2007.5-2010 GMC Duramax LMM Air Filters

Air filtration on a Sierra HD with the LMM

GMC fitted the 2500HD and 3500HD with a high-capacity air cleaner as standard equipment, and on the LMM everything the engine breathes passes that element before it reaches the turbo mouthpiece and the variable-vane compressor. That makes the filter a maintenance part with a real job rather than a styling choice. Two kinds of parts end up here: elements that drop into the factory housing, and filters built for a specific aftermarket intake kit. A wrap or pre-filter is a third category, sized to the element it covers rather than to the truck.

What fails and why

Filters load up instead of failing outright, and the rate depends on the work the Sierra does. Dirt roads, pasture and construction dust fill an element much faster than interstate towing, so go by what the filter looks like, not by a mileage figure. Service style is the other thing to settle. An oiled element gets cleaned and re-oiled; a dry element skips that step entirely. And if you find an oil film in the charge pipes downstream, that is the closed-crankcase system doing what it was designed to do rather than evidence of a filter problem on this engine.

Stock replacement vs. upgrade

The simple route keeps the factory box and changes the element. The S&B KF-1035 replacement filter is cataloged across the 2001-2010 Duramax, and Mahle's LX5211 and a PPE element filter for the 2006-2010 trucks serve the same purpose. The upgrade route is a complete intake kit, where S&B's LMM-specific 75-5091 comes as an oiled filter with a 75-5091D dry version, and WCFab builds 4 inch LMM kits with their own air box. Wraps are the simple add-on: Banks lists a pre-filter wrap for its 42138 element and S&B a wrap for 2001-2010 trucks, and WCFab offers a dry 4 inch inlet filter if you are already running their tube.

What we carry

Elements and wraps come from S&B, with the KF-1035 replacement filter and the WF-1023 filter wrap, and from Banks Power, with the 42138 element and its matching pre-filter wrap. Mahle supplies the LX5211 air filter for 2006-2010 engines, PPE an element filter for the same span, and Wehrli Custom Fabrication a dry 4 inch inlet filter listed across a wide Duramax range. Complete intake kits, boots and charge piping live on the intake page, and the rest of the catalog is under Duramax.

Fitment notes

Do not be thrown by the year ranges. Element part numbers often span multiple Duramax generations because the stock housing and the inlet size carry over, which is why one filter can be listed 2001-2010 and another even wider. Intake kits are the opposite and are sold by engine and body, so an LBZ kit and an LMM kit are not interchangeable and a 2007 Sierra HD may be either the Classic GMT800 truck with the LBZ or the GMT900 truck with the LMM. Wraps and pre-filters are matched to an element part number. Trim, whether Work Truck, SLE or SLT, makes no difference here. Verify by VIN or use the fitment checker.

Frequently asked questions

Why are these filters listed for years outside 2007.5-2010?

Because the factory air cleaner and inlet sizes carry across more than one Duramax generation, so a single element can cover a long span, as the S&B replacement filter does for 2001-2010 trucks. Full intake kits are different: those are cataloged by engine and body, LBZ or LMM and classic or new, and should be ordered that way.

Do I need a cleaning and oil kit?

Only if you run an oiled element. S&B sells its LMM intake as the oiled 75-5091 and the dry 75-5091D, and the dry version needs no oil. Cleaning and oil kits are listed with the intake accessories if you are running the oiled filter.

Replacement element or whole intake kit?

If the goal is clean air at service time, a replacement element in the standard high-capacity air cleaner is the straightforward answer. A full kit replaces the box and the tube and is the move when you want the LMM-specific intake from S&B or WCFab. Both are on the shelf, so decide on service style and budget rather than on year.

Not sure what fits? Call the shop at the number in the header, or use the fitment checker on any product page. We install everything we sell.