2025 Chevrolet Silverado 1500 Service and Repair Manual

Diesel buyers get the biggest change for 2025: the Silverado 1500's 3.0L Duramax moves to the second-generation LZ0 inline-six, with more horsepower and torque than the engine it replaces. Otherwise the half-ton continues with the turbocharged 2.7L four and the 5.3L and 6.2L V8s across WT, Custom, Custom Trail Boss, LT, LT Trail Boss, RST, LTZ, High Country and ZR2, plus the PPV police pickup. The engine change alters fuel system, emission control and cooling specifications for diesel trucks, so this factory service and repair manual is matched to 2025 production, with procedures, torque values, wiring diagrams, diagnostics and maintenance schedules for every cab.

Engines covered

• 2.7L inline-four — DOHC, turbocharged, gasoline
• 3.0L inline-six — DOHC, turbocharged, diesel
• 5.3L V8 — OHV, naturally aspirated, gasoline
• 5.3L V8 — OHV, naturally aspirated, flex-fuel
• 6.2L V8 — OHV, naturally aspirated, gasoline

Body styles covered

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

Trims covered

• Custom
• Custom Trail Boss
• High Country
• LT
• LT Trail Boss
• LTZ
• PPV
• RST
• WT
• ZR2

Known issues on the 2025 Silverado 1500. No recalls are on federal record in the NHTSA data held for this year, but owners have lodged 100 complaints, with the engine, the electrical system and the power train the most frequent subjects. Engine mechanical, driveline and body electrical diagnostics are all set out in this manual with the relevant torque values and wiring diagrams.