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1999 Suburban dropping gas mileage suddenly with new engine
I would really appreciate any suggestions. I replaced the fuel filter and pump in Jan 07. The wires and cap and rotor were replace in Dec 06. The dealer states I might want to try replacing all of those again but states it would be a long shot. Replaced all of the exhaust system in June 05 and replaced right bank cat. converter a month ago.
Please help me. I drive about 30,000 miles a year and the gas will kill me at a 33% drop in mileage.