New noise 2015 GMC Terrain 5.3

By Maggie
December 27, 2017 in Troubleshooting & Recalls

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Maggie

Posted December 27, 2017

Recent noise under load at about 65 mph. Transition between 4 and 8 cylinders in use has become more palpable. Also gas mileage has gone from averaging 19 to about 16...

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