COOLING SYSTEM
Upgrade your Duramax cooling system with our wide selection of high-quality parts and components. From radiator fans to hose kits, we have everything you need to keep your engine running cool and performing at its best.
Cooling system upgrades are essential for maintaining engine health, especially for LMM or LLY models. Improve your vehicle's performance by investing in a Duramax radiator replacement or an electric fan conversion kit. Our aftermarket cooling parts like upper radiator hoses and coolant solutions are designed to help your engine run cooler and last longer.
At CPP Diesel, we pride ourselves on carrying top brands like Derale and Mishimoto to ensure that you're getting the best quality parts for your Duramax engine. With our fast shipping and exceptional customer service, you can trust us to provide you with the products you need to enhance your cooling system.
Don't let your engine overheat - shop our selection of Duramax electric fans, radiators, and other essential cooling system parts today. If you have any questions or can't find what you're looking for, feel free to reach out to us. Order your Duramax cooling system parts from CPP Diesel and keep your engine running cool.
Cooling system upgrades are essential for maintaining engine health, especially for LMM or LLY models. Improve your vehicle's performance by investing in a Duramax radiator replacement or an electric fan conversion kit. Our aftermarket cooling parts like upper radiator hoses and coolant solutions are designed to help your engine run cooler and last longer.
At CPP Diesel, we pride ourselves on carrying top brands like Derale and Mishimoto to ensure that you're getting the best quality parts for your Duramax engine. With our fast shipping and exceptional customer service, you can trust us to provide you with the products you need to enhance your cooling system.
Don't let your engine overheat - shop our selection of Duramax electric fans, radiators, and other essential cooling system parts today. If you have any questions or can't find what you're looking for, feel free to reach out to us. Order your Duramax cooling system parts from CPP Diesel and keep your engine running cool.
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DORMAN 603-142 COOLANT RESERVOIR 2007.5-2010 GM SILVERADO/SIERRA 2500HD/3500HD 6.6L DURAMAX LMM
DORMAN
$45.95This replacement engine coolant reservoir is manufactured from quality materials to withstand the stresses of underhood heat and engine vibration. It is engineered and manufactured to match the fit and function of the original part. Direct...$45.95 -
DORMAN 902-2127 COOLANT THERMOSTAT HOUSING (UPPER) 2004.5-2010 GM 6.6L DURAMAX LLY/LBZ/LMM
DORMAN
$60.52This replacement engine coolant thermostat housing is engineered to match the fit and durability of the stock thermostat housing on specified vehicles. It is designed to withstand extreme temperature changes to extend service life. Ideal replacement...$60.52 -
DORMAN 800-409 Coolant Connector - Inlet/Outlet 3/4In. Tube x 5/8In. Hose 2001-2014 GM 6.6L DURAMAX LB7/LLY/LMM/LML
DORMAN
$10.99Made of quality materials, this HVAC heater hose connector matches the fit and function of an original equipment connector to restore leak-free performance. Quality replacement - this heater hose connector matches the fit and function of the original...$10.99 -
DORMAN 902-901 Thermostat Bypass Pipe 2001-2005 GM 6.6L DURAMAX LB7/LLY
DORMAN
