2000 Gmc Sierra Computer Code Po251a Rotor Cam Starts Hard Runs Poor

2000 GMC SIERRA
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computer code po251a....rotor cam problem starts hard runs poor bucks when you lug it any ideas what it could be?
Oct 20, 2012 at 12:28 AM
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ASEMASTER6371
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what motor and 2 or 4 wheel??

Roy
Oct 20, 2012 at 12:43 AM
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