Allison 1000 replacement internal wiring harness. Fits 2004.5, 2005 LLY models with 5 speed Allison with G solenoid. This is the harness that is connected to the solenoids on the transmission valve body.

It is accessible and replaceable by removing the fluid pan on the Allison 1000. If you are looking for just the pass through connector seal due to a leak the 10685 is available separately or if you need the pass through and connector body the 10686 is another alternative.

FAQ:

Will the 04-05 internal harness fit my 01-03?

Yes, the only difference between the two is the long extra plug (G solenoid), the 01-03 was never tuned for it so the tcm won't even pick up that wire is even there. All you do is tie it up out of the way to be good to go.

Details:

• Engine Manufacturer: Duramax
• Liter: 6.6 Liter
• Engine Designation: LLY
• Engine Years: 2004-2005
• Transmission Code: Allison 1000

Applications:

• 2004-2005 Silverado/Sierra 2500HD/3500HD LLY