2020 Chevrolet LCF 3500 Service and Repair Manual

This factory service and repair manual for the 2020 Chevrolet LCF 3500 has two engines to keep straight: the naturally aspirated 6.0L V8 of 364 cubic inches, which runs gasoline or flex fuel, and a naturally aspirated 6.6L V8 of 401 cubic inches on gasoline. Both are overhead-valve, both go into the same two bodies — the low tilt and low crew cab straight trucks in Base trim — and both have their own torque figures, clearances and diagnostic routines here, so identification comes before any engine procedure.

Engines covered

• 6.0L V8 (364 cu in) — OHV, naturally aspirated, gasoline or flex-fuel
• 6.6L V8 (401 cu in) — OHV, naturally aspirated, gasoline

Body styles covered

• Straight truck, low tilt
• Straight truck, low crew cab

Trims covered

• Base

Known issues on the 2020 LCF 3500. With two engines in the lineup, the manual's first job is identification and its second is precision: separate specifications, tightening sequences and diagnostic charts for the 6.0L and the 6.6L, then shared coverage of the cooling, charging, transmission, axle, brake, steering and suspension systems, with wiring diagrams for the cab and chassis circuits.