2004 GMC Sierra 1500 5.3

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2004 GMC Sierra 1500 5.3

Post by sellingchico »


I have a 2004 GMC Sierra 1500 with the 5.3. It's a z71 4x4, and I'm wondering if anybody has played with the tune to get better gas mileage? I'm getting about 12.5 on average and on road trips or when working during the week id like to tune it down for MPG. I have the FSL version, are there any settings I can play with to bring the fuel economy up?

Thanks in advance,

Austin Barron
2004 GMC Sierra 1500 z71
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Re: 2004 GMC Sierra 1500 5.3

Post by mikel »

look for info on dialing in your fuel trims to help with optimal MPG.
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