B07WMWL1QW Carxtc Car Radio Electronic Wire Harness and Antenna Adapter for Installing an Aftermarket Stereo, Fits Chevrolet Silverado 1500-3500 2003-2006 – Retains Onstar and Intergrates with Factory Amp

Needed if Onstar is installed (even if not paid for) – Works with Non-Bose, Standard Bose & Premium Bose / Y91 amplified systems.
Retains Factory Amplifier – Retains Chimes includes: seat belt, check engine, key in ignition, low fuel, low oil and lights on

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