Keep your GMC Sierra 2500/3500 (2014–2019) running at its best with the Haynes Repair Manual—trusted by millions of DIYers worldwide. Whether you're changing fluids, replacing brakes, or tackling advanced repairs, this manual provides clear, step-by-step guidance backed by hundreds of detailed photos and illustrations.
Models covered include both gasoline and diesel options: 6.0L LC8, 6.0L L96, 6.6L LML, and 6.6L L5P engines. Alongside in-depth repair procedures for the engine, transmission, and drivetrain, the manual also features complete coverage of electrical systems, body components, suspension, and brakes.
Plus, with included digital access, you'll unlock enhanced content such as interactive wiring diagrams, guided diagnostics, and up-to-date service data—accessible anytime from your computer, tablet, or smartphone.
With over 60 years of expertise, Haynes helps you save money, gain confidence, and keep your Sierra safe and reliable for years to come.

Table of Contents

Jacking and Lifting
Buying Parts
Booster Battery (Jump) Starting
Key Fob Battery Replacement
Lubricants, Fluids, and Tire Pressures
Troubleshooting
Acronyms
Chapter 1A – Routine Maintenance and Servicing (Gasoline Models)
Chapter 1B – Routine Maintenance and Servicing (Diesel Models)
Chapter 2A – Gasoline Engine Repair Procedures
Chapter 2B – LML Diesel Engine Repair Procedures
Chapter 2C – L5P Diesel Engine Repair Procedures
Chapter 3 – Cooling, Heating, and Air Conditioning Systems
Chapter 4A – Fuel and Exhaust (Gasoline Engines)
Chapter 4B – Fuel and Exhaust (LML Diesel Engines)
Chapter 4C – Fuel and Exhaust (L5P Diesel Engines)
Chapter 4D – Emission Control (Gasoline Engines)
Chapter 4E – Emission Control (LML Diesel Engines)
Chapter 4F – Emission Control (L5P Diesel Engines)
Chapter 5A – Starting and Charging Systems
Chapter 5B – Ignition System (Gasoline Engines)
Chapter 5C – Pre-Heating System (Diesel Engines)
Chapter 6 – Clutch
Chapter 7A – Manual Transmission
Chapter 7B – Automatic Transmission
Chapter 7C – Transfer Case
Chapter 8 – Driveshafts, Driveaxles and Axles
Chapter 9 – Braking System
Chapter 10 – Suspension and Steering Systems
Chapter 11 – Bodywork and Fittings
Chapter 12 – Body Electrical System
Chapter 13 – Wiring Diagrams
Index