This factory service and repair manual for the 2018 GMC Savana 4500 belongs to a truck defined partly by what it is missing, since a two-door cutaway has no rear body and Base is the only trim. The powertrain is a single 6.0L naturally aspirated overhead-valve V8 of 364 cubic inches, able to run gasoline or flex fuel. Everything documented here, engine, chassis and wiring, is the part of the vehicle GMC actually built, before the upfitter took over the back half.
Engines covered
- 6.0L V8 (364 cu in) — OHV, naturally aspirated, gasoline or flex-fuel
Body styles covered
- 2-door cutaway
Trims covered
- Base
Known issues on the 2018 Savana 4500. This model year is clean federally, without a single recall or owner complaint recorded. The manual is accordingly a maintenance and repair reference rather than a fault guide, and it covers the 6.0L V8 in both its gasoline and flex-fuel forms with procedures, specifications and torque values, then carries the same treatment through the base-vehicle wiring diagrams and diagnostic routines that a shop needs when the body on the back is not GMC's own.
