3:rd-Mar-2017, 18:57:21
It could be the aerial the radio unit the transmitters so many factors at play, it may pay to contact a car audio company.
Astra-J 2.0 CDTI S/S
Retrofitted AFL, TPMS, Navi950, BT, DAB, Rear Camera, Infinity sound system, Towbar, Flexfloor & more.
I can do programming and retrofits using genuine GM MDI and Dealer software.