Programmed 2003-2006 Yukon XL 2500 PCM | 12589463 | Plug & Play
My original part number isn’t 12589463. Will this still work?. “Before you replace your PCM, do yourself a favor and check two things: your battery and your ground connections. A weak battery or a corroded ground strap (especially the main one from the engine block to the chassis) can cause bizarre electrical issues that mimic a failed computer.