I have an 03 Silverado 2500hd with a cold air intake, headers, exhaust, spacer and a tune. I was thinking about getting some efans to get a little better gas mileage out of it. I'm just want to know if any of you guys have had any luck with any other upgrades and have seen better mpg.

 

What is it getting now? Also what cab configuration? Who did the tune? Ditch the TB spacer as the gains it gives you doesn't out weight what it actually weights, if that tells you anything.

 

It's a crew cab and a shop in town did an HPTuners tune.

 

?????

 

I'm not too sure but I'm thinking its somewhere around 15-16mpg

 

15-16

Guessing you have a 6.0, 4l80e, and 3.73 or 4.10 gears in a CC. If so that is on par for mileage and you will be hard pressed to get better.

 

yep right on, so you think the efans won't help much?

 

I didn't see ANY mpg or power gains from efans. The only thing I got was an AC that cooled down faster. Don't get them expecting to see any mpg gains, and even if you got 1mpg improvement, it would take years to cover the cost you spent on the fans.

 

Agreed.

 

Welcome to PERFORMANCETRUCKS.net.

What is this "gas mileage" that you speak of? I'm not finding it anywhere in my Performance Dictionary.