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GM TECHS On star diagnostic tool?
We ran into a Sierra this week with the codes B2470-02 - Cellular phone antenna short to ground and code B2470-04 Cellular phone antenna open. Gen9 Onstar system with a red light on the Onstar. We have inspected the Coax cables and we have determined it is eit... Login to read more. 
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| Engine | 5.3 L |
| Trans | 6-speed Automatic (Electronic) |
Vehicle Data
2014 GMC Sierra 1500 SLE 5.3L
| Engine | 5.3 L |
| Trans | 6-speed Automatic (Electronic) |
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