Description
This OEM replacement water pump restores proper cooling system performance. Built to GM factory specifications for a direct fit, the 40009321 pump ensures durability, leak-free operation, and long service life.
Important Note:
– This GM water pump does not include the gasket, O-ring, or bolts. These items must be purchased separately for proper installation.
– Smaller bolts from your original pump can be reused.
– The longer bolts are one-time use only and must be replaced when installing the new pump.
Features & Benefits:
– Genuine GM OE replacement – exact fit and function
– Restores cooling performance and prevents overheating
– Manufactured to GM’s strict durability and performance standards
UPC: 195491634008
Vehicle Fitment:
2023–2025 Chevrolet Silverado 1500 (3.0L LZ0 Duramax)
2023–2025 GMC Sierra 1500 (3.0L LZ0 Duramax)
If the 8th digit of your VIN is “8”, your vehicle is equipped with the LZ0 Duramax and this water pump will fit.
If the 8th digit of your VIN is “T”, your truck has the LM2 Duramax. Please see GM part 40009584 instead.
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