johnnunez29
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- Joined
- Jun 11, 2012
- Posts
- 44
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i have a 02 yukon denali and this thing swallows gas! it might have something to do with a bad fuel pump and bad 02 sensor. but after i fix these things i want to try to get as good mpg as possible. ive read that bb is the preffered tune. what im trying to ask is does bb tune improve mpg? acceleration? what does it do? how much is it? p.m me please thanks