This factory service and repair manual for the 2004 GMC T6500 covers one engine and one chassis designation: a 7.8L turbocharged inline-six diesel of 475 cubic inches, in the T6F042 chassis. With no second engine to separate out, the engine sections run straight through mechanical service and fueling for that one unit, and the driveline, brakes, steering, suspension, chassis and body are documented in the same system order, each with its own specifications, torque values, wiring diagrams and diagnostics.
Engines covered
- 7.8L inline-six (475 cu in) — turbocharged, diesel
Trims covered
- T6F042
Known issues on the 2004 T6500. This model year comes through the federal record clean, with no recalls and no owner complaints logged with NHTSA. That leaves the manual to earn its place on ordinary work: the 7.8L turbocharged diesel six with its overhaul specifications and torque values, the brake and steering figures a medium-duty chassis is held to, and the wiring diagrams and diagnostic procedures for the rest of the truck. A clean record makes none of those repairs easier; it simply means the technician starts from the symptom.
This PI communicates the requirement to provide a pico file to receive diagnostic assistance from TAC.
This Preliminary Information communication provides information to the technician about changing the tire and wheel size on vehicles. General Motors will only support a tire calibration for tires that have been sized, tested and designed fo
Vehicle Wide Programming (VWP) is a new process to update software on GM Vehicles. It provides the ability via a single selection within Techline Connect to first identify which modules need updating and then proceed to updating affected mo
GM is receiving damaged (cracked or broken) transmission cores returned to the reman facilities. The damage is being caused either in the removal process by the technician, or inadequate packaging or shipping. This bulletin advises the deal
This service bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how Top Tier fuels should
This bulletin provides information for use on a Product Assistance Claim (PAC), which is formerly known as a Product Allegation Resolution (PAR) claim.
This Warranty Administration bulletin provides retail and wholesale service personnel with the policies/procedures and the warranty transaction submission procedures that support the Personal Property Damage process.
This bulletin provides information for electrical ground repairs using new General Motors replacement fasteners with conductive finish.
Showing the 8 most recent of 72 technical service bulletins on file with NHTSA.
