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.
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HOMESERVICE MANUALSCHEVROLET2008HHR LT, 2.4 P, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 168 (CONTINUOUSLY VARIABLE TRANSMISSION (CVT))SYSTEM DESCRIPTIONELECTRONIC CONTROL SYSTEMGRADE LOGIC CONTROL: DESCENDING CONTROL
2008 Chevrolet HHR LT, 2.4 P, Automatic
Grade Logic Control: Descending Control
2008 Chevrolet HHR LT, 2.4 P, AutomaticSECTION Grade Logic Control: Descending Control
WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. However, it is still accessible from the selected car via links, so may be relevant.
When the PCM determines that the vehicle is going down a hill in the D positions, the system selects the most suitable shift schedule based on the steepness of the grade so the vehicle can run smoothly in combination with engine braking.
RENDER: 1.0x
NO RELATED
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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.