2024 GMC Sierra 2500 HD AT4, 6.6L Eng VIN 7FACTORY OEM SERVICE PROCEDURE

Grind Complete

Includes: Remove carbon, check surfaces for warpage, reface or replace Valves, resurface Valve Seats and clean Valve Guides. Adjust Valves (where applicable).

Applies ToNoteStandard HoursWarranty HoursSkill Level
Gas, w/Dual AlternatorsIncludes: R&I Fender Liners. Includes: R&I Oil Level Indicator Tube. Includes: R&I Exhaust Manifolds. Includes: R&I Air Cleaner. Includes: R&I Alternator. Includes: R&I Intake Manifold. Includes: R&I Valve Covers. Includes: Drain and refill Cooling System. Includes: Replace Oil and Filter. Includes: Reset Oil Life Monitor.17.9A
Gas, w/Single AlternatorIncludes: R&I Fender Liners. Includes: R&I Oil Level Indicator Tube. Includes: R&I Exhaust Manifolds. Includes: R&I Air Cleaner. Includes: R&I Alternator. Includes: R&I Intake Manifold. Includes: R&I Valve Covers. Includes: Drain and refill Cooling System. Includes: Replace Oil and Filter. Includes: Reset Oil Life Monitor.17.7A
Combination Procedure: THROTTLE BODY ASSEMBLY: Reset:
Gas, Throttle Body Idle Air Flow Compensation ResetIncludes: Additional time for use of scan tool to perform this procedure.0.2B
Combination Procedure: VALVE LIFTERS: Remove & Replace:
All0.5B
Combination Procedure: VALVE LIFTERS (REMOVED): Clean:
Each Additional0.1B
One0.2B
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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