The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Q- speedo off & bad MPG

Twin Turbo Skylark · 02-16-2017, 03:38 PM

I agree, use a programmer to adjust the tire size till the spedo reads correctly.. regarding the poor fuel mileage how bad is it? I went with a Blackbear tune and I have WAY better power and also better fuel mileage now.

02-16-2017, 03:38 PM	#10
Twin Turbo Skylark Registered User Join Date: Nov 2015 Location: fort saskatchewan Posts: 73	Re: Q- speedo off & bad MPG I agree, use a programmer to adjust the tire size till the spedo reads correctly.. regarding the poor fuel mileage how bad is it? I went with a Blackbear tune and I have WAY better power and also better fuel mileage now.