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TOPIC : GMC Yukon

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Modifications Can Cause Codes

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.

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Check for Leaky Injectors

This bulletin applies to 2015-2018 GMC Yukon vehicles equipped with a 5.3L or 6.2L engine, and 2019 Savana vehicles equipped with a 4.3L engine. Some customers may comment about an underhood fuel odor and/or starting the engine sometimes requires extended cranking time.

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Trans Relearn

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.

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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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GMC Remote Key Range Concern

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.

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Mixed Up Coils?

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.

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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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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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Code Plays a Joke

This bulletin applies to 2007-2013 GMC Yukon and Sierra vehicles. DTC B2555 may be found in a driver and/or passenger door module (DDM or PDM). This DTC is associated with front driver and passenger door panel courtesy lights that are only available on certain models.

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