2019 GMC Sierra 2500 HD Service and Repair Manual

This factory service and repair manual for the 2019 GMC Sierra 2500 HD lists gasoline, CNG and flex fuel for the 6.0L overhead-valve V8 of 364 cubic inches, with the 6.6L turbocharged diesel V8 of 403 cubic inches as the alternative. The truck came as a 2-door standard cab pickup, a 4-door crew cab pickup or a 4-door extended cab pickup in Base, Denali, SLE and SLT trim. Each fuel setup, cab and engine has its own procedures, specifications, torque values, wiring diagrams and diagnostics inside.

Engines covered

• 6.6L V8 (403 cu in) — OHV, turbocharged, diesel
• 6.0L V8 (364 cu in) — OHV, naturally aspirated, gasoline or CNG or flex-fuel

Body styles covered

• 2-door standard cab pickup
• 4-door crew cab pickup
• 4-door extended cab pickup

Trims covered

• Base
• Denali
• SLE
• SLT

Known issues on the 2019 Sierra 2500 HD. Roof-rail air bag inflators account for four of this truck's seven federal recalls, their end caps liable to detach or their sidewalls to rupture, releasing compressed gas and projecting hardware into the cabin. Two more involve an optional engine-block heater cord that can short circuit, damaging engine parts and raising a fire risk. The last describes a rear fuel tank on dual-tank trucks that can collapse and stop fuel transferring forward, stalling the engine. Owners logged 32 complaints, spread across the electrical system, the fuel system and the engine, all systems this manual diagnoses in detail.