1978 Chevy & GMC P10 P20 P30 Step Van Color Wiring Diagram
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- Covers P10 P20 P30 Step Van
- Complete basic truck included (engine bay, interior and exterior lights, under dash harness, starter and ignition circuits, instrumentation, etc)
- Original factory wire colors including tracers when applicable
- Large size, clear text, easy to read
- Laminated for ease of use