2012 Chevrolet Express 2500 Service and Repair Manual

This factory service and repair manual for the 2012 Chevrolet Express 2500 covers a van with a diesel and two alternative-fuel-capable gasoline V8s: the turbocharged 6.6L of 403 cubic inches, the flex-fuel 4.8L of 294, and the 6.0L of 364 built for either compressed natural gas or E85 and gasoline. All five body configurations and all three trims are documented. Fuel system work therefore depends on which van is on the lift, and the specifications, pressures and diagnostics are given per configuration.

Engines covered

• 6.6L V8 (403 cu in) — OHV, turbocharged, diesel
• 4.8L V8 (294 cu in) — OHV, naturally aspirated, flex-fuel
• 6.0L V8 (364 cu in) — OHV, naturally aspirated, CNG or flex-fuel

Body styles covered

• 3-door extended cargo van
• 3-door standard cargo van
• 4-door standard passenger van
• 3-door standard passenger van
• 4-door standard cargo van

Trims covered

• Base
• LS
• LT

Known issues on the 2012 Express 2500. Thirteen complaints make up the owner record for this model year, the largest clusters being a pair each against the electrical system, the fuel and propulsion system and the steering. Nothing there rises to a pattern, but each maps to a section worth reading before work starts. The wiring diagrams identify grounds, splices and connectors; the fuel chapters give delivery and rail pressures for the gasoline, flex-fuel, natural gas and diesel arrangements; and the steering material covers gear, pump and linkage service with the torque value each fastener takes.