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gchemist · 06-22-2008, 08:53 PM

Update: The Jimmy has a solid 22+ MPG with PCM programming. It was close to 21-21.5 prior to reprogramming. It pulled 335.4 miles on 15 gallons. The gain is close to OD expected gains from the 4L60E.

I don't know how much the ram air will affect results. I'll post more results after running the ram air setup.

06-22-2008, 08:53 PM	#11
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Re: Update your PCM!! Update: The Jimmy has a solid 22+ MPG with PCM programming. It was close to 21-21.5 prior to reprogramming. It pulled 335.4 miles on 15 gallons. The gain is close to OD expected gains from the 4L60E. I don't know how much the ram air will affect results. I'll post more results after running the ram air setup.