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My 2000 Tahoe (5.3 L, 4 WD) gets about 12 mpg around town. I think this is much lower than other comparable models. Any suggestions on where to look or what your experience has been.
Try cleaning your Mass Air Meter. I went from 10 mpg back to 15 by just cleaning it with some Q-tips. Also it was dirty cause I over oiled my K&N filter.