I have an 04 suburban 4x4 5.3l.
I was wondering if anyone out there has installed a K&N cold air and could tell me if it helped mileage at all. I do little to no towing and only put 5k on a year.
Any comments would be appreciated.
The low mileage is killing me at the pump.
Got an '04 2wd with a 5.3. I put an "air raid" intake with a TB spacer. I up'd the exhaust from a 2.5" to a 3" and did a programmer. The best milage I've gotten was 20.5 mpg with about an 85/15% highway/city mix. But don't forget the extra 40 - 50 hp. Worth every penny! Hope this helps you decide.
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