GM Engine Coolant Flow Control Valve, 2020-2022 LM2

Part# ‍40009644

$507.65

WARNING: Cancer and Reproductive Harm - www.P65Warnings.Ca.Gov

Fits: 2020 thru 2022 Chevy Silverado/GMC Sierra 1500 LM2 Duramax Diesel

Please call for availability

*Limit 1 per customer due to availability*

The LM2/LZ0 Duramax diesel engines feature an advanced Active Thermal Management (ATM) cooling system designed to optimize fuel economy, performance, and emissions. This Engine Coolant Flow Control Valve plays a critical role by precisely controlling the coolant flow from the water pump, ensuring peak efficiency in all operating conditions. It combines a rotary control valve and a block control valve to independently manage coolant flow during warm-up (split cooling), eliminating the need for a traditional thermostat.

The valve directs coolant to critical components such as the turbocharger, EGR system, oil coolers, and heater core to efficiently regulate temperatures. The system also includes a de-gas circuit to remove trapped air, ensuring optimal operation.

Features:

  • Advanced thermal management control
  • Genuine GM part
  • Two control valves for precise operation
  • Ensures the engine reaches optimal temperatures quickly while maintaining durability, performance, and low emissions

Includes:

  • GM Engine Coolant Flow Control Valve

DmaxStore Note:

  • We have seen customers reporting failure of this part at approximately 100,000 miles. 

Warranty:

  • This product carries a 1-year warranty

Replaces Part#:

  • GM 24001355
  • GM 40009179
  • GM 40009644

Customer Reviews

Based on 10 reviews
90%
(9)
10%
(1)
0%
(0)
0%
(0)
0%
(0)
M
Myron
The valve worked great and it was in stock

The valve worked great and it was in stock instead of waiting for who knows how long at GM dealer!

A
Alex
Great

Great service

C
Chris
hardto believe dealer cant get parts

hardto believe dealer cant get parts . had them on my doorstep in 4 days. thanks you my truck is not in limp mode anymore.

R
Roman
Couldn't find this part anywhere ! But you guys

Couldn't find this part anywhere ! But you guys had it ! I installed and it worked beautifully! Couldn't be more happy! When called staff were very helpful and worked to get the part shipped quick! Will definitely be ordering from this site again!

F
Fredy De
Im

Im sohappy