PIT5124B

Bulletin No.: PIT5124B
Date: Jan-2017
Subject:
UUI Radio Mutes And Displays Phone At Startup
Models:
2011 Chevrolet Avalanche, Silverado, Tahoe, Suburban
2011 GMC Sierra, Yukon
With OnStar (RPO UE1) and Radio (RPO UUI)
This PI was superseded to update the administrative details. Please discard PIT5124A.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern
Customer may report that within 10 seconds after startup the radio will mute and phone icon displays on the radio for up to 15 seconds and then returns back to
normal operation.
Note: This PI only applies to vehicles equipped with OnStar RPO (UE1) and radio RPO (UUI) - AM/FM STEREO WITH CD PLAYER W/ USB PORT.
Recommendation/Instructions
Press the OnStar button. When the connection is made to an OnStar Advisor, request a unit configuration.
If the concern is still present after the unit configuration, call GM TAC for further assistance.
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.
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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