$33.95This thermostat bypass pipe is designed to match the fit and function of the original pipe on specified applications and is engineered for reliable performance and durability. Direct replacement - this thermostat bypass pipe is designed to match the...$33.95 -
DORMAN 926-424 Coolant Bypass Tube O-Ring Kit 2001-2016 GM 6.6L DURAMAX LB7/LLY/LBZ/LMM/LML
DORMAN
$6.76This coolant O-ring kit contains all the necessary O-rings to replace or repair the engine coolant pipe on specified vehicles. Ideal replacement - this coolant O-ring kit matches the factory O-rings to ensure a complete and reliable repair Durable...$6.76 -
PPE 119020010 EGR TO CAB COOLANT HOSE 2001-2010 GM 6.6L DURAMAX LB7/LLY/LBZ
PACIFIC PERFORMANCE ENGINEERING
$11.69Designed for factory fit, these durable 5mm performance silicone hoses are a perfect upgrade when your worn coolant hoses need replacing.Features: EGR to Cab Coolant Hose Made from Silicone Sold Individually Applications: 2001-2010 GM 6.6L Duramax...$11.69 -
PPE 119020011 ENGINE TO CAB COOLANT HOSE 2011-2016 GM DURAMAX 6.6L LML
PACIFIC PERFORMANCE ENGINEERING
$10.79Designed for factory fit, these durable 5mm performance silicone hoses are a perfect upgrade when your worn coolant hoses need replacing.Features: Engine to Cab Coolant Hose 1-Ply heat-resistant internal fibers Made from durable, 5mm thick Silicone Sold...$10.79 -
PPE 119021004 EGR TO CAB COOLANT HOSE (CA) 2002 GM DURAMAX 6.6L LB7
PACIFIC PERFORMANCE ENGINEERING
$10.79Designed for factory fit, these durable 5mm performance silicone hoses are a perfect upgrade when your worn coolant hoses need replacing.Features: Silicone EGR to Cab Coolant Hose - Black 1-ply heat-resistant internal fibers Durable, 5mm thick silicone...$10.79 -
PPE 119021007 EGR TO CAB COOLANT HOSE 2004.5-2010 GM 6.6L DURAMAX LLY/LBZ/LMM
PACIFIC PERFORMANCE ENGINEERING
$12.14Designed for factory fit, these durable 5mm performance silicone hoses are a perfect upgrade when your worn coolant hoses need replacing.Features: Silicone EGR to Cab Coolant Hose 1-ply heat-resistant internal fibers Durable, 5mm thick silicone Sold...$12.14 -
PPE 119021010 EGR TO CAB COOLANT HOSE 2007.5-2010 DURAMAX 6.6L LMM
PACIFIC PERFORMANCE ENGINEERING
$15.29Designed for factory fit, these durable 5mm performance silicone hoses are a perfect upgrade when your worn coolant hoses need replacing.Features: Silicone EGR to Cab Coolant Hose 1-ply heat-resistant internal fibers Durable, 5mm thick silicone Sold...$15.29 -
PPE 119021011 EGR TO CAB COOLANT HOSE 2011-2016 GM DURAMAX 6.6L LML
PACIFIC PERFORMANCE ENGINEERING
$11.65Designed for factory fit, these durable 5mm performance silicone hoses are a perfect upgrade when your worn coolant hoses need replacing.Features: Silicone EGR to Cab Coolant Hose 1-ply heat-resistant internal fibers Durable, 5mm thick silicone Sold...$11.65 -
PPE 116454080 HOSE KIT FOR COOLANT TANK UNIVERSAL
PACIFIC PERFORMANCE ENGINEERING
$53.99The PPE Coolant Overflow Tank Hose Kit to complements your overflow tank install.Features: Hose Kit for Coolant Overflow 3/8 Inch NPT to 1/2 Inch Brass Hose Barb 3/4 Inch NPT to 1 Inch Brass Hose Barb Includes Hoses Easy installation Sold As A Kit$53.99 -
PPE 119000530 THERMOSTAT HOUSING COVER RAW 2001-2004 GM DURAMAX 6.6L LB7
PACIFIC PERFORMANCE ENGINEERING
$107.99Rust is the enemy of your coolant system. Upgrade your rusty OEM thermostat housing cover with a Cast 304 Stainless Steel Thermostat Housing Cover from PPE. This direct bolt-on replacement adds style and function to your engine bay. The stainless steel...$107.99 -
