The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post

Swampdonkeys · 03-26-2006, 06:22 PM

Ok guys I have a 03 GMC 3\4 ton H/D extend cab 4 x 4 with a 6.0 litter gas pot. The problem is, I am making 12 miles to the gallon in the city on the highway and making 14 mpg with today's gas prices. This is killing my pocketbook, what kind of fuel mileage are you guys making, have you done any modifications what can you guys recommend. I have seen different ads on TV about to chips that adjusts your power and fuel mileage. Has anybody you these? Do they work?

I used to have an 81 F250 with a 351W and it made 15 miles per gallon around the city. I thought when I went to a new truck. It would make a little better fuel mileage. Any thoughts. Any suggestions?

03-26-2006, 06:22 PM	#1
Swampdonkeys Registered User Join Date: Aug 2005 Location: Calgary, Alberta, Canada Posts: 6	Fuel Economy Ok guys I have a 03 GMC 3\4 ton H/D extend cab 4 x 4 with a 6.0 litter gas pot. The problem is, I am making 12 miles to the gallon in the city on the highway and making 14 mpg with today's gas prices. This is killing my pocketbook, what kind of fuel mileage are you guys making, have you done any modifications what can you guys recommend. I have seen different ads on TV about to chips that adjusts your power and fuel mileage. Has anybody you these? Do they work? I used to have an 81 F250 with a 351W and it made 15 miles per gallon around the city. I thought when I went to a new truck. It would make a little better fuel mileage. Any thoughts. Any suggestions?