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wyattglock · 09-13-2012, 01:57 PM

I had a 2003 GMC Sierra 1/2 ton extended cab with the 4.3 and 4l60E. Granted it was a better injection system, but even with a 5000lb truck I got 22mpg with 3.42 gears. If you are running the 700r4 and have a well tuned engine, I don't see why you couldn't see similar numbers in your truck. It will be a dog off the line, but then if you are looking for reliable, daily driver traits, it will be hard to beat.

09-13-2012, 01:57 PM	#3
wyattglock Registered User Join Date: Jul 2010 Location: Lafayette, IN Posts: 622	Re: 4.3l vs. 5.7l in a commuter truck I had a 2003 GMC Sierra 1/2 ton extended cab with the 4.3 and 4l60E. Granted it was a better injection system, but even with a 5000lb truck I got 22mpg with 3.42 gears. If you are running the 700r4 and have a well tuned engine, I don't see why you couldn't see similar numbers in your truck. It will be a dog off the line, but then if you are looking for reliable, daily driver traits, it will be hard to beat.