PPE 119000533 THERMOSTAT HOUSING COVER POLISHED 2001-2004 GM DURAMAX 6.6L LB7
PACIFIC PERFORMANCE ENGINEERING
$107.99Rust is the enemy of your coolant system. Upgrade your rusty OEM thermostat housing cover with a Cast 304 Stainless Steel Thermostat Housing Cover from PPE. This direct bolt-on replacement adds style and function to your engine bay. The stainless steel...$107.99 -
PPE 119000540 THERMOSTAT HOUSING COVER RAW 2004-2010 GM 6.6L DURAMAX LLY/LMM
PACIFIC PERFORMANCE ENGINEERING
$107.99Rust is the enemy of your coolant system. Upgrade your rusty OEM thermostat housing cover with a Cast 304 Stainless Steel Thermostat Housing Cover from PPE. This direct bolt-on replacement adds style and function to your engine bay. The stainless steel...$107.99 -
PPE 119000543 THERMOSTAT HOUSING COVER LLY LBZ LMM - POLISHED 2004-2010 GM 6.6L DURAMAX LLY/LBZ/LMM
PACIFIC PERFORMANCE ENGINEERING
$107.99Rust is the enemy of your coolant system. Upgrade your rusty OEM thermostat housing cover with a Cast 304 Stainless Steel Thermostat Housing Cover from PPE. This direct bolt-on replacement adds style and function to your engine bay. The stainless steel...$107.99 -
PPE 119000630 COOLANT BYPASS TUBE - WATER PUMP TO THERMOSTAT HOUSING 2001-2010 GM 6.6L DURAMAX LB7/LLY/LBZ
PACIFIC PERFORMANCE ENGINEERING
$116.99Specifically designed for use with the factory water pump. Fully polished 304 stainless steel construction looks great and prevents corrosion. The OEM mild steel pipe rusts and eventually leaks.$116.99 -
PPE 119000730 COOLANT BYPASS TUBE - WATER PUMP TO THERMOSTAT HOUSING 2001-2010 GM 6.6L DURAMAX LB7/LLY/LBZ
PACIFIC PERFORMANCE ENGINEERING
$116.99Specifically designed for use with the factory water pump. Fully polished 304 stainless steel construction looks great and prevents corrosion. The OEM mild steel pipe rusts and eventually leaks.$116.99 -
PPE 119000820 COOLANT BLOCK-OFF PLATE - BILLET ALUMINUM - BLACK 2001-2020 GM 6.6L DURAMAX LB7/LLY/LBZ/LMM/LML/L5P
PACIFIC PERFORMANCE ENGINEERING
$53.99The OEM block off plate uses a gasket and can leak over time. The PPE billet block off plate is thicker and uses an O-ring seal. The O-ring is made from Viton more maximum longevity. The PPE billet block off plate installs using the OEM fasteners.$53.99 -
PPE 119001000 ENGINE COOLANT RETURN PIPE-304SS RAW 2001-2004 GM DURAMAX 6.6L LB7
PACIFIC PERFORMANCE ENGINEERING
$89.99Specifically designed for use in conjunction with the factory thermostat housing. 304 stainless steel construction prevents corrosion compared with OEM mild steel pipe which is prone to rusting and eventually leaking. Allows for installation of factory...$89.99 -
PPE 119001030 ENGINE COOLANT RETURN PIPE-304SS POLISHED 2001-2004 GM DURAMAX 6.6L LB7
PACIFIC PERFORMANCE ENGINEERING
$98.99Specifically designed for use in conjunction with the factory thermostat housing. 304 stainless steel construction prevents corrosion compared with OEM mild steel pipe which is prone to rusting and eventually leaking. Allows for installation of factory...$98.99 -
PPE 119001100 ENGINE COOLANT RETURN PIPE-304SS RAW 2004.5-2005 GM DURAMAX 6.6L LLY
PACIFIC PERFORMANCE ENGINEERING
$89.99Specifically designed for use in conjunction with the factory thermostat housing. 304 stainless steel construction prevents corrosion compared with OEM mild steel pipe which is prone to rusting and eventually leaking. Allows for installation of factory...$89.99 -
PPE 119001130 ENGINE COOLANT RETURN PIPE-304SS POLISHED 2004.5-2005 GM DURAMAX 6.6L LLY
