When reaching 60 mph on the highway speed starts decelera...


When reaching 60 mph on the highway speed starts deceleration. 2006 grand prix supercharge. Mechanic's Assistant: Will the [headlights](/topics-headlight-pontiac/) turn on? Is the battery fully charged? Yes Mechanic's...

When reaching 60 mph on the highway speed starts deceleration. 2006 grand prix supercharge. Mechanic's Assistant: Will the [headlights](/topics-headlight-pontiac/) turn on? Is the battery fully charged? Yes Mechanic's Assistant: Are you fixing your Grand Prix yourself? What have you tried so far? New battery

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