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Consumers Review the GMC Sierra 3500

Read recent reviews for the GMC Sierra 3500
Overall Consumer Rating
4.237 Reviews
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2007 GMC 3500 carbon monoxide in cab.
daveo08,11/29/2007
Having driven this truck only a short distance, 2400 miles, problems are already evident. The worst being a diagnosis, from a blood sample test, of carbon monoxide poisoning due to cab infilteration. This is caused by the missfiring of the injection electronics package and the poor cab fit and finish allowing the engine exhaust to get into the cab unless the recirculate mode is used on the heating system. Recirculate is defeated by the controller which will not allow the recirculate mode to be engaged except on max ac. The engine has very poor throttle response and smokes excessively under heavy acceleration. The engine has a propensity to consume oil.
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