Detailed wiring diagram for GM instrument clusters. Learn the pinout configuration and understand the connections for accurate diagnostics and repairs.. The Electrical section of the 2003 & 2004 Medium Duty C Series Body Builder Manual is not split between Family 2 and Family 3 trucks. The Electrical systems are common between the families. Any family specific requirements are called out in the attached documentation. This document is organized as follows:
Downloadable PDF service manuals, repair manuals, schematics, parts lists, circuit diagrams, disassembly, troubleshooting and service menu guides for hundreds of electronics brands.. Chevy and GMC Duramax Diesel Forum