gas mileage still not great - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat
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2000-2005 Discuss your 2000-2005 Bonneville SE, SLE, and SSEi Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 11-25-2005, 04:43 PM   #11
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ok i did it all, new gm o2'*, new fuel filter, new plugs and the wires are perfect, needed new tires so i did that too, still 19 on the highway and i still think its the trans, going up a incline it bogs quite a bit in 4th gear before itt release and kicks down into 3rd, seem like when you drive normal its going through the gears a little too quick
any ideas
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