How to Install K&N Series 77 High Flow Performance Cold Air Intake on your Silverado

2. Disconnect the mass air sensor electrical connection and unhook the wiring harness from the air filter housing.

3. Disconnect the crank case vent from the intake plenum and valve cover port and remove it from the engine.

4. Loosen the hose clamp securing the intake tube to the air filter housing.

5. Loosen the hose clamp securing the intake plenum to the throttle body and then remove the intake plenum from the vehicle.

6. Lift up and remove the air filter housing from the vehicle.

7. Remove the four bolts that secure the air filter housing mounting plate and then remove the plate from the vehicle.  

NOTE: Three of the bolts will be reused in a later step. 

8. Install the provided edge trim onto the heat shield as shown.  

NOTE: Some trimming of the edge trim will be necessary. 

9. Install the heat shield and secure it to the air filter housing mounting plate location using three of the factory bolts from step #6. 

10. Install the filter adapter into the K&N® air filter and secure with the provided hose clamp.  

NOTE: Drycharger® air filter wrap; part #  RF-1041DK is available to purchase separately. To learn more about Drycharger® filter wraps or look up color availability please visit  http://www.knfilters.com®. 

11. Install the filter assembly into the heat shield filter top first, then rotate the filter and pass the adapter through the hole in the heat shield. Secure the filter adapter to the heat shield using the provided hardware. 

12. Install the provided step hose (084055) onto the throttle body and secure with the provided hose clamp. 

13. Install the provided hump hose (08699) onto the filter adapter and secure with the provided hose clamp. 

14. Remove the two screws securing the mass air sensor into the air filter housing and then remove the mass air sensor from the air filter housing. 

15. Install the mass air sensor assembly into the K&N® intake tube and secure with the provided hardware. 

16. Install the vent fitting into the K&N® intake tube.  NOTE: Plastic NPT fittings are easy to cross thread. Install the vent fitting “hand” tight, then turn it two complete turns with a wrench. 

17. Install the K&N® intake tube into the hose at the filter adapter and then into the hose at the throttle body. Adjust the tube for best fit and then secure with the provided hose clamps. 

18. Install the provided crank case vent hose onto the valve cover port and onto the vent installed into the intake tube. Secure the hose with the provided hose clamps. 

19. Reconnect the mass air sensor electrical connection.

20. Reconnect the vehicle’s negative battery cable. Double check to make sure everything is tight and properly positioned before starting the vehicle. 

21. NOTE: Most General Motors vehicles have the Vehicle Emissions Certification Information (VECI) label affixed to the air filter box. In order to be compliant with California emissions laws, the label MUST remain in the engine compartment. If the Vehicle Emission Control Information label is removed during modification, a new replacement label must be obtained and installed in a readily visible position in the engine compartment. The label shall not be affixed to any equipment which is easily detached from the vehicle. We recommend that the label is affixed to the underside of the hood adjacent to the hood latch. The label is Vehicle Identification Number dependent and can be ordered from the vehicle dealership. In order to receive the proper decal please bring your VIN with you. Failure to have the VECI under the hood may result in failure of a pre-registration smog test. 

22. It will be necessary for all K&N® high flow intake systems to be checked periodically for realignment, clearance and tightening of all connections. Failure to follow the above instructions or proper maintenance may void warranty.