2-3 Upshift Slip or Flare – 2006-2023 Cadillac Chevrolet GMC Hummer

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Copyright 2022 General Motors LLC. All Rights Reserved. Service Bulletin Bulletin No.: 22-NA-185 Date: October, 2022 INFORMATION Subject: Information on 2-3 Upshift Slip or Flare This bulletin replaces PIP5429A. Please discard PIP5429A. Brand: Model: Model Year: VIN: Engine: Transmission: from to from to Cadillac ATS 2013 2015 MYA CTS 2008 2015 MYA MYB MYD Escalade Models 2007 2016 MYC SRX 2007 2009 MYB STS Models 2006- 2011 MYB MYC XLR Models 2006 2009 MYC Chevrolet Avalanche 2007 2013 MYC Caprice PPV 2011 2017 MYA MYC Colorado 2015 2022 6L50 Camaro 2010 2015 MYB MYC MYD Corvette 2006 2014 MYC Express 2010 2023 MYD Silverado 2014 2018 MYC MYD Silverado 1500 (New Model) 2019 2019 MYC MYD Silverado LD MYC MYD Silverado 1500 2020 2021 Silverado 1500 – LTD MYC (RPO J21, VIN Digit 5 = W/Y) 2022 2022 Silverado 2500HD/3500HD 2019 2023 MYD SS 2014 2017 MYC Suburban 2007 2020 MYC Tahoe 2007 2020 MYC Page 2 October, 2022 Bulletin No.: 22-NA-185 Brand: Model: Model Year: VIN: Engine: Transmission: from to from to GMC Canyon 2015 2022 MYB Savana 2010 2023 MYD Sierra 2014 2018 MYC MYD Sierra 1500 (New Model) 2019 2019 MYC MYD Sierra Limited MYC MYD Sierra 1500 2020 2021 Sierra 1500 Limited MYC (RPO J21, VIN Digit 5 = 8/9) 2022 2022 Sierra 2500HD/3500HD 2019 2023 MYD Yukon Models 2007 2020 MYC Hummer H2 Models 2008 2011 MYC Involved Region or Country North America, MEO Middle East Condition Some customers may comment on a 2-3 upshift slip or flare. Cause This condition is a NORMAL characteristic of the transmission, it will not cause durability concerns and no repair attempts should be made. Information At this time this flare condition has been recognized in two different driving conditions: 1. During the first 2-3 upshift after the vehicle has been sitting, engine off for several hours. This condition may be caused by air that is trapped in the 3-5-R clutch assembly. When the first 2-3 upshift is made this trapped air is purged and the following 2-3 shifts will be normal with no flare. When diagnosing this condition, a garage shift into reverse before drive will purge this air and prevent the 2-3 flare from occurring This condition is a NORMAL characteristic of the transmission, it will not cause durability concerns and no repair attempts should be made. Please communicate to the customer this will not impact the designed performance or reliability of the vehicle. Please share this information with the customer, including a copy of this message. 2. When transmission ATF temperature is at or below 85 degrees F (30 degrees C). This 2-3 upshift flare can occur until the ATF temperature warms. If the 2-3 flare is determined to be ATF temperature sensitive use a Tech 2 or GDS2 to make note of the throttle position when the flare occurs Drive the vehicle to get ATF temperature to at least 104 degrees F (40 degrees C) and then make several 2-3 shifts at the throttle position determined to be the most sensitive to the 2-3 flare. This will allow the transmission adapts to tailor the shifts and may help to eliminate the cold 2-3 flare. This condition is a NORMAL characteristic of the transmission, it will not cause durability concerns and no repair attempts should be made. Please share this information with the customer, including a copy of this message. Bulletin No.: 22-NA-185 October, 2022 Page 3 Important: Service agents must comply with all International, Federal, State, Provincial, and/or Local laws applicable to the activities it performs under this bulletin, including but not limited to handling, deploying, preparing, classifying, packaging, marking, labeling, and shipping dangerous goods. In the event of a conflict between the procedures set forth in this bulletin and the laws that apply to your dealership, you must follow those applicable laws. Version 1 Modified Released September 26, 2022 GM bulletins are intended for use by professional technicians, NOT a “do-it-yourselfer”. They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information. WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION

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