Engine Oil Additives/Engine Oil Flushes

GMC Sierra / GMC Sierra Owners Manuals / Vehicle Care / Vehicle Checks / Engine Oil / Engine Oil Additives/Engine Oil Flushes

Do not add anything to the oil. The recommended oils with the dexos specification and displaying the dexos certification mark are all that is needed for good performance and engine protection.

Engine oil system flushes are not recommended and could cause engine damage not covered by the vehicle warranty.

    See also:

    Engine Oil Messages
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    Floor mats with a button-type retainer. Removing and Replacing the Floor Mat 1. Pull up on the rear of the mat to unlock and remove. 2. Reinstall the floor mat by lining up the floor mat openings ...

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