OnStar Services

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Weatherstrips
Apply silicone grease on weatherstrips to make them last longer, seal better, and not stick or squeak. See Recommended Fluids and Lubricants  . ...

Front Wiper Blade Replacement
1. Pull the windshield wiper arm connector away from the windshield. 2. Squeeze the grooved areas on each side of the blade, and turn the blade assembly away from the arm connector. 3. Install ...

Manual Transmission
If the vehicle has a manual transmission, the shift lever is located on the center console between the front seats. The following explains how to operate the manual transmission. CTS CT ...