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Service bulletin GCUS-3-424

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10080082
Published by NHTSA2016-09-14
Manufacturer's numberGCUS-3-424
Manufacturer's date2016-01-29
NHTSA componentEQUIPMENT

NHTSA's summary

15663A - SERVICE UPDATE (REVISED SPECIAL REPAIR TOOL ADDED). RELOCATE A WIRE CIRCUIT WITHIN THE ONSTAR CONNECTOR. THESE VEHICLES LACK A GROUND IN THE MICROPHONE RETURN PATH, WHICH RESULTS IN THE VOICE RECOGNITION BECOMING INOPERABLE WHEN THE VEHICLE IS IN RETAINED ACCESSORY (RAP) OR ACCESSORY POWER MODE. IN ADDITION, THE HANDS-FREE VOICE QUALITY CAN BE DEGRADED. THE ONSTAR FUNCTIONS ARE NOT IMPACTED BY THIS CONDITION.

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Equipment and accessories

Vehicles listed
BUICK ENCLAVE2016
CHEVROLET TRAVERSE2016
GMC ACADIA2016

Listing a model year does not mean every vehicle of it is concerned: the document says which.

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