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TOPIC : GMC

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Trans Trauma

Certain 2017 GMC Sierra, Yukon and Yukon XL vehicles equipped with an 8-speed automatic transmission may have a condition where a false failure action is being taken when it is not required. This condition can result in the transmission holding the last known safe gear for 6 seconds.

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GMC Mystery Noise

This bulletin applies to 2017 – 2018 GMC Sierra, 2019 Sierra Limited and 2017-2019 Yukon vehicles. Some customers may comment on a noise described as a tick, spark, knock, detonation or exhaust. The cause may be that the steering shaft seal (intermediate shaft seal) was incorrectly installed.

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Wheel Speed Sensor Woes

This bulletin applies to 2007-2017 GMC Acadia vehicles. In some cases, the ABS Service Traction Control System, and/or Service StabiliTrak telltale lights may be on. During initial scan for EBCM module diagnostic codes, you may find one or more of the following DTCs: C0035-C0050 with specific symptom bytes 18, 5A or 0F.

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Too Much E85?

This bulletin applies to a number of GM products including 2013-2015 Cadillac ATS/2012-2015 SRX, 2012-2017 Buick LaCrosse/Regal/Verano, 2012-2017 Chevy Caprice, 2016-2018 Captiva/ 2011-2017 Equinox/2012-2018 Impala and 2011-2017 GMC Terrain.

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Dirty Diesel Deeds

Chevy and GMC vehicles equipped with LGH, LML, LUZ, LWN, L5P and LH7 diesel engines may exhibit excessive smoke at the tailpipe, with DTC P2002 set. This may be the result of a cracked or broken diesel particulate filter (DPF).

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No Whine Worries

This bulletin applies to 2015-2019 GMC Canyon trucks equipped with a MYD automatic transmission. The customer may comment that they hear a high-pitched tone or whine noise with the key on and engine off, or for up to one minute after the engine is shut off.

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GMC Blower Muffler

Owners of 2005-2012 GMC Canyon vehicles may comment on excessive or annoying blower motor noise on the low fan speed. Sounds may include ticking, chirping, clicking or whirring.

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GMC PS Leak

This bulletin applies to 2007-2013 GMC Yukon and Denali vehicles. A power steering fluid leak may be found from the power steering hose connection at the steering rack.

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Equinox Switch Glitch

A “small number” of ignition and start switch housings are involved in a recall involving 2010-2013 Chevy Equinox, 2013 Buick Encore, 2011 Buick Regal, 2013-2014 Buick Verano, 2011-2016 Chevy Cruze, 2013-2015 Chevy Malibu and 2011-2013 GMC Terrain models. The ignition system may contain a damaged electronic park lock lever that could fail to prevent the ignition key to be removed when the transmission is in a position other than park. 

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There’s the Rub

Owners of 2007-2013 GMC Denali, Sierra or Yukon vehicles may comment that one or more of the doors do not lock/unlock when activating the power door locks. The condition may be intermittent or constant. The cause may be that the door locking button is hanging up on the window belt inner sealing strip within the door. The inboard seal material may rub on the button.

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