Genuine OEM GM 40009452 Engine Coolant Flow Control Valve 3.0L Duramax Diesel
**LZ0 COOLANT CONTROL VALVE IN STOCK READY TO SHIP**
$359.00
Free shipping included
🔒 You'll be taken to eBay to complete your purchase securely.
Shipping, delivery & returns
Free shipping · UPS (Standard Shipping)
📦 Est. delivery Jul 2, 2026 – Jul 7, 2026
Ships from Central, South Carolina, US
🌍 Ships to 169 countries
↩️ Returns accepted · 30 calendar day · seller pays return shipping
Seller
About this item
The system also includes a de-gas circuit to remove trapped air, ensuring optimal operation.
Specifications
| Mounting Style | Bolt-On |
| Items Included | GM 40009452 Engine Coolant Flow Control Valve 3.0L Duramax Diesel |
| Manufacturer Part Number | 40009452 |
| Material | Metal, Plastic |
| Superseded Part Number | 40009158 |
| Vintage Part | No |
| Brand | GM |
| Type | Heater Control Valve |
Show 8 more specs ▾
| Interchange Part Number | 40009158 |
| Manufacturer Warranty | 1 Year |
| OE/OEM Part Number | Genuine OEM GM 40009452 Engine Coolant Flow Control Valve LZ0 |
| Features | 100% Leak tested, Durability Tested, No Drilling or Modifications Needed for Installation |
| Universal Fitment | No |
| Country of Origin | Czechia |
| Performance Part | No |
| UPC | 197224699582 |
Item description from seller
Genuine OEM GM 40009452 Engine Coolant Flow Control Valve 3.0L Duramax Diesel…Read more ▾
Genuine OEM GM 40009452 Engine Coolant Flow Control Valve 3.0L Duramax Diesel
The 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.
Replaces: 40009158
Fitment: 2023-2025 Chevy/GMC LZ0 3.0L Duramax Models
SHIPPING IS FREE via UPS Ground to the lower 48 US states .
Alaska, Hawaii, Puerto Rico, Guam, APO/FPO addresses will need to email for a shipping quote.
CANADA, MEXICO, & ALL INTERNATIONAL BUYERS WILL NEED TO USE THE eBay GSP (GLOBAL SHIPPING PROGRAM)
Thanks for looking, be sure to check out our other items!
Secure checkout
via eBay
Free returns
30 calendar day
Free shipping
UPS
Similar parts you may like
GM 40009452 Coolant Flow Control Valve 3.0L LZ0 Duramax Diesel Silverado Sierra
$359.00Free ship
FOR GM 40009452 Coolant Flow Control Valve For LZO 3.0L Diesel Engines 1500
$479.99Free ship
40009452 Genuine GM Engine Coolant Flow Control Valve New/OEM OLD Part# 40009158
$295.00
LZ0 3.0L Duramax Diesel Engine Coolant Flow Control Valve Genuine GM 40009452
$359.00Free ship