How to Install SLP Performance Pack - Level 2 on your Silverado

The following section will guide you through the disassembly of the stock components. Special care should be taken to label fasteners and parts that are taken off during this procedure since many will be reused.

1. Cover both fenders with fender covers to protect the vehicle fi nish.
2. Disconnect the battery ground cable.
3. Disconnect the MAF sensor connector.

4. Using the T-15 Torx bits, remove the two (2) screws retaining the MAF sensor. Retain screws for installation.

5. Remove the MAF sensor and retain for installation.

6. Loosen the clamps retaining the clean air tube to the air box and throttle body.

7. Disconnect the quick connect fi tting on the driver side of the clean air tube.

8. Disconnect the quick connect fi tting on the passenger side of the clean air tube.

9. Remove the clean air tube from the vehicle.

10. Remove the two (2) bolts holding the fender brace in place.

11. Remove the air box assembly from the vehicle, by pulling up. It is held in place by three (3) barb fi ttings.

12. Disconnect and remove the PCV from the driver side valve cover. Retain for installation.

13. Disconnect and remove the PCV line from the passenger side valve cover.

14. Using a razor, score the PCV lines just removed then pull out the quick connect fi ttings. Retain the fi ttings for installation.

15. Remove the two (2) bolts holding the retaining support bracket between the radiator support and the fender.

SECTION B – INSTALLATION

1. Install two (2) rubber grommets (P/N: 1150- 58GRMT) and fi ttings (P/N: 1311-9N285) into the clean air tube (P/N: 2414-9B659). Tip: Use glass cleaner or spray lubricant on the parts to help installation.

2. Install the fi lter tube-to-clean air tube coupler (PN: 2414-9B661) on the straight part of the tube and the throttle body-to-clean air tube coupler on the bent side. You will use either P/N: 241462- 9B662 or P/N: 241453-9B662 depending on the engine size. Tighten the inside hose clamps to 3 Nm and leave the outside loose.

3. Insert one (1) straight quick connect and one 90-degree quick connect to each of the supplied PCV hoses (P/N: 2414-6757, 2414-6758). Use the supplied hose camps (P/N: CTB24STFK) to attach the fi ttings.

4. Install the J-clip (P/N: 95210A175) into the air box tray as shown.

5. Install the grommet (P/N: 9600K53) into the air box tray (P/N: 2414-9A612) as shown.

6. Place the bulb seal (P/N: 2414-9B624) onto the top of the air box (P/N: 2414-9A612) and clip into the holes. Trim ends as required.

7. Clean off the fender well, then attach the air box inlet seal (P/N: 2414-9F673) as shown.

8. Insert the air box assembly into the vehicle, push down to seat the posts into the grommets.

9. Thread and tighten the provided M6 bolt (P/N: N605891-S437) into the bottom of the air box. Tighten to 10 Nm.

10. Insert the fi lter tube (P/N: 131550-12B579HC) into the air box tray.

11. Install the air fi lter (P/N: 997-494-BLK) onto the fi lter tube. Make sure the metal rib on the fi lter points down when the fi lter tube is oriented as shown. Tighten the fi lter clamp to 3 Nm.

12. Install the MAF sensor into the fi lter tube. Tighten the screws to 2 Nm.

13. Using the two (2) M8 bolts (P/N: W500224), attach the fi lter tube to the air box. Tighten to 10 Nm.

14. Tighten the hose clamp attaching the clean air tube to the fi lter tube. Tighten to 3 Nm.

15. Tighten the clamp retaining the coupler to the throttle body. Tighten to 3 Nm.

16. Install the driver side PCV hose (P/N: 2414-6758) between the quick connect barbs on the valve cover and clean air tube assembly.

17. Install the passenger side PCV hose (P/N: 2414- 6757) between the quick connect barbs on the valve cover and clean air tube assembly.

18. Reinstall the support brace between the core support and fender.

19. The installation is now complete!

NOTE: Remove all of the protective plastic fi lm from the muffl er (P/N: 1115-5230) before installing.

2. Place one (1) 3” clamp (P/N: 10-0439) onto the inlet side of the over-axle pipe. Install the muffl er (P/N: 1115-5230) on the inlet side of the over-axle pipe until it completely bottoms out. Position the clamp on the joint and tighten to 30 Nm.

3. There are two (2) pipes provided in the kit to account for the four (4) different wheel base confi gurations. Trimming of this inlet pipe will be required for each specifi c vehicle. To mark the cut point on the inlet pipe, the muffl er and over- axle pipe should be in position (rubber hangers are positioned vertically). Using the correct inlet pipe (P/N: 5-46, 119” and 133” WB, 4.3L/5.3L), (P/N: 5-47, 143.5” and 153.5” WB, 4.3L/5.3L), (P/N: 5-68, 119” and 133” WB, 6.2L) or (P/N: 5-69, 143.5” and 153.5” WB, 6.2L) for the vehicle wheel base, temporarily install the ball fl are end of the inlet pipe against the catalyst fl ange and mark the inlet pipe, accounting for the 2-1/2” engagement into the muffl er inlet for a proper seal. Remove the inlet pipe and cut it with a suitable cutting tool.

4. Place one (1) 3” clamp (P/N: 10-0439) onto the end of the trimmed inlet pipe and insert it into the muffl er inlet. Loosely connect the ball fl ange to the catalyst fl ange using the ball fl ange clamp provided (P/N: 93-0088, 4.3L/5.3L) or (P/N: 05958081075, 6.2L). Insert the hanger into the factory rubber hanger mount. On 119” and 133” wheel base confi gurations, there will be an additional hanger located in front of the muffl er. Use the correct hanger for use on the vehicle. Install the hanger clamp (P/N: 6-1, 119” WB) or (P/N: 6-2, 133” WB) on the pipe in position to support the exhaust. Position the clamps on the joint and tighten to 30 Nm.

5. Install one (1) 3” clamp (P/N: 10-0439) over the outlet of the over-axle pipe and install the tip (P/N: 310305787) onto the outlet end of the overaxle pipe. Position and orient the tip to the desired location. Position the clamp on the joint and tighten to 30 Nm.