All information provided by POCI Technical Advisors, Smoke Signals magazine articles, and is intended only for general knowledge and is not a substitute for professional advice for specific situations or specific conditions of your vehicle. POCI does not give mechanical advice. POCI's advisors, authors and members can answer your general questions about Pontiac, Oakland and GMC vehicles. You should seek professional mechanical advice for any specific mechanical condition(s) of your vehicle. The information contained herein is presented in summary form only and is intended to provide only a broad consumer understanding of each particular set of facts. The information provided should not be considered complete and should not be used in place of consultation with a professional mechanic.