This factory service and repair manual for the 2013 GMC Savana 4500 covers a 6.0L overhead-valve V8 that could be built for compressed natural gas or flex fuel, and a turbocharged 6.6L diesel V8 of 403 cubic inches. Those two engines are the whole of the choice, because the 4500 is listed in one body style, the two-door cutaway, and one trim, Base. The fuel-system differences between the gas and diesel installations are substantial, and the manual keeps their specifications separate.
Engines covered
- 6.6L V8 (403 cu in) — OHV, turbocharged, diesel
- 6.0L V8 (364 cu in) — OHV, naturally aspirated, CNG or flex-fuel
Body styles covered
- 2-door cutaway
Trims covered
- Base
Known issues on the 2013 Savana 4500. Federal records list no recalls for this model year and no owner complaints from the people who drive it. What the manual is left to do is the alternative-fuel work in particular: a 6.0L built for compressed natural gas is not serviced like a flex-fuel one, and neither resembles the turbocharged diesel. Procedures, specifications, torque values, wiring diagrams and diagnostics are given per engine, with the cutaway chassis covered as the base vehicle underneath whatever body the upfitter installed.
