2020 Ram 4500 Service and Repair Manual

This factory service and repair manual for the 2020 Ram 4500 covers a truck offered with gasoline or diesel power. The gasoline engine is a 6.4L V8 displacing 392 cubic inches without a turbocharger; the diesel, a 6.7L inline-six of 408 cubic inches that has one. Both carry overhead valves. The truck appears as a 4-door crew cab and chassis or a conventional cab and chassis, in Base trim only. Procedures, specifications and wiring diagrams follow both engines, the chassis systems and the electrical system.

Engines covered

• 6.4L V8 (392 cu in) — OHV, naturally aspirated, gasoline
• 6.7L inline-six (408 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 4500. There are 6 recalls for the 2020 4500. On certain 2020 Ram 4500 trucks the windshield wiper arms could work loose, leaving the wipers unable to clear the glass properly in bad weather; dealers tightened the nuts. Certain trucks might have rear brake hoses with too small an inside diameter, which could burst. Certain trucks with the High Output 6.7L diesel ran engine software that might not warn of low oil volume, risking engine damage and a fire; a calibration update followed. Of the 4 complaints filed, 2 cited visibility. Wiper, brake and engine procedures, torque values and wiring diagrams are covered.