2/15/2013 7:58 PM
Installed the filter today easy install after lubing saw a 2mpg gain but maybe because of the replaced filter.
8/4/2011 1:02 AM
ON 2009 Sierra 6.6 install was very difficult. After 600 - 800 km oil from filter clogged up air sensor causing engine trouble light to come on and also trigerred a cut back in power which resulted in poor mileage. Dealership informed me to rteplace with stock filter which in returned everything to normal. power and mileage then returned to normal. Turbo sucks to much air and drags the oil through crudding up the sensor and will eventially burn it out if left. Iflightening the oil this will diminish the air filtration defeating its purpose. Any one else find this happening
10/8/2008 8:17 PM
install was easy, and picked up 2.5 MPGs. I checked with My dealer he said I had 1.6 cfm gain over stock Good job K&N
9/26/2008 12:10 AM
No gain in horsepower or mileage.
9/22/2008 6:04 PM
filter slides right in when you remove factory filter o ring as for horse power mileage is ??
2/21/2008 3:03 PM
spent over 30 minutes trying to get filter to slide in level, turn and "lock". lubed everthing up again just to be sure, but still no go. first problem I've ever had w/k&n.