TCM to transmission pinout/diagram?

2006 CHEVROLET 3500

170,000 MILES • 6.6L • V8 • 4WD • AUTOMATIC

JAYJAY1985

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hi I'm looking for a TCM to trans pinout/diagram. the truck is a 2006 Silverado 3500 cab and chassis Duramax with the Allison 6 speed. the harness got torn up and there's a couple of wires in there that are the same colors. thank you

Feb 18, 2026 at 2:04 PM

AL514

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Hello, I do see there are a couple wires the same color on the wiring diagrams, give me a few minutes to get these ready for you.

Feb 18, 2026 at 7:44 PM

AL514

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Here are the wiring diagrams for the Allison transmission, the aftermarket and oem wiring. With an inline connector and pinout. Hopefully this is the correct info you were looking for.

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