COOLING SYSTEM
Duramax engines are known for their power and durability. A duramax radiator replacement can significantly improve your vehicle's performance. Consider an electric fan conversion kit to enhance your duramax cooling upgrade. A high-quality duramax radiator hose is essential for maintaining an efficient duramax cooling system. For those with an LMM or LLY model, cooling improvements and system upgrades can lead to better engine health. The 07 duramax radiator improvement and 06 duramax cooling optimization are specific tweaks that can yield noticeable results. By choosing the best cooling system for duramax, including aftermarket cooling parts like an upper radiator hose duramax or a duramax coolant solution, you ensure your engine runs cooler and lasts longer. Whether you need lmm radiator enhancements, lly radiator hose replacement, 07 duramax coolant upgrade, or 06 duramax radiator options, investing in quality duramax cooling components is a smart move for any Duramax owner.
A truly high-performance diesel engine is going to be generating a lot of heat, and you want to make sure your cooling system is up to speed. Cooler air flow allows for a higher density air delivery as well, increasing power and performance. CPP Diesel carries Duramax electric fans, Duramax radiator fans, and a variety of other parts and components you need to properly cool your Duramax engine.
Quality Parts You Need
We have it all: radiator fans, single and dual output fans, radiators, hose kits, and other quality parts from premium names like Derale and Mishimoto. As passionate diesel enthusiasts, we work hard to stock every part and component that diesel drivers want, and we seek to do it with the finest customer service on the web. On most orders placed before 2:00 P.M. EST, we ship out the parts as soon as we get the order.
Order Yours Today
Check out our vast selection of Duramax electric fans, Duramax radiator fans, and other essential cooling system parts. If you aren't seeing the product you are looking for, or you have a question about a particular part, don't hesitate to call us at 724-785-4022, or drop us a message and we'll get back to you as soon as we can. Order your parts today!
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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 -
WEHRLI WCF100622 | 2006-2010 LBZ/LMM DURAMAX UPPER COOLANT PIPE
WEHRLI CUSTOM FABRICATION
$130.95Aluminum Upper Coolant Pipe for 2006-2010 LBZ/LMM 6.6L Duramax equipped Chevrolet Silverado / GMC Sierra 2500 / 3500 HD truck replaces the OEM rubber upper coolant hose and comes powder coated color of choice! NOTE: This pipe does not come with a WCFab...$130.95 -
XDP XD374 X-TRA COOL DIRECT-FIT RADIATOR CLUTCH FAN BLADE 2001-2005 GM DURAMAX 6.6L LLY/LBZ LB7/LLY
XTREME DIESEL PERFORMANCE
$75.95Don't let your 2001-2005 GM 6.6L Duramax overheat due to a broken or damaged fan, replace it with the XDP X-TRA Cool Direct-Fit Radiator Clutch Fan Blade XD374. Keeping your engine temperatures in check is crucial when it comes to longevity and...$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
$64.95Put the XDP Billet Coolant Block-Off Plate XD344 in your 2011-2017 GM 6.6L Duramax to permanently eliminate coolant leaks from the rear housing on your LML and L5P engine. The factory cover uses a gasket and over time the plate can warp, and the gaskets...$64.95 -
XDP XD328 RADIATOR DRAIN PIPE 2006-2019 GM DURAMAX 6.6L LLY/LBZ/LMM/LML
XTREME DIESEL PERFORMANCE
$59.95Eliminate the hassle of servicing the cooling system in your 2006-2019 GM 6.6L Duramax with the XDP Duramax Radiator Drain Pipe XD328. Draining the cooling system in your truck requires removal of the lower radiator hose. Once that hose is removed,...$59.95 -
WEHRLI WCF100472 2001+ CHEVROLET DURAMAX/13-18 6.7L DODGE CUMMINS BILLET ALUMINUM COOLANT TANK CAP - CLEAR
WEHRLI CUSTOM FABRICATION
$35.8418-20PSI Replacement Coolant Tank Cap, Clear Anodized. Used on WCFab Fabricated Coolant Tanks on 2001+ Duramax or 2013-2018 6.7L Cummins.$35.84 -
WEHRLI WCF100860 2001-2005 LB7 / LLY DURAMAX UPPER COOLANT PIPE
WEHRLI CUSTOM FABRICATION
$130.95Aluminum Upper Coolant Pipe for LB7/LLY Duramax replaces the OEM rubber upper coolant hose and comes powder coated color of choice! NOTE: this pipe does not come standard with a WCFab badge like the other model year coolant pipes. Replaces the...$130.95 -
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 Chevrolet Duramax low-temperature thermostats activate at a lower temperature than the OEM thermostats, making them the perfect solution for Duramax owners who live in warmer climates or use their trucks under heavy load or strenuous...$87.95 -
MISHIMOTO MMTS-CHV-01DH HIGH TEMPERATURE THERMOSTATS (SET OF 2) 2001-2016 GM DURAMAX 6.6L
MISHIMOTO
$85.95The Mishimoto Chevrolet Duramax high-temperature thermostats activate at a higher temperature than the OEM thermostats, making them the perfect solution for Duramax owners who live in colder climates or have trouble reaching operating temperatures...$85.95 -
MISHIMOTO MMFAN-MOUNT Electric Fan Mounting Kit
MISHIMOTO
$13.95The Mishimoto universal fan mount kit is used to mount a Mishimoto electric fan to any Mishimoto aluminum radiator. Great for custom applications, the Mishimoto fan can be mounted in any convenient position on the radiator. Universal fan...$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 and stop the coolant leaks for good! Our blocking plate is thicker than the stock plate and has an integral square cut O-ring with no gasket required. OE covers are prone to leakage over time, our billet coolant block off...$55.00 -
FLEECE FPE-LML-CP REAR ENGINE COVER COOLANT RETURN PLUG 2011-2016 GM DURAMAX LML
FLEECE PERFORMANCE
$19.992011+ Duramax LML Rear Engine Cover Coolant Return Plug. The plug is made from high quality 6061 aluminum, anodized black, and laser etched with the Fleece Performace "F". It comes complete with a high temperature silicone o-ring to ensure you won't have...$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 designed to eliminate the stock coolant feed line when installing a non-water-cooled turbocharger on your Duramax. It provides clearance for larger intake plumbing, is CNC machined from...$37.95