1974 GMC Truck Wiring Diagrams Supplement

Original Factory Soft Cover Manuals from GMC in Good Condition: This manual contains wiring diagrams which were revised effective with the start of 1974 production to reflect engineering changes in rear lighting and optional horn circuitry.

Truck Series Effected:

• MH-9003; MH-9500
• DH/DI/FH/FI-9003, -9502
• DP-9003ND, DP-9502ND
• DB9003PB; DB9502PB
• FB-9003R5; FB9502R5
• DC/DN/FC/FN-9003; 9502

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