Banks Power 15 Chevy 6.6L LML Ram-Air Intake System - Dry Filter
The Banks 42248-D is a Ram-Air cold air intake with a dry, washable filter for 2015 Chevrolet Silverado and GMC Sierra 2500HD and 3500HD pickups with the 6.6L LML Duramax. Buyers are usually trying to bring EGTs down when towing, cut soot on a truck that works hard, or replace a stock airbox that is loading its paper filter too quickly.
The stock LML system sits on a tray beside the passenger fender, with the mass air flow (MAF) sensor and intake sensor screwed into the airbox cover and a tube running to the turbo compressor inlet. The Banks kit replaces the box and tray with a sealed housing on two new brackets, a cover that carries your stock MAF and intake sensors, a dome-shaped filter, a 5 inch bellows and a new intake tube and compressor inlet hose. Banks says it flows up to 35 percent better than stock and delivers denser air to the turbo inlet, which is what lowers EGTs and soot. The bellows lets the engine move on its mounts without stressing the tube, and Banks says the system is designed not to set fault codes.
The black dry element (Banks 42138-D) is never oiled, which matters on a MAF-equipped engine: there is no oil film to drift onto the sensor element.
An intake will not cure a shudder or flare from the transmission. If the truck shudders at light throttle around 40 to 50 mph, or slips under load, start with our Allison 1000 TCC shudder diagnosis instead.
Scan for codes first, especially any MAF or intake air temperature codes, and fix those before changing the intake. Check the inside of the stock tube for dust past the filter, and check the compressor inlet for oil. Then look at how your stock airbox is mounted, which is the key fitment check below.
Listed for 2015 Chevy and GMC pickups with the 6.6L LML Duramax. Banks makes two Ram-Air kits for 2015-2016 LML trucks, and they are not interchangeable. This 42248-D kit (manual 96460) is for trucks whose stock airbox lifts out of rubber grommets on a bolted airbox tray. The 42250 kit (manual 96853) is Banks' version for the newer airbox style, where the box clips onto peg retainers next to a fender bracing bar. Compare your truck to both manuals, or send us the year and VIN and we will confirm. CARB Executive Order D-161-102 lists 42248-D for 2015 GM pickups with the LML, but the posted copy is stamped rescinded, so California owners should confirm current status. For a red oiled element, see the 42248 oiled filter version. Allison transmission parts are in our Allison 1000 collection.
A fresh Allison 1000 filter and gasket kit or a deep Allison pan pairs well with this on a tow truck. Our Allison 1000 fluid and filter specs list the fluid and service intervals.
| Brand | Banks Power |
| Part number | 42248-D |
| Fits | Banks Power 15 Chevy 6.6L LML Ram-Air Intake System - Dry Filter |
| Type | Short Ram Air Intakes |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
Banks made two kits for 2015-2016 LML trucks. The 42248 and 42248-D are for trucks whose stock airbox sits in rubber grommets on a bolted tray. The 42250 is for the newer airbox style that clips onto peg retainers near a fender bracing bar. Send us the year and VIN if you are not sure.
No. Banks lists separate Ram-Air kits for 2011-2012 and 2013-2014 LML trucks. This one is for the 2015 trucks.
Banks says the Ram-Air is designed not to cause fault codes. The stock MAF and intake sensors move to the Banks cover with new gaskets. Do not overtighten the sensor screws; Banks calls for 3 in-lb.
No. This is the dry element. Clean it with a dry filter cleaner and water every 50,000-100,000 street miles, or sooner in dust, and never oil it.
Not directly. It lowers EGTs and helps the engine breathe. The Allison 1000 still needs clean fluid and filters, especially if you tow or add a tune.
