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    LLY Duramax Cooling System


    LLY Duramax Radiators
    LLY Duramax Radiators
    Coolant and Additives
    Coolant and Additives
    LLY Duramax Hoses - Pipes - Connectors
    LLY Duramax Hoses - Pipes - Connectors
    Keep your 2004.5–2005 LLY Duramax running cool and reliable with premium cooling system components. From heavy-duty radiators and water pumps to upgraded thermostats and coolant hoses, every part is engineered for superior durability and heat management. Designed to handle the demands of towing, performance upgrades, and extreme climates, our high-quality LLY Duramax cooling system parts ensure consistent temperature control and long-term engine protection.

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    Duramax 01-16 Coolant Filtration System DieselSite CFIKDM
    Duramax 01-16 Coolant Filtration System DieselSite CFIKDM $170.00
    Fits: LB7 | LLY | LBZ | LMM | LML Duramax 2001-2016
    Duramax 01-16 High Temperature Thermostats Mishimoto MMTS-CHV-01DH
    Duramax 01-16 High Temperature Thermostats Mishimoto MMTS-CHV-01DH $99.95
    Fits: Duramax 2001-2016
    Duramax 01-16 Low Temperature Thermostats Mishimoto MMTS-CHV-01DL
    Duramax 01-16 Low Temperature Thermostats Mishimoto MMTS-CHV-01DL $101.95
    Fits: Duramax 2001-2016
    Duramax OE Rear Thermostat GM 97241130
    Duramax OE Rear Thermostat GM 97241130 $53.80
    Fits: Duramax 2001-2018
    Duramax Front Thermostat GM 97241129
    Duramax Front Thermostat GM 97241129 $61.56
    Fits: Duramax 2001-2018
    LB7|LLY Duramax Replacement Water Pump Alliant AP63562
    LB7|LLY Duramax Replacement Water Pump Alliant AP63562 $142.12
    Fits: LB7|LLY Duramax 2001-2005
    Alliant AP63566 Water Pump Housing
    Alliant AP63566 Water Pump Housing $77.61
    Fits: LB7|LLY Duramax 2001-2005
    Duramax 2001-2007 Coolant Overflow Tank PPE 116454025
    Duramax 2001-2007 Coolant Overflow Tank PPE 116454025 $269.99
    Fits: Duramax 2001-2007
    Duramax OE Engine Oil Cooler GM 19210615
    Sold Out
    Duramax OE Engine Oil Cooler GM 19210615 $770.65
    Fits: Duramax 2001-2010 & Duramax Express/Savana Van 2006-2010
    Mishimoto MMRT-DMAX-01N Aluminum Degas Tank
    Mishimoto MMRT-DMAX-01N Aluminum Degas Tank $471.95
    Fits: LB7|LLY|LBZ Duramax 2001-2007
    Mishimoto MMRT-DMAX-01MWBK Wrinkle Black Aluminum Degas Tank
    Mishimoto MMRT-DMAX-01MWBK Wrinkle Black Aluminum Degas Tank $471.95
    Fits: LB7|LLY|LBZ Duramax 2001-2007
    Duramax Billet Coolant Block Off Plate XDP XD344
    Duramax Billet Coolant Block Off Plate XDP XD344 $64.95
    Fits: Duramax 2001-2017
    Duramax Coolant Block-Off Plate Fleece FPE-DMAX-CBOP
    Duramax Coolant Block-Off Plate Fleece FPE-DMAX-CBOP $55.00
    Fits: Duramax 2001-2017
    Black Coolant Block-Off Plate PPE 119000820
    Black Coolant Block-Off Plate PPE 119000820 $53.99
    Fits: Duramax 2001-2024
    Duramax 2001-2010 Water Pump Gasket Kit Mahle GS33752
    Duramax 2001-2010 Water Pump Gasket Kit Mahle GS33752 $24.83
    Fits: Duramax 2001-2010
    Duramax 01-16 Water Pump Seal Mahle K31904
    Duramax 01-16 Water Pump Seal Mahle K31904 $2.03
    Fits: Duramax 2001-2016
    LB7|LLY Duramax Water Pump Gasket Kit Mahle C32062
    LB7|LLY Duramax Water Pump Gasket Kit Mahle C32062 $6.55
    Fits: LB7|LLY Duramax 2001-2005
    PPE 119100100 Fan Clutch Delete Nut
    PPE 119100100 Fan Clutch Delete Nut $35.99
    Fits: Duramax 2001-2022
    Cold Case RC100 Polished Billet Radiator Cap Cover
    Cold Case RC100 Polished Billet Radiator Cap Cover $23.22
    Fits: Press Fit Cover For Cold Case Radiator Caps