Block Heater Element, L5P Duramax | 2017-2019

This genuine GM engine block heater element (GM 12724955) fits the 6.6L L5P Duramax in 2017-2019 Chevy Silverado and GMC Sierra 2500HD and 3500HD trucks. The block heater warms the engine coolant when the truck is plugged in, which helps the diesel start and warm up in cold weather.

Note: This is the heater element only. The block heater cord is not included.

Features

• Genuine GM part, GM 12724955
• Direct replacement for the factory block heater element on 2017-2019 L5P trucks

What's Included

• (1) Engine Block Heater Element, genuine GM 12724955

Before You Order

• This element fits 2017-2019 L5P trucks only. 2020 and newer L5P trucks use a different block heater, and 2001-2016 Duramax trucks use the Block Heater Element, Duramax | 2001 - 2016.
• If the engine doesn't warm up when plugged in, check the cord and outlet first. A damaged cord can look like a failed element.

Installation Tips

• In most cases, some coolant has to be drained before the element is removed, so plan to top off or refill the cooling system afterward.
• Don't plug in the block heater until the element is installed and the cooling system is full. Running it dry can damage it.

Frequently Asked Questions

Does this fit my 2020 or newer L5P?
No. 2020 and newer trucks use a different block heater element. This part fits 2017-2019 L5P trucks.

Does this fit my 2001-2016 Duramax?
No. Those trucks use the Block Heater Element, Duramax | 2001 - 2016.

Is the cord included?
No. This is the heater element only.

How do I know if my block heater element is bad?
If the engine stays cold after being plugged in for several hours and the cord and outlet are working, the element is the likely cause. Check before ordering.

Do I need to drain coolant to replace it?
In most cases, yes. Some coolant has to be drained before the element comes out.

For warranty information, see our Warranty Policy.