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The Axxess GM Data Interface (2006–2012) allows seamless integration of an aftermarket radio while retaining essential vehicle features. It provides 12V accessory power (10A), retains R.A.P. (Retained Accessory Power), and supports NAV outputs for parking brake, reverse, and speed sense. Compatible with both non-amplified and amplified models, it also retains audio controls on the steering wheel, making installation simple and preserving factory functionality.