SunCoast 2500 Stall 1055-2 Converter, 2001-2016 LB7/LLY/LBZ/LMM/LML

Part# GM-1055-2-3D

$1,755.00 +$350.00 core charge (refundable)

WARNING: Cancer and Reproductive Harm - www.P65Warnings.Ca.Gov

Fits: 2001 thru 2016 Chevy Silverado/GMC Sierra 2500HD/3500HD LB7/LLY/LBZ/LMM/LML Duramax Diesel

This is a dual-purpose converter for the best of both worlds. With a very hard lean on the performance side, this SunCoast torque converter can be used in towing light to moderate loads. Anything heavier than 10,000lbs. you would definitely want to use something tighter. This converter really shines with a larger turbo or a small compound setup, however it can be used in stock turbo setups to create neck-snapping launches.


  • Higher than factory stall speed, approx. 2500RPM
  • Billet triple disc with billet stator
  • Performance oriented while suitable for light towing applications
  • Works best with larger single turbos & small compound setups


  • Heavy towing is not recommended with this converter
  • Billet transmission internals recommended for 500+HP