2024 GMC Sierra 2500 HD Service and Repair Manual
2024 GMC Sierra 2500 HD service and repair manual — a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.
Designed for technicians and DIY owners, this manual helps you troubleshoot accurately, follow step-by-step repair procedures, and reference wiring diagrams and system sections quickly while you work.
What’s included
- Step-by-step repair procedures and service information
- Specifications and reference data (where provided)
- Wiring diagrams and electrical sections
- Powertrain, brakes, steering, suspension, HVAC and more
Trims covered
- AT4 Crew Cab Pickup 4-Door
- Denali Ultimate Crew Cab Pickup 4-Door
- SLT Crew Cab Pickup 4-Door
- Denali Crew Cab Pickup 4-Door
- Pro Extended Cab Pickup 4-Door
- SLE Crew Cab Pickup 4-Door
- AT4X Crew Cab Pickup 4-Door
- Pro Crew Cab Pickup 4-Door
- SLE Extended Cab Pickup 4-Door
- Denali
- SLE Standard Cab Pickup 2-Door
- Pro Standard Cab Pickup 2-Door
Engines covered
- 6.6L 6599CC 403Cu. In. V8 DIESEL OHV Turbocharged
- 6.6L 6571CC 401Cu. In. V8 GAS OHV Naturally Aspirated
- 6.6L 6571CC 401Cu. In. V8 FLEX OHV Naturally Aspirated
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Index / Table of contents
- Body
- Brakes
- Chassis Electrical
- Driveline
- Engine Cooling
- Engine Electrical
- Engine Mechanical
- Engine Performance & Emission Controls
- Fuel System
- General Information & Identification
- Heating, Ventilation, & Air Conditioning
- Hybrid & Electric Vehicle Systems
- Steering
- Suspension
- Transmission, Clutch, & Transfer Case
- Wiring Diagrams
This informational bulletin provides a guide on how to diagnose and test for vibrations utilizing the PicoScope.
This Preliminary information communicates information informing dealers that replacment PSCM P/N86554464 stock has been reworked to prevent the SPS programming failure.
This informational bulletin explains Unscheduled Supplemental Services and the importance of GM Simplified Maintenance Schedules.
This Preliminary information communicates recovery procedure after return to dealer message.
This informational bulletin provides an optional repair using a different set of brakes that may correct the customers concern of Early Brake Wear in Harsh Environments.
This bulletin provides a procedure on how to check for a battery drain utilizing the Picoscope and how to measure the load on the system that may be causing a drain.
This bulletin provides information on how to look for and test for DEF or water in the fuel system and what the specs should be.
The contact owned a 2024 GMC Sierra 2500 HD. The contact stated that after parking the vehicle at night and plugging in the engine block heater to a standard 110-Volt outlet with an extension cord; 15
