Not sure which 2009 GMC Sierra Air Filters - Custom Fit is right for you? We have over 14143 customer reviews, with an average rating of 4.5, to help you find exactly what you're looking for. Here's what some of our customers have said:
"I purchased the K&N filter for my new 2009 GMC truck a couple of weeks ago and noticed an immediate improvement in performance and gas mileage as promised.
I would reccomend K&N to anyone who is looking for an easy way to improve their mileage and performance." —David B from Florence, MS bought a K&N Air Filters for a 2009 GMC Sierra, 1500, 5.3L V8.
"The AFE Pro-Dry S is better than that "famous" oiled lifetime filter because it's filtration is equal, it's also cleanable many times, but by being a dry filter, it won't mess up your MAF screen with oil condensation from an over-oiled filter. And you can feel the difference between AFE and stock." —George F C from Meridian, MS bought an aFe Pro-Dry S Air Filters for a 2009 GMC Sierra, 5.3L V8.
"After I installed the filter I noticed the engine felt and sounded like it had more power. Once I got it on the rode I could tell an increase in power. After I few tanks of gas I did see the MPG increase also. Will be buying for my other cars also." —Thomas C from Elkins, AR bought a K&N Air Filters for a 2009 GMC Sierra, 4.6L V8.
"Christmas present so no miles have been put on vehicle with filter. Excellent build quality and design." —Stephen W from Washington, NC bought a Green Air Filters for a 2009 GMC Sierra.
"I have know used three K&N air filters in my different cars I owned. This is the only filter that I will ever buy and it's the first thing I replace within a few days of buying a car. I can notice the difference from a standard air filter to a K&N high-flow filter at take offs and passing cars on the highway, also notice the difference at the pumps with up to 5 mpg on one of my cars. These filters are great creation and everyone I talk how great they are and tell them it's must. The filter pays for its self after a few tanks of gas." —Thomas G from Marquette, MI bought a K&N Air Filters for a 2009 GMC Sierra.
"YOU CANT BEAT AN AIR FILTER THAT DOES ITS JOB-KEEPING CONTAMINANTS FROM ENTERING INTO YOUR ENGINE'S BREATHING SYSTEM. YOU WILL DEFINITELY SEE BETTER ACCELERATION AND SOME FUEL MILEAGE IMPROVEMENT AS WELL. THESE FILTERS LAST A LONG TIME WITH PROPER CARE USING THE K&N CLEANING KIT AND DOING EXACTLY AS INSTRUCTED." —Jess A from Fort Collins, CO bought a K&N Air Filters for a 2009 GMC Sierra, 5.7L V8.
"This filter appears to be of high quality and will last a long time. With vendors that you use,I'll be buying more and more from you. THANK YOU" —Larry B from Mecosta, MI bought a K&N Air Filters for a 2009 GMC Sierra, 1500, 4.8L V8.
"Simple swap out haven't seen the power increase as they discribe but hoping for results" —Greg K from Baytown, TX bought a K&N Air Filters for a 2009 GMC Sierra, 1500, 5.3L V8.
"Installation was easy, the new filter fit in my factory air box perfectly. Gas mileage seems to have increased a little and the engine seems to run a little smoother." —Michael T from Channahon, IL bought a K&N Air Filters for a 2009 GMC Sierra.
"So, for this has been a great performance product,great price and it was easy to install." —Kirk H from Austin, TX bought a K&N Air Filters for a 2009 GMC Sierra, 1500, 5.3L V8.