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Old 07-03-2020, 10:22 AM   #18
LT7A
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Join Date: Oct 2015
Location: PNW
Posts: 3,511
Re: 1999 GMC Suburban K2500 DD

Quote:
Originally Posted by OutlawDrifter View Post
Thanks!

Last tank back and forth to work was 11.2mpg. This is with the Blackbear tuned ECU. Definitely drives much better
Well that sounds all right. You can probably add a couple more MPG to that if you are on the highway for an extended period of time. What kinds of differences did you notice with the blackbear tune?
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