PPE Dual Fueler CP3 Pump Kit – LB7 Duramax

Installation guide for the PPE Dual Fueler CP3 pump kit, part #113061100, for LB7 Duramax trucks. Adding a second CP3 injection pump supplies the extra fuel volume needed for high-horsepower builds. This guide covers the supplied parts, control module and high-pressure fuel-line routing.

Download the Original PDF Manual

This Dual Fueler kit is 50-state emissions legal.

IMPORTANT: Throughout this guide, items are referred to by their kit part number (for example, “#4” is the High Pressure Steel Fuel Supply Line). Please note these part numbers — they are used in the installation descriptions below.

Kit Contents (Supplied Parts)

1. Control Module Pulley
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. Idler Pulley with attached parts (2002–04 models only — see Appendix C)
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 x 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 10A fuse
18. Control Module harness tie straps
19. Control Module mounting screws

PPE Dual Fueler CP3 Pump Kit supplied parts diagram with numbered components — Supplied parts, numbered to match the kit contents list and the installation steps below.

Torque Specifications

Idler pulley (#5) into engine bracket — 27 lb-ft
Dual Fueler bracket assembly to A/C compressor (#12 bolts) — 37 lb-ft
#4 High Pressure line nuts (both ends) — 30 lb-ft
Replacement Oil Filler Tube (#9) bolts — 15 lb-ft
Fuel injection pump drive pulley nut (Appendix B) — 52 lb-ft

Before You Begin

If the Dual Fueler bracket and pulley are not already assembled on the CP3 pump (#6), assemble them first — see Appendix B at the end of this guide.

NOTE: This guide covers 2002–2004 LB7 trucks. For 2001 models, the idler-pulley location and belt routing differ — see Appendix C.

Installation

Step 1 — Install the idler pulley (2002–04)

On 2002–04 models, remove the belt and install the #5 Idler Pulley in the existing threaded hole on the engine bracket as shown. Torque to 27 lb-ft. (2001 models: refer to Appendix C.)

Idler pulley installed in the threaded hole on the engine bracket — Fig. 1 — Install the #5 idler pulley in the existing threaded hole on the engine bracket.

Step 2 — Move the A/C compressor

Remove the 4 A/C bolts as shown and set the A/C compressor to the left of the engine so you can access the fuel rail below.

The four A/C compressor mounting bolts circled — Fig. 2 — Remove the four circled A/C compressor bolts and set the compressor aside.

Step 3 — Install the fuel rail fitting

Remove the plug from the end of the fuel rail using an E500 (used on seatbelt bolts) Torx wrench or socket, then install #7, the Fuel Rail Fitting.

IMPORTANT: Early-model LB7 trucks may have a block-off plate behind the Torx plug fitting. If so, remove this block-off plate and drill it out to the same size as the supplied fuel rail adapter fitting.

Fuel rail fitting location at the end of the fuel rail — Fig. 3 — Remove the rail end plug and install #7, the Fuel Rail Fitting.

Step 4 — Clear access and start the high-pressure line

Drain the coolant from the radiator drain plug. Remove the alternator. Remove the EGR by first disconnecting the in and out hoses. Remove the Water Line (W) so you can access the #4 steel high-pressure line later, once the A/C compressor is back in place and the Dual Fueler is installed.

Attach #4, the steel high-pressure line, but do not torque it yet. Route it so it will lay under the A/C compressor.

High pressure steel line routed under the A/C compressor area, with water line W and spacer noted — Route the #4 high-pressure line so it lays under the A/C compressor. (Ignore the spacer shown at right.)

Step 5 — Mount the Dual Fueler assembly

Place the A/C compressor back into its original position. Set #6, the Dual Fueler assembly (bracket with pump), on top of the right A/C compressor bolt holes and use the #12 bolts to attach the Dual Fueler bracket assembly to the A/C compressor. Torque to 37 lb-ft. Save one of the original A/C bolts for the next step.

Step 6 — Install the lower bracket bolt

Install one factory A/C bolt (removed from the top of the A/C unit) into the bottom of the Dual Fueler bracket.

Factory A/C bolt installed into the bottom of the Dual Fueler bracket — Install one factory A/C bolt (circled) into the bottom of the Dual Fueler bracket.

Step 7 — Torque the high-pressure line and reinstall the water line

Torque the #4 high-pressure line nut onto both ends to 30 lb-ft. Then re-install the Water Line (W) (see Fig. under Step 4).

Step 8 — Connect the fuel lines

Attach the lines by part number as shown:

#2 — Inlet Fuel Line
#3 — Return Line
#4 — High Pressure Line

Inlet, return and high pressure fuel lines connected to the Dual Fueler pump — #2 Inlet, #3 Return and #4 High Pressure lines connected at the Dual Fueler pump.

Step 9 — Locate the fuel supply hose

Follow the flow-direction arrow (A) exiting from the fuel filter housing in order to locate the fuel supply hose (B).

Fuel filter housing flow arrow A and fuel supply hose B — Follow flow arrow A out of the fuel filter housing to locate supply hose B.

