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98 k2500 bad fuel economy no power
ok so I have a 1998 gmc k2500 with a new vortec 5.7 and rebuilt 4l80. Problem I’m having is it has no pulling power, constantly downshifting, and terrible on fuel. I just blew through a full tank of gas on a 176 mile trip. Tires are 265/65/17, fuel pump is new along with filter and all sensors...- turbotrix2004
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- Replies: 13
- Forum: Engine Performance + Maintenance
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