2005 Grand Prix SE Issues - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat

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Old 08-29-2011, 11:00 AM   #11
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Hey Guys,

Haven't had much time to look around the car, am getting busy going back to school. She has recently been complaining about getting worse gas mileage as well...from what she tells me, about 300 miles to a tank instead of 400 doing the same driving she has done before.

So first off, im going to give the car a little tune up. I'm sure most of the stuff is OEM on the car. Its approaching 80K and could use a good tune up.

So my list of things to do is:

- New Plugs and Wires
- O2 Sensor
- Was going to replace the fuel filter..but appears this car has an in-tank one?? Can anyone verify this?

Any other relatively cheap things I should to to help tune it up and help recover her gas mileage?

Thanks guys!

(Didn't want to open another thread, so extending this one!)
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