external connector wiring?

2012 CHEVROLET SILVERADO
210,000 MILES • 6.0L • V8 • 4WD • AUTOMATIC
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LUJANE
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  • 1 POST
my transmission is a 6l90 code 2D2A i recently had it rebuilt the external plug that goes into the transmission from wiring harness is a 16 pin but only has 9 wires going to it from the harness the plug that is cut off is gone the wires from the harness are 2 tan 2 tan/ black 1 pink 1 blue 1 red/white 1 orange/black 1 black/white i need to know where each wire goes on the 16 pin connector
Mar 31, 2026 at 7:10 PM
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STRAILER
  • ✓Experienced Mechanic
  • 55,588 POSTS
Hello,

Here is the 16 pin electrical connector wiring diagram so you can see how the system works. This guide can help you test the wiring.

https://www.2carpros.com/articles/how-to-check-wiring

Check out the images (below). Let us know how it goes
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Apr 2, 2026 at 4:20 AM
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