GM Letter - Engine Intake Valve Seats May Wear

11-24-2008, 06:22 PM

This past week, I received a letter from GM stating that some 06 Colorados with the 4 (2.8) or 5 (3.5) engine may experience a condition where the intake valve seats may wear, apparently causing partial misfire and service engine soon light to activate. Continued operation will lead to engine idle roughness.

GM states they warranty this defect up to 100K or 7 Years.

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