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az_eric · 09-23-2020, 04:52 PM

Old thread i know, but any updates? I own a 2007 2500hd classic cclb 4x4 and having hard time breaking 11mpg. Currently have headers, exhaust, volant intake, black bear tune, and e fans. I honestly haven't seen even 1 mpg increase with any of this.

09-23-2020, 04:52 PM	#31 (permalink)
az_eric EcoModding Lurker Join Date: Aug 2015 Location: chandler, AZ Posts: 12 Work pig - '07 Chevy 2500hd classic Wt Thanks: 0 Thanked 2 Times in 2 Posts	Old thread i know, but any updates? I own a 2007 2500hd classic cclb 4x4 and having hard time breaking 11mpg. Currently have headers, exhaust, volant intake, black bear tune, and e fans. I honestly haven't seen even 1 mpg increase with any of this.