Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2002 GMC C3500 HD 6.5 F, StandardFACTORY OEM SERVICE PROCEDURE
Installation Procedure
- Install the new flange gasket on the injection pump.
Important: Be sure the locating stud (1) on the injection pump hub goes into the slotted/elongated hole in the driven gear.
- Adjust the locating stud (1) to the proper position to match with the slotted/elongated hole in the driven gear.
- Install the injection pump making sure the locating stud is positioned within the slotted/elongated hole (1) in the driven gear.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.