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  • PPE Dual Fueler CP3 Pump Kit Installation – LLY Duramax

Installation guide for the PPE Dual Fueler CP3 pump kit, part #113062000, for LLY Duramax trucks. Adding a second CP3 injection pump supplies the extra fuel volume needed for high-horsepower builds. This guide covers the supplied parts, dual idler pulleys and high-pressure fuel-line routing.

Download the Original PDF Manual

IMPORTANT: Please note the supplied part numbers below — they are referenced throughout the installation descriptions (for example, “#4 high pressure line” or “#20 mounting bracket”).

Supplied Parts

  1. Control Module
  2. 3/8″ Inlet Fuel Line with attached 1/2″ x 1/2″ x 3/8″ ‘T’ connector
  3. 5/16″ Return Fuel Line with attached 5/16″ x 5/16″ x 5/16″ ‘T’ connector
  4. High Pressure Steel Fuel Supply Line
  5. Two Idler Pulleys with bolts
  6. Assembled CP3 Pump, Wheel, and bracket
  7. Fuel Rail Fitting
  8. 6-Rib Belt
  9. Oil Filler Tube
  10. 2 #6 hose clamps
  11. 6 #4 hose clamps (4 already on hoses)
  12. 2 M10-1.5×100 bolts with 2 washers
  13. Control Module Internal Engine Pump connectors
  14. Control Module Dual Fueler connector
  15. Control Module +12V (Red Wire)
  16. Control Module Ground (Black Wire)
  17. Control Module Fuse 10A
  18. Control Module Harness Tie Straps
  19. Control Module Mounting Screws
  20. Two Fuel Supply Line Mounting Brackets
PPE Dual Fueler CP3 Pump Kit for LLY Duramax – supplied parts diagram with numbered components
Supplied parts, numbered to match the list above — control module (#1), fuel lines (#2, #3, #4), assembled CP3 pump and wheel (#6), idler pulleys (#5), belt (#8), oil filler tube (#9), clamps, bolts and brackets.

Tools & Torque Specifications

  • 500E Torx wrench or socket (the type used on seatbelt bolts) — for the fuel rail plug
  • #5 Idler Pulley (P1, engine bracket): 27 lb-ft
  • #4 High pressure line nut, pump and fuel rail ends: 30 lb-ft
  • #6 Dual Fueler bracket assembly to A/C compressor (#12 bolts): 37 lb-ft
  • #9 Replacement oil filler tube: 15 lb-ft
  • Fuel injection pump drive pulley nut (Appendix B): 52 lb-ft
NOTE: First, install the “Dual Fueler” bracket and the pulley if they are not already assembled on the pump. Refer to Appendix B below before starting the steps below.

Installation

Steps 1–6: Idler Pulleys, Drain & Fuel Rail Fitting

  1. Remove the belt and install one #5 Idler Pulley at location P1, in the existing threaded hole on the engine bracket (as shown below). Torque to 27 lb-ft.
  2. Remove the factory idler pulley in location P2.
  3. Remove bolt Y from location P2.
  4. Grind off the top of bolt Y until the ridge of the bolt is gone (see the example photo), then replace bolt Y and install the second #5 Idler Pulley in location P2. Shaving the top of bolt Y keeps the #5 idler pulley from catching on it.
  5. Drain the coolant from the radiator drain plug. Remove the alternator. Remove the EGR by disconnecting the in and out hoses first.
  6. Remove the plug from the end of the fuel rail with a 500E Torx wrench or socket, and install #7, the Fuel Rail Fitting.
Steps 1 to 6: installing #5 idler pulleys at P1 and P2, grinding bolt Y, and the fuel rail fitting
Idler pulley locations P1 and P2, removing and grinding bolt Y, and the fuel rail fitting (#7). The photos show the #4 high-pressure line already installed for reference.

Steps 7–11: High-Pressure Line, A/C Compressor & Pump Bracket

  1. Remove the intake manifold to lay the #4 high pressure line between the intake manifold and EGR (as shown).
  2. Install the #20 bolt-on brackets to the #4 high pressure line as shown — to thermostat housing bolt Q and to stud R next to the fuel filter bracket.
  3. Remove the 4 A/C bolts as shown, and set the A/C compressor to the left of the engine to access the fuel return line.
  4. Locate the stock return line D from the stock CP3 pump. Cut the rubber hose and insert the #3 5/16″×5/16″×5/16″ ‘T’ connector. Use #11 hose clamps to secure.
  5. Replace the A/C compressor and reinstall the factory bolts on the left-hand side. Place #6 (the Dual Fueler assembly bracket with pump) on top of the right A/C compressor bolt holes on the right-hand side. Use #12 bolts to attach the Dual Fueler bracket assembly to the A/C compressor; torque to 37 lb-ft. Save one original A/C bolt for the next step.
IMPORTANT: If the #20 brackets are not installed properly, the high pressure line will resonate and it will fail!
Steps 7 to 11: routing the #4 high-pressure line, installing #20 brackets at Q and R, removing the A/C compressor and mounting the Dual Fueler pump bracket
Routing the #4 high-pressure line, securing the #20 brackets to bolt Q and stud R, removing the four A/C compressor bolts, and the #3 ‘T’ connector in the stock return line.