PACIFIC PERFORMANCE ENGINEERING
$98.99Specifically designed for use in conjunction with the factory thermostat housing. 304 stainless steel construction prevents corrosion compared with OEM mild steel pipe which is prone to rusting and eventually leaking. Allows for installation of factory...$98.99 -
PPE 119001200 ENGINE COOLANT RETURN PIPE 304SS RAW 2006-2007 GM DURAMAX 6.6L LLY/LBZ
PACIFIC PERFORMANCE ENGINEERING
$89.99Specifically designed for use in conjunction with the factory thermostat housing. 304 stainless steel construction prevents corrosion compared with OEM mild steel pipe which is prone to rusting and eventually leaking. Allows for installation of factory...$89.99 -
PPE 119001230 ENGINE COOLANT RETURN PIPE-304SS POLISHED 2006-2010 GM DURAMAX 6.6L LBZ/LMM
PACIFIC PERFORMANCE ENGINEERING
$98.99Specifically designed for use in conjunction with the factory thermostat housing. 304 stainless steel construction prevents corrosion compared with OEM mild steel pipe which is prone to rusting and eventually leaking. Allows for installation of factory...$98.99 -
PPE 119020009 HEATER HOSE CONNECTOR-STAINLESS STEEL 2001-2016 GM 6.6L DURAMAX LB7/LLY/LBZ/LMM/LML
PACIFIC PERFORMANCE ENGINEERING
$22.49The plastic HVAC heater hose connectors are a common failure point when the older part fatigues from heat and vibration. This PPE Stainless Steel Heater Hose Connector will provide excellent durability and corrosion resistance for the life of your...$22.49 -
XDP XD374 X-TRA COOL DIRECT-FIT RADIATOR CLUTCH FAN BLADE 2001-2005 GM DURAMAX 6.6L LLY/LBZ LB7/LLY
XTREME DIESEL PERFORMANCE
$75.95Ensure your 2001-2005 GM 6.6L Duramax engine stays cool and efficient with the XDP XD374 X-TRA Cool Direct-Fit Radiator Clutch Fan Blade. When it comes to your vehicle's performance and lifespan, maintaining proper engine temperatures is paramount. Don't...$75.95 -
BD DIESEL 1030607 10IN ELECTRIC COOLING FAN KIT-800 CFM UNIVERSAL
BD DIESEL
$77.9580-watt, 10-inch, 800 CFM universal electric fan. The fan is supplied as a "pusher" fan from factory which will draw air in through the grille of the fan and push that air into the radiator. This is ideal for installation on the front side...$77.95 -
XDP XD344 BILLET COOLANT BLOCK-OFF PLATE 2001-2022 GM DURAMAX 6.6L LB7/LLY/LBZ/LMM/LML/L5P
XTREME DIESEL PERFORMANCE
$64.95The XDP XD344 Billet Coolant Block-Off Plate is the perfect solution for owners of 2011-2017 GM 6.6L Duramax engines looking to permanently eliminate troublesome coolant leaks from the rear housing on their LML and L5P engines. Say goodbye to the...$64.95 -
XDP XD328 RADIATOR DRAIN PIPE 2006-2019 GM DURAMAX 6.6L LLY/LBZ/LMM/LML
XTREME DIESEL PERFORMANCE
$59.95The XDP XD328 Radiator Drain Pipe is a must-have product for owners of 2006-2019 GM Duramax 6.6L LLY/LBZ/LMM/LML trucks looking to simplify the process of servicing their cooling system. Say goodbye to the messy and inconvenient task of draining coolant...$59.95 -
WEHRLI WCF100472 2001+ CHEVROLET DURAMAX/13-18 6.7L DODGE CUMMINS BILLET ALUMINUM COOLANT TANK CAP - CLEAR
WEHRLI CUSTOM FABRICATION
$35.84The WEHRLI WCF100472 2001+ CHEVROLET DURAMAX/13-18 6.7L DODGE CUMMINS BILLET ALUMINUM COOLANT TANK CAP in clear is a top-of-the-line replacement coolant tank cap designed to meet the specific needs of vehicle owners with 2001+ Duramax or 2013-2018 6.7L...$35.84 -
PPE 119020086 1.75" COOLANT DRAIN TUBE SS W/1/4"NPT BUNG UNIVERSAL
PACIFIC PERFORMANCE ENGINEERING
