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May 3, 2019 Service bulletin

This technical bulletin provides a procedure to information on OnStar will update vehicles remotely...

GMC technical service bulletin 18NA195 for 2018 GMC Terrain, 2018 Cadillac CTS and 2018 Cadillac Ats and others.

Bulletin number
18NA195
Component
Equipment: electrical: radio/tape deck/cd etc.
Summary
This technical bulletin provides a procedure to information on OnStar will update vehicles remotely through in-vehicle prompts from the radio display. However, some customers may decline the vehicle update or the update is attempted, but is not successful. In such cases, and in all export markets plus fleet customers, dealers will need to reprogram the vehicle with the new software package.

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