Step 10 — Splice in the inlet ‘T’ connector

Cut back the rubber sleeve (B). Cut the stock fuel supply line and insert the supplied #2 1/2″ x 1/2″ x 3/8″ ‘T’ connector in between the 1/2″ fuel supply line. Secure with #10 1/2″ hose clamps.

Inlet T connector spliced into the stock 1/2 inch fuel supply line — Splice the #2 ‘T’ connector into the stock 1/2″ fuel supply line and secure with #10 hose clamps.

Step 11 — Splice in the return ‘T’ connector

Locate the stock CP3 pump (C) and the stock return line (D) from the stock CP3 pump. Cut the rubber hose and insert the #3 5/16″ x 5/16″ x 5/16″ ‘T’ connector. Use #11 hose clamps to secure.

Stock CP3 pump C and stock return line D — Stock CP3 pump (C) and stock return line (D) — cut the hose and insert the #3 ‘T’ connector.

NOTE: All three lines should now be connected to the Dual Fueler pump and to the engine in the correct spots.

Wiring & Control Module

Steps 12–13 — Splice the engine pump connector

Locate the stock CP3 pump (C) from Step 11 and the electronic control wire harness (E). Unplug wire harness E. Plug harness E into #13, then plug the other end of #13 back into the stock CP3 pump C.

Stock CP3 pump C and electronic control wire harness E — Unplug harness E from the stock CP3 pump C and connect the #13 connectors in between.

Step 14 — Route the control module wiring

Route the #1 Control Module wiring from the stock CP3 pump (C) as shown and attach to the other wiring with #18 tie straps. Connect #14 to the back of the Dual Fueler CP3 pump.

Control module wire routing from the CP3 pump — Route the control module wiring and secure with #18 tie straps.

Step 15 — Remove the metal support and fuse box cover

Temporarily remove Metal Support (G) by removing the 4 bolts (H); set them aside. This lets you remove the fuse box cover (F) — the #1 Control Module will be tucked inside the fuse box cover F.

Metal support G, mounting bolts H and fuse box cover F — Remove Metal Support G (4 bolts H) to access the fuse box cover F.

Step 16 — Place the control module

Remove the fuse box cover (F) and place #1 (Control Module) as shown.

Control module #1 positioned at the fuse box — Position the #1 Control Module at the fuse box (photo taken from the driver’s side of the vehicle).

Step 17 — Secure the control module

Secure #1 with the #19 screws as shown.

Control module secured with mounting screws — Secure the #1 Control Module with the #19 screws.

Step 18 — Reassemble the fuse box and support

Replace the fuse box cover (F), taking care not to pinch the harness, and reassemble the stock parts G and H as shown in Step 15.

Belt, Oil Filler & Power

Step 19 — Replace the oil filler tube

Remove the original oil filler tube and install #9, the Replacement Oil Filler Tube, to allow for belt clearance. Assemble with the original bolts and torque to 15 lb-ft.

Oil filler tube and water line area with mounting points indicated — Install the #9 Replacement Oil Filler Tube to provide belt clearance; torque the original bolts to 15 lb-ft.

Step 20 — Route the replacement belt

Route the #8 Replacement Belt as shown for 2002–04 models. (For 2001 models, refer to Appendix C.)

Replacement belt routing for 2002-2004 Duramax models — #8 Replacement belt routing shown for 2002–2004 models.

Step 21 — Connect power and ground

Connect the #15 red wire to the 12V constant battery jumper terminal stud, and ground the #16 wire to the terminal stud mounting bolt as shown.

Red power wire and ground connected at the battery terminal stud — Connect the #15 red wire to the 12V constant stud and ground the #16 wire to the stud mounting bolt.

Step 22 — Install the fuse

Insert the 10 Amp fuse into #17.

Step 23 — Prime and start

The engine should now be ready to start. Prime the fuel filter pump to bleed air from the system, then start the engine.

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. Confirm the connectors for both pumps are fully plugged in.

Appendix B: Fuel Pump with Bracket Assembly

If the bracket and pulley are not already assembled on the CP3 pump, assemble them as follows:

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.
Install the smaller support bracket and secure it with a washer and nut on the back of the pump. Secure the other 2 bolts (S) with a washer and nut on the back of the pump.
Put the pulley on the pump, placing it on with the washer and nut, and torque the fuel injection pump drive pulley nut to 52 lb-ft.

Main bracket with longer bolt L and shorter bolts S installed on the CP3 pump — Step 1 — Main bracket with longer bolt L and the two shorter bolts S.

Smaller support bracket secured to the back of the CP3 pump — Step 2 — Install the smaller support bracket and secure with washer and nut.

PPE Dual Fueler drive pulley and pulley nut installed on the CP3 pump — Step 3 — Install the pulley and torque the drive pulley nut to 52 lb-ft.

Appendix C: 2001 Installation

For 2001 installs, move the factory idler pulley from location I1 to location I2. No other idler pulleys are required. Route the belt as shown.

2001 idler pulley relocation from position I1 to I2 with belt routing — 2001 models — move the factory idler pulley from location I1 to location I2 and route the belt as shown.

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