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How to Install Airaid MXP Series Cold Air Intake w/ SynthaFlow Oiled Filter on your Sierra



1. Disconnect the negative battery cable. Remove the factory engine cover by lifting up on the front, and then pulling the cover towards the front of the vehicle. It is only held in place with grommets.


2. Disconnect the factory breather hose at the valve cover.


3. Separate the factory intake tube from the plastic clamp that secures the radiator hose to the tube. A firm downward push will usually do it.


4. Loosen three hose clamps. One at each end of the factory intake tube, and one on the Mass Air Flow sensor (MAF) where it clamps to the factory airbox.


5. Slide the factory intake tube off of the MAF sensor, rotate it up so that it disengages from the mounting grommet on the intake manifold, and then slide it forward off of the throttle body and remove it from the vehicle.


6. Remove, and set aside the MAF sensor from the factory airbox using caution to retain the factory clamp and seal.


7. Rock the factory airbox back and forth to loosen it from the mounting grommets, and remove it from the vehicle.


8.Using a 10mm socket, remove four bolts, and then remove the factory airbox mounting plate from the vehicle and set aside. Three of these bolts will be reused in step 11.


9. Install the Filter Adapter (#4) onto the Cold Air Box, or CAB (#3), as shown using the three 1/4 -20 Button Head Bolts (#9) and 1/4” Washers (#10).


10. Relocate, and secure the wire harness to the inner fender edge as shown using the Edge Clip Cable Tie (#13).


11. Install the Airaid CAB into the vehicle replacing the factory airbox. Secure the CAB using the three of the factory 6mm bolts from step 8. Do not over tighten. Apply the Airaid decal inside the Airbox as shown.


12. Reinstall the MAF sensor onto the Flter Adapter, and tighten the clamp.


13. Install the Urethane Hump Hose (#5), and two #64 Hose Camps (#11) onto the MAF sensor as shown. Tighten only the clamp on the MAF sensor at this time.


14. . Install the 1/4” NPT x 3/8” Barb Fitting (#12) into the Airaid Intake Tube as shown. Next install the Urethane Coupler (#6) onto the throttle body end of the tube using two #64 hose clamps (#11). Only tighten the Tube side clamp at this time.


15. Install the Airaid Intake Tube into the Hump Hose first, and then onto the throttle body. Adjust for fit, and tighten the hose clamps. Next install the 3/8” x 14” breather hose (#7) between the 1/4” NPT x 3/8” barbed fitting in the tube, and the factory port on the valve cover.


16. Install the Airaid Premium Filter (#1) onto the Air Filter Adapter, and tighten the hose clamp. Next install the provided Weather Strip (#8) onto the top of the CAB. For ease of install, start at the inner fender, and work your way towards the radiator. Reinstall the engine cover.

17. Double check your work!
Make sure there is no foreign material in the intake path. Make sure all clamps, hoses, bolts, and screws are tight.

18. Reconnect the negative battery cable!


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