This ACDelco 9G Glow Plug with a 12mm hex is the perfect OEM replacement for 2006 - 2016 6.6L Duramax engines from GM. As a top - notch supplier of GM original equipment parts, ACDelco always meets or beats OE standards. It fits GM vehicles from 2006 to 2016 with LBZ, LMM, LML 6.6L Duramax engines. GM Part Number: 12639701, ACDelco Part Number: 9G.

Using this ACDelco 9G glow plug is simple. Just replace your old glow plug with this new one in your 2006 - 2016 6.6L Duramax engine. When installing, make sure the engine is off and cooled down to avoid burns. For maintenance, it's a good idea to check the glow plug regularly, especially if you notice any starting problems. Keep it clean and dry to extend its lifespan. If you have any issues, consult your vehicle's manual or a professional mechanic.