1978 Gmc K5 Blazer Instrument Cluster Wiring Diagram . Instrument cluster, seat belt & lights on buzzer, tbi torque converter clutch solenoid, auxiliary coolant fan relay, tbi fuel pump priming module, transmission kickdown relay and solenoid (m40), a.i.r. 2 common wiring diagram symbols. Silverado Instrument Cluster Wiring Diagram Complete Wiring Schemas from wiring89.blogspot.com 2008 gmc yukon instrument cluster wiring diagram. Passenger compartment fuse box diagram. On the left side of diagram and then progressing to the right is the engine, instrument panel, cab and taillight circuits can also be traced by.