Glow Plug Controller – GM (12721593)

This is a glow plug controller from GM, factory part number 12721593. It is catalogued under Electrical Components > Control Units.

• Main battery, 3.0L diesel, glow plug and 3.0l diesel
• Silverado, Sierra 2500 head Silverado, Sierra 3500 head
• Where a component shares an earth with others, a corroded earth strap produces faults that move around as loads switch on and off.

Keeping the old part until the new one is fitted and checked is the simplest way to avoid a second order.

Match this against the part you are taking off rather than against a photo. If the number is unreadable, send us the VIN and we will confirm it. Dispatched from our US warehouse within one to two business days, with free shipping over $59.