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    L5P Duramax Cooling System


    L5P Duramax cooling system components are engineered to maintain optimal engine temperatures, prevent overheating, and ensure peak performance on 2017+ Chevy and GMC 6.6L diesel trucks. Ideal for towing, hauling, and high-performance applications, these heavy-duty parts improve reliability, extend engine life, and keep your Duramax running efficiently under any load—essential for diesel owners seeking durability and peace of mind.

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    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
    LML|L5P Duramax AC Condenser CSF 10724
    LML|L5P Duramax AC Condenser CSF 10724 $114.83
    Fits: LML|L5P Duramax 2015-2018
    L5P Duramax OE Replacement Radiator CSF 3843
    L5P Duramax OE Replacement Radiator CSF 3843 $418.02
    Fits: L5P Duramax 2017+
    Duramax Billet Coolant Block Off Plate XDP XD344
    Duramax Billet Coolant Block Off Plate XDP XD344 $64.95
    Fits: Duramax 2001-2017
    Duramax Radiator Coolant Drain Pipe XDP XD328
    Duramax Radiator Coolant Drain Pipe XDP XD328 $59.95
    Fits: Duramax 2006-2019
    L5P Duramax Water Pump Alliant AP63586
    L5P Duramax Water Pump Alliant AP63586 $124.91
    Fits: L5P Duramax 2017-2020
    Duramax Water Pump Pipe To Oil Cooler Seal GM 94011702
    Duramax Water Pump Pipe To Oil Cooler Seal GM 94011702 $32.03
    Fits: Duramax 2001-2019
    L5P Duramax Aluminum Performance Radiator Mishimoto MMRAD-DMAX-17
    L5P Duramax Aluminum Performance Radiator Mishimoto MMRAD-DMAX-17 $1,561.95
    Fits: L5P Duramax 2017-2019
    Duramax Coolant Block-Off Plate Fleece FPE-DMAX-CBOP
    Duramax Coolant Block-Off Plate Fleece FPE-DMAX-CBOP $55.00
    Fits: Duramax 2001-2017
    Pre-Formed 5/8 Inch Coolant Hose With 90 Degree Ends Fleece FPE-34574-A
    Pre-Formed 5/8 Inch Coolant Hose With 90 Degree Ends Fleece FPE-34574-A $24.28
    Fits: Universal - Many Applications
    5/8 Inch Hose With 90 Degree Ends & 5/8 Inch T-Fitting Fleece FPE-34257-A
    5/8 Inch Hose With 90 Degree Ends & 5/8 Inch T-Fitting Fleece FPE-34257-A $28.84
    Fits: Universal - Many Applications
    5/8 Inch Coolant Hose W/ 90 Degree Ends & 1 Inch T-Fitting Fleece FPE-34258-A
    5/8 Inch Coolant Hose W/ 90 Degree Ends & 1 Inch T-Fitting Fleece FPE-34258-A $32.23
    Fits: Universal - Many Applications
    -10AN Male To 1.325 Inch Adapter Fitting Fleece FPE-34224-B
    -10AN Male To 1.325 Inch Adapter Fitting Fleece FPE-34224-B $33.95
    Fits: Universal
    Duramax 01-19 Rear 180 Degree Thermostat AcDelco 131-131
    Duramax 01-19 Rear 180 Degree Thermostat AcDelco 131-131 $44.84
    Fits: Duramax 2001-2019
    LMM|L5P Duramax Surge Tank Radiator Overflow Side Pressure Cap AcDelco 13502353
    LMM|L5P Duramax Surge Tank Radiator Overflow Side Pressure Cap AcDelco 13502353 $13.63
    Fits: LMM|L5P Duramax 2007-2010 | 2017-2022
    Duramax Lower Radiator Hose Retainer GMC 15075709
    Duramax Lower Radiator Hose Retainer GMC 15075709 $17.49
    Fits: Duramax 2001-2019
    L5P Duramax Thermostat Bypass Pipe O-Ring AcDelco 12658352
    L5P Duramax Thermostat Bypass Pipe O-Ring AcDelco 12658352 $7.21
    Fits: 2500HD/3500 Silverado | Sierra 2017-2022
    Duramax 01-22 Water Pump Stud AcDelco 11611145
    Duramax 01-22 Water Pump Stud AcDelco 11611145 $7.21
    Fits: 2500HD/3500 Silverado | Sierra 2001-2022
    L5P Duramax Radiator Coolant Surge Tank AcDelco 84257137
    L5P Duramax Radiator Coolant Surge Tank AcDelco 84257137 $149.01
    Fits: L5P Duramax 2017-2019
    Duramax Lower Radiator Insulator AcDelco 89019121
    Duramax Lower Radiator Insulator AcDelco 89019121 $33.61
    Fits: 2500HD/3500 Silverado | Sierra 2001-2019
    L5P Duramax Silicone Radiator Hose Kit Mishimoto MMHOSE-DMAX-17
    L5P Duramax Silicone Radiator Hose Kit Mishimoto MMHOSE-DMAX-17 $418.95
    Fits: L5P Duramax 2017-2019
    L5P Duramax Coolant Pipe O-Ring Mahle C33756
    L5P Duramax Coolant Pipe O-Ring Mahle C33756 $3.82
    Fits: L5P Duramax 2017-2020
    Black Coolant Block-Off Plate PPE 119000820
    Black Coolant Block-Off Plate PPE 119000820 $53.99
    Fits: Duramax 2001-2024
    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
    L5P Duramax Silicone Upper & Lower Radiator Hose Kit PPE 119020400
    L5P Duramax Silicone Upper & Lower Radiator Hose Kit PPE 119020400 $269.99
    Fits: L5P Duramax 2017-2019
    L5P Duramax OEM Style Replacement Auxiliary Radiator CSF 3938
    L5P Duramax OEM Style Replacement Auxiliary Radiator CSF 3938 $116.63
    Fits: L5P Duramax 2020-2021