Steps 12–17: Fuel-Line Connections & Wire Harness

  1. Install the one factory A/C bolt that you removed from the top of the A/C unit into the bottom of the Dual Fueler bracket.
  2. Attach the lines by part number: #3 Return Line, #4 High Pressure Line, and #2 Inlet Fuel Line (as shown).
  3. Torque the #4 high pressure line nut on both the pump and fuel rail ends to 30 lb-ft. Re-install the intake manifold.
  4. Follow the flow-direction arrow A exiting from the fuel filter housing to locate fuel supply hose B. Cut back the nylon sheathing on hose B. Cut the stock fuel supply line and insert the supplied #2 1/2″×1/2″×3/8″ ‘T’ connector between the 1/2″ fuel supply line; secure with #10 1/2″ hose clamps.
  5. Locate the stock CP3 pump C and the electronic control wire harness E. Unplug wire harness E.
  6. Plug wire harness E into #13, then plug the other end of #13 back into the stock CP3 pump C.
NOTE: After Step 15, all three lines should be connected to the Dual Fueler pump and to the engine in the correct spots.
Steps 12 to 17: attaching the return, high-pressure and inlet fuel lines, installing the #2 'T' connector, and connecting the #13 harness
Connecting the #3 return, #4 high-pressure and #2 inlet fuel lines; locating flow arrow A and supply hose B; and wiring the #13 connector between harness E and the stock CP3 pump C.

Steps 18–22: Control Module & Fuse Box

  1. Route the #1 Control Module wiring from the stock CP3 pump C (as shown) and attach it to the other wiring with #18 tie straps. Connect #14 to the back of the Dual Fueler CP3 pump.
  2. Temporarily remove the metal support G by removing the 4 bolts H, and set it aside to remove the fuse box cover F. The #1 Control Module will be tucked inside the fuse box cover F.
  3. Remove the fuse box cover F and place #1 (Control Module) as shown. (Photo is taken from the driver’s side of the vehicle.)
  4. Secure #1 with the #19 screws as shown.
  5. Replace the fuse box cover F, taking care not to pinch the wiring harness, then re-assemble stock parts G and H as shown in Step 18.
Steps 18 to 22: routing control module wiring, removing metal support G and fuse box cover F, and mounting the control module
Routing the #1 control module wiring, removing metal support G (bolts H) and fuse box cover F, then mounting and securing the control module with the #19 screws.

Steps 23–28: Oil Filler Tube, Belt, Power & Startup

  1. Remove the original oil filler tube and install the #9 replacement oil filler tube to allow for belt clearance, then assemble with the original bolts. Torque to 15 lb-ft.
  2. Route the #8 replacement belt as shown.
  3. Connect the #15 red wire to the 12V constant battery jumper terminal stud, then connect the #16 ground wire to the terminal stud mounting bolt as shown.
  4. Insert the 10 Amp fuse in #17.
  5. The engine should now be ready to start. Prime the fuel filter pump to bleed air from the system, then start the engine.
  6. Place the supplied Dual Fueler decal on the engine shield in the designated area for use during future smog testing.
Steps 23 to 28: replacement oil filler tube, #8 belt routing diagram, connecting power and ground wires, and the smog decal
Installing the #9 oil filler tube, the #8 replacement belt routing, connecting the #15 red (+12V) and #16 ground wires to the battery terminal studs, and placing the smog-test decal.

Appendix A: Troubleshooting

  • Engine noisy / too much fuel pressure: Check that the fuse is good and seated in the controller’s fuse holder, and that all power connections are secure — including that both pump connectors are fully plugged in.

Appendix B: Fuel Pump with Bracket Assembly

If the bracket and pulley are not already assembled on the pump, complete this assembly first.

  1. Install the main bracket and insert the 3 supplied bolts. Make sure the longer bolt L and the 2 shorter bolts S are used as shown.
  2. Install the smaller support bracket and secure it with a washer and nut on the back of the pump as shown. Secure the other 2 bolts S with a washer and nut on the back of the pump.
  3. Put the pulley on the pump by placing it on the pump with a washer and nut, then torque the fuel injection pump drive pulley nut to 52 lb-ft.
Appendix B: assembling the Dual Fueler pump bracket with bolts L and S, the smaller support bracket, and the drive pulley
Pump bracket assembly — the longer bolt L and shorter bolts S, the smaller support bracket, and the drive pulley with its drive pulley nut (torque to 52 lb-ft).
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