GM "OnStar" System Interface Harness
- This harness will allows user to temporarily connect factory radio without removing aftermarket radio
- With the factory radio connected vehicle personalization features can be changed using the controls on the factory radio
- 24-Pin T-harness
- Interface harness to be used with Metra 70-2003T Class 2 Data Retention harness and SP-2003 Door chime speaker to hear audio from OnStar
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