Clutch and Transmission

Subject:   Reprogramming Procedures for the 8L90 8-Speed Transmission Model and Year:    2015 Corvette, Silverado, Sierra, Yukon, Yukon XL, and Escalade Source:  GM TechLink Page Number:   NA Date: ... Read More

Subject:   All New 8L90 8-Speed Automatic Transmission Model and Year:    2015 Corvette, Silverado, Sierra, Yukon, Yukon XL, and Escalade Source:  GM TechLink Page Number:   NA Date:  April 10,... Read More

New 8-Speed Enables Quicker, More Efficient Corvette GM-designed, patented paddle-shift gearbox rivals dual-clutch performance 2014-08-20 DETROIT – The all-new, GM-developed Hydra-Matic 8L90 paddle-shift eight-speed automatic transmission... Read More

#PIP5784: 8L45 8L90 Automatic Transmissions With No Movement After Valve Body Replacement - (Mar 1, 2021) Brand: Model: Model Year: VIN: Engine: Transmission: from to from to Cadillac ATS Models 2016 2019 All All All ... Read More

#18-NA-285: Information on Slight Movement in Park at Ignition On and Vehicle Start Up and/or During a Remote Vehicle Start Event - (Jan 22, 2021) Subject:  Information on Slight Movement in Park at Ignition On and Vehicle Start Up and/or... Read More

#16-NA-361: Information on Transmission Harsh 1-2 Shift Upon First Start Up/Shift of the Day Under Light Throttle - (Apr 6, 2017) Subject:  Information on Transmission Harsh 1-2 Shift Upon First Start Up/Shift of the Day Under Light Throttle ... Read More

November 29, 2023 The 8-speed automatic transmissions (RPO M5N, MNU, M5U, M5X, MHA, M5T, MQE, MQD) in some 2015-2018 Corvette; 2015-2020 Escalade, Yukon; 2015-2023 Silverado 1500, Sierra 1500; 2016-2018 CTS; 2016-2019 ATS, CTS; 2016-2023 Camaro; 2017... Read More

Hard shifting conditions when shifting into 1st gear or Reverse may be found on some 2014 - 2018 Silverado, Sierra and Corvette models equipped the 4.3L V6 engine, 5.3L V8 engine or 6.2L V8 engine (RPOs LV3, L83, L86, LT4) and 2015-2018 CTS-V,... Read More

#PIP5437B: 8L45 8L90 Diagnostic Tips for Harsh Shifts and Delayed or Harsh Garage Shift Engagements - (May 22, 2017) Subject:  8L45 8L90 Diagnostic Tips for Harsh Shifts and Delayed or Harsh Garage Shift Engagements Brand: Model: ... Read More

#16-NA-364: Delayed Engagement After Sitting With Engine Off - Clutch Slow to Fill - (Jun 29, 2017) Subject:  Delayed Engagement After Sitting With Engine Off - Clutch Slow to Fill   Brand: Model: Model Year: VIN: Engine: ... Read More