Dealing with transmission issues on your Duramax truck? This internal wiring harness replacement might be your solution! Specifically designed for Allison 1000/2000/2400 6-speed transmissions in 2006-2009 Chevy Silverado 2500/3500 and GMC Sierra 2500/3500 models with Duramax engines.
This is the 7-solenoid type that replaces multiple part numbers including OEM 29543336, Rostra 350-0087, and Transtar 121446C. The high-quality copper core ensures efficient current conduction while the heat-resistant insulation stands up to transmission heat and vibration.
Installation requires some mechanical knowledge - you'll need to remove the old harness near the transmission and carefully install this one in its place. The improved signal transmission means smoother shifting and better transmission performance. If you're experiencing shifting problems or transmission error codes, this harness could get your truck back to running like new!
Free 30-day returns 
Free 30-day returns
