2004 Chevy HD Truck Duramax Diesel High Output “LLY” Installation Instructions
Tools Required For Installation:
Flat Head Screwdriver
8mm, 10mm Socket
Ratchet & Extension
3/32”, 5/32” Allen Wrench
#T20 Security bit (Included)
1. Disconnect the negative battery cable. Disconnect the Mass Air Flow (MAF) sensor wiring harness. Using the supplied T-20 Security bit, remove the two screws and the Mass Air Flow sensor from the tube (save the sensor for reuse). Loosen the hose clamps on each end of the factory intake tube assembly.
2. Remove the factory filter minder and grommet.
3. Remove the factory intake tube assembly from the engine. Rock the factory air box back and forth and remove it from the vehicle. There are only grommets holding it in, no bolts.
4. Using a 10mm socket, remove the five bolts and mounting plate from the engine compartment.
5. Assemble the Airaid Cool Air Dam panels (#2, #3) using five 6-32x 5/16” screws (#9), #6 flat washers (#10) and 6/32 keps nuts (#11).
6. Using three ž-20x 1/2” button head bolts (#12) and 1/4” flat washers (#13), install the filter adapter (#4) on the Airaid Cool Air Dam.
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