PIP4021D
Service Bulletin Details
Public Details for: PIP4021D
This preliminary information communication provides information to the technician that a whine noise heard from the automatic transmission fluid pan hear with thethe key on and engine off, or for up to one minute after the vehicle has been
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Bulletin No.: PIP4021D Published date: 02/21/2019 Preliminary Information PIP4021D High Pitch Whine or Buzz Noise Heard From Under The Vehicle Models Brand: Model: Model Years: VIN: from to Engine: Transmissions: Cadillac ATS 2013 - 2015 All All All MYA Cadillac CTS 2008 - 2015 All All All MYA, MYB, MYD Cadillac Escalade Models 2007 - 2017 All All All MYC Cadillac SRX 2007 - 2009 All All All MYB Cadillac STS 2006 - 2011 All All All MYB, MYC Cadillac XLR Models 2006 - 2009 All All All MYC Chevrolet Avalanche 2009 - 2013 All All All MYC Chevrolet Camaro 2010 - 2015 All All All MYB, MYC, MYD Chevrolet Colorado 2015 - 2019 All All All MYB Chevrolet Corvette 2006 - 2014 All All All MYC Chevrolet Express 2010 - 2019 All All All MYD Chevrolet Silverado 2007 - 2019 All All All MYC, MYD Chevrolet Suburban 2009 - 2019 All All All MYC, MYD Chevrolet Tahoe 2009 - 2019 All All All MYC, MYD GMC Canyon 2015 - 2019 All All All MYB GMC Savana 2010 - 2019 All All All MYD GMC Sierra 2009 - 2019 All All All MYC, MYD GMC Yukon Models 2007 - 2019 All All All MYC Hummer H2 2008 - 2009 All All All MYC Pontiac G8 2008 - 2009 All All All MYC Supersession Statement This PI Was Superseded To Update Models And Model Years. Please Discard PIP4021C. The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI. Condition / Concern Customers may comment that they hear a high pitched tone or whine type noise from the vehicle with the key on and engine off, or for up to one minute after the vehicle has been shut off. The noise should be heard from outside the vehicle only or with a window open. It will be most noticeable in an enclosed area (i.e. garage, car wash...etc). Recommendations / Instructions The whine/tone may be caused by the internal transmission solenoids being commanded to minimum line pressure by the TCM. This noise should be considered an operating characteristic and no repairs should be attempted. Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed. © 2019 General Motors. All Rights Reserved.