2020 Chevrolet Silverado 4500 HD Service and Repair Manual
This factory service and repair manual for the 2020 Chevrolet Silverado 4500 HD describes a bare working chassis: two cab and chassis configurations, Base trim, and the turbocharged 6.6L diesel V8 of 403 cubic inches. Trucks like this are finished by a body builder, so the sections that get opened are the ones covering what runs the length of the frame — fuel lines, electrical distribution, driveline and brakes — and each is documented with its own procedures, specifications, torque values, wiring diagrams and diagnostic steps.
Engines covered
- 6.6L V8 (403 cu in) — OHV, turbocharged, diesel
Body styles covered
- 4-door cab & chassis, crew cab
- Cab & chassis, conventional
Trims covered
- Base
Known issues on the 2020 Silverado 4500 HD. Two recalls are on the federal record, and both are braking faults. In one, the brake pressure sensor assembly can leak fluid into the pressure switch, shorting the circuit and letting it overheat until a fire starts, whether the truck is moving or parked. In the other, a brake jumper wire harness was assembled without its protective tape, so the wires chafe and power brake assist can be lost. A single complaint is recorded, against the power train. Brake hydraulics and circuit testing are both specified here.
