Air Dam

[mbrannon]

This morning I had a wild idea and put the air dam back on the truck. My mpg had reall dropped since the tire upgrade... wondering if this will ha have any impact.

[VMax2007]

I did the same thing a few months ago.

[Matt_]

I threw mine out

 

But my commute to work is pretty short, 12 miles, and all back roads. Fastest i hit is 50ish for about 2 miles... do it wouldn't help my mpg at all. I'd consider putting it back on if i was doing 65-70mph highway commuting, but it looks so much better off

[03blackz71]

I just did the same thing today a couple hours ago.

[Silverado4x4]

I had mine off for about 2 weeks and then put back on because my hood would flutter going about 60 mph down the highway but that was with the leveling kit on so I put the air dam back on and still had the flutter,removed the leveling kit kept the air dam on and said the hell with it.

[gmowner4life]

I was thinking about taking mine off today, but seeing how I get up to 70 mph every day, I guess I'll leave it on.

[AgDoctor]

i ran mine both ways, twice. i dont think that the difference is any more than a half a mile per gallon. i know that it must be measureable if GM took the time to engineer and install it but i think it had more to do with drag coefficient than mpg. i tore mine off once backing out of a bog, that thing should be recycled to make some bed caps that should be standard on a fullsize truck with the other options that are standard.

[Matt_]

i ran mine both ways, twice. i dont think that the difference is any more than a half a mile per gallon. i know that it must be measureable if GM took the time to engineer and install it but i think it had more to do with drag coefficient than mpg. i tore mine off once backing out of a bog, that thing should be recycled to make some bed caps that should be standard on a fullsize truck with the other options that are standard.

 

 

When doing the EPA testing for mileage, it makes a notable difference. For everyday driving... it can either make a big difference, or none at all; there's a ton of other factors that come into play at that point (in most cases, its minimal)

[03blackz71]

MPG were the same with and without the air dam for me. But I just put some 20's on with some street thread 33" tires and I think it looks better with the air dam on but with my BFG's in my sig I like it off. It is just for looks for me.

[scottmoyer]

In response to the hood flutter, adjust the bump stops up. My truck did this when it was new and drove me crazy for about a day. I adjusted the stops and haven't had flutter in over 3.5 years.

[Silverado4x4]

In response to the hood flutter, adjust the bump stops up. My truck did this when it was new and drove me crazy for about a day. I adjusted the stops and haven't had flutter in over 3.5 years.

 

Hood flutter was in the middle of the hood, I tryed the bumpstop method.

[Nick The Great]

My truck didn't have one when I got it

 

I think the previous owner got too close to a parking barricade or something.

[snarkee]

i had mine off and didnt like the look......its the 33's that kill my mileage

[J-man67]

Mine has been off since mile #5. I doubt it would help me any. Some trucks do look better with it on though.

[Mabe]

I had mine off for most of the winter after I ripped it off on a snow bank. I did see my avg mpg jump up about 1mpg. That is with roughly 80% highway driving.