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AMP Research Powerstep wire harness with connector for 2001–2006 GMC Sierra 1500 HD supports the Powerstep automatic electric running board system. The harness is sized and finished in black to integrate with Powerstep assemblies, providing the wiring connection that lets motorized steps extend with the door and retract for clearance. It's a purpose-built component intended for straightforward installation with compatible Powerstep hardware.
AMP Research 01-06 GMC Sierra 1500 HD PowerStep Wiring Harness w/ Connector
