIFICATIONS - 2.2L ALERO, CAVALIER, GRAND AM & SUNFIRE article. Ensure that the spark plug has the correct heat range. An incorrect heat range causes spark plug fouling (colder plug), pre-ignition, causing spark plug and/or engine damage (hotter plug).
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.