$26.99Coolant Drain Tube - 1.75” - 304 Stainless Steel Now easily drain your cooling system with this painless upgrade. This quick install can be done right in your driveway and adds a service option to any vehicle that doesn't come with a factory...$26.99 -
PPE 119000100 COOLANT BLOCK OFF PLUG 2007.5-2010 GM 6.6L DURAMAX LMM
PACIFIC PERFORMANCE ENGINEERING
$35.99Coolant Block-Off Plug Duramax (LMM) Coolant Block-Off Plug by PPE®. Finish: Undefined. PPE is where engineering, design, and quality come together in perfect form. This superior product was crafted using modern manufacturing methods and high-grade...$35.99 -
PPE 116002060 LARGE DIAMETER (12.7MM) TURBO COOLANT HOSE 2006-2010 GM DURAMAX 6.6L LBZ/LMM
PACIFIC PERFORMANCE ENGINEERING
$8.99Time and under hood temperatures make the factory turbo coolant hose material brittle. Plus, if you replace your turbo or remove this small coolant hose, the factory rubber typically deforms or tears.The PPE Turbo Coolant Hose Performance Silicone Hose...$8.99 -
PPE 116002045 SMALL DIAMETER (10 MM) TURBO COOLANT HOSE 2001-2005 GM DURAMAX 6.6L LB7/LLY
PACIFIC PERFORMANCE ENGINEERING
$8.99Turbo Coolant Hose Small Diameter 10mm LB7 LLY Time and under hood temperatures make the factory turbo coolant hose material brittle. Plus, if you replace your turbo or remove this small coolant hose, the factory rubber typically deforms or tears.The PPE...$8.99 -
MISHIMOTO MMTS-CHV-01DL LOW TEMPERATURE THERMOSTATS (SET OF 2) 2001-2016 GM DURAMAX 6.6L
MISHIMOTO
$87.95The Mishimoto MMTS-CHV-01DL Low Temperature Thermostats are the ideal cooling solution for Chevrolet/GMC Duramax 6.6L engines from 2001 to 2016. Engineered to activate at a lower temperature compared to OEM thermostats, this set of two thermostats...$87.95 -
MISHIMOTO MMTS-CHV-01DH HIGH TEMPERATURE THERMOSTATS (SET OF 2) 2001-2016 GM DURAMAX 6.6L
MISHIMOTO
$85.95The Mishimoto MMTS-CHV-01DH High Temperature Thermostats (Set of 2) for 2001-2016 GM Duramax 6.6L engines are engineered to optimize the performance of your Chevrolet or GMC Duramax truck. These high-temperature thermostats are designed to activate at a...$85.95 -
MISHIMOTO MMFAN-MOUNT Electric Fan Mounting Kit
MISHIMOTO
$13.95The Mishimoto MMFAN-MOUNT Electric Fan Mounting Kit offers a versatile solution for securely mounting a Mishimoto electric fan to any Mishimoto aluminum radiator. Specifically designed for custom applications, this universal fan mount kit provides the...$13.95 -
FLEECE FPE-DMAX-CBOP COOLANT BLOCK OFF PLATE 2001-2016 GM 6.6L DURAMAX LB7/LLY/LBZ/LMM/LML
FLEECE PERFORMANCE
$55.00Upgrade your rear engine cover with the Fleece FPE-DMAX-CBOP Coolant Block Off Plate for 2001-2016 GM 6.6L Duramax LB7/LLY/LBZ/LMM/LML models and bid farewell to coolant leaks for good! This high-quality blocking plate is designed to outperform stock...$55.00 -
FLEECE FPE-LML-CP REAR ENGINE COVER COOLANT RETURN PLUG 2011-2016 GM DURAMAX LML
FLEECE PERFORMANCE
$19.99The Fleece FPE-LML-CP Rear Engine Cover Coolant Return Plug for the 2011-2016 GM Duramax LML is a premium solution to ensure optimal engine performance. Crafted from durable 6061 aluminum, this plug is designed to last. The sleek black anodized finish...$19.99 -
FLEECE FPE-TURBO-THERM THERMOSTAT DELETE PLUG 2001-2016 GM DURAMAX LLY/LB7/LMM/LBZ
FLEECE PERFORMANCE
$37.95The Fleece Performance Duramax Turbo Thermostat Delete Plug is the essential solution for those looking to enhance their Duramax engine performance. Specifically designed for 2001-2016 GM Duramax LLY/LB7/LMM/LBZ models, this plug is engineered to...$37.95