SDPI
Duramax

2004.5-2005 LLY DT550 Built Allison Transmission

$5,494.50

1

Details

- All new upgraded clutches compared to stock - Additional clutches for added holding strength - All New Electronics - An upgraded valve body - Upgraded C3 and C4 return springs - LML dual disk torque converter for superior reliability - An upgraded transmission case - A 3-year standard or 5-year extended warranty - All of the above plus the DuramaxTuner 6 Speed Conversion - Custom TCM tuning for your specific truck - Double Overdrive = 14% RPM Reduction - Less Road Noise and Vibration - Better fuel economy - Gear indicator works on Edge CTS monitor - Works with high idle, retrofit tap shifters - You save $300 when bundled with a transmission - Model Year - - 5 Speed or 6 Speed - - Fleece Transmission Cooler - - 2004.5-2005 LLY Trans Core - - 4 Wheel Drive or 2 Wheel Drive - - C3 Oiler Upgrade - - Goerend Deep Aluminum Pan - - 5 Year Extended Warranty - - Shipping - - Lift Gate Service - - Install Warranty Acknowledgement -

Fitment

  • 2004–2005GMLLY

Not sure it fits? Ask us before you order.

Shipping

Ships via FedEx or UPS. Shipping is calculated at checkout based on your order. See the shipping policy.

All SDPI products are sold for lawful use. Performance calibrations are built for the emissions configuration you report and applicable local regulations — see our terms for details.