This bulletin applies to 2014-2019 GMC Sierra and 2015-2019 Yukon vehicles. A vehicle may have a concern with an SES lamp on and a rich condition DTC P0172 and P0175.
This bulletin applies to 2002-2018 Chevy Escalade, Avalanche, Express, Silverado, Tahoe and Suburban models, Cadillac Escalade, Hummer H and GMC Savana, Sierra and Yukon models.
Some owners of 2007-2019 Chevy Avalanche, Silverado, Suburban or Tahoe vehicles, GMC Sierra and Yukon vehicles and Cadillac Escalades may comment on unwanted Stability Activation and/or a Service Stability message.
This bulletin applies to 2015 GMC Yukon and Sierra vehicles. Customers may comment about firm 1-2 upshifts, firm 3-1 downshifts, engine rpm flare on tip-in and the MIL on. The technician may find DTCs P0606, P16F3 or P2818 set as current or history.
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.
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.
This bulletin applies to 2015-2019 GMC Sierra 2500/3500 and Yukon models. Some customers may comment that the RKE (remote keyless entry) only works at short distances from the vehicle. The cause may be the GM accessory Echomaster Trailering Camera system.
Several GM vehicle models may feature two distinctively different-looking per-cylinder valve-cover-mounted ignition coils. This is due to a supplier difference and, according to GM, does not affect performance or serviceability.
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).
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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