
COOLING SYSTEM
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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CPP PRE-MADE BRAIDED FUEL, OIL AND COOLANT HOSES MADE TO ORDER
CPP DIESEL
CPP Pre-Made Braided Fuel, Oil, and Coolant Hoses are the ultimate solution for automotive enthusiasts and professionals seeking tailored performance in their vehicles. Crafted with precision, these hoses are custom-made to order for a variety of...Qty in Cart: 0Quantity:Price:Subtotal: -
ALLIANT AP63566 WATER PUMP HOUSING FOR 01-05 GM 6.6L DURAMAX
ALLIANT POWER
$86.47Specifications Vendor No.Alliant PowerManufacturing LabelNewGross Weight (LB)26.636Country/Region of Origin CodeUSItem UPC/EAN Number843497103676No.APP1505The Alliant AP63566 Water Pump Housing is an essential component designed to provide optimal...$86.47 -
ALLIANT AP63586 WATER PUMP FOR 17-24 GM 6.6L DURAMAX L5P
ALLIANT POWER
$139.14Specifications Vendor No.Alliant PowerManufacturing LabelNewGross Weight (LB)3.21Country/Region of Origin CodeCNItem UPC/EAN Number843497105250No.APP40461The Alliant AP63586 Water Pump is engineered specifically for use with the 2017-2024 GM 6.6L Duramax...$139.14 -
ALLIANT AP63508 WATER PUMP HOUSING FOR 06-16 GM 6.6L DURAMAX
ALLIANT POWER
$91.87Specifications Vendor No.Alliant PowerManufacturing LabelNewGross Weight (LB)7.417Country/Region of Origin CodeUSItem UPC/EAN Number843497105113No.APP40491The Alliant AP63508 Water Pump Housing is an essential component designed specifically for the...$91.87 -
ALLIANT AP63562 WATER PUMP FOR 01-05 GM 6.6L DURAMAX
ALLIANT POWER
$158.33Specifications Vendor No.Alliant PowerManufacturing LabelNewGross Weight (LB)0.003Country/Region of Origin CodeCNItem UPC/EAN Number843497103638No.APP1509The Alliant AP63562 Water Pump is the ultimate replacement solution for your 2001-2005 GM 6.6L...$158.33 -
ALLIANT AP63563 WATER PUMP FOR 06-16 GM 6.6L DURAMAX
ALLIANT POWER
$212.67Specifications Vendor No.Alliant PowerManufacturing LabelNewGross Weight (LB)0.016Country/Region of Origin CodeCNItem UPC/EAN Number843497103645No.APP1508The Alliant AP63563 Water Pump is a high-performance component crafted specifically for 2006-2016 GM...$212.67 -
MAHLE C33756 COOLANT PIPE O-RING FOR 2017-2020 GM 6.6L DURAMAX ENGINE
MAHLE
$3.29AutoCare brands Id FLHQ AutoCare brand MAHLE Environmentally hazardous material No The MAHLE C33756 Coolant Pipe O-Ring is a crucial component designed specifically for the 2017-2020 GM 6.6L Duramax L5P engines. This high-quality O-ring plays a...$3.29 -
FLEECE FPE-HAR-DMAX-FAN-LML DURAMAX FAN EXTENSION HARNESS (LML)
FLEECE PERFORMANCE
$45.99Our replacement fan extension harness for the 2011-2016 LML Duramax allows you to repair a broken or damaged harness without needing to replace the entire fan assembly. This harness is mounted to the fan assembly and connects to the fan and chassis...$45.99 -
FLEECE FPE-HAR-DMAX-FAN-L5P DURAMAX FAN EXTENSION HARNESS (L5P)
FLEECE PERFORMANCE
$45.99Our replacement fan extension harness for the 2017-2019 L5P Duramax allows you to repair a broken or damaged harness without needing to replace the entire fan assembly. This harness is mounted to the fan assembly and connects to the fan and chassis...$45.99 -
MAHLE GS33752 WATER PUMP GASKET KIT FOR 2001-2010 GM 6.6L DURAMAX ENGINE
MAHLE
$21.80Type a description for this product here...The MAHLE GS33752 Water Pump Gasket Kit is specifically designed for GM 6.6L Duramax engines, covering the LB7, LLY, LBZ, and LMM models manufactured between 2001 and 2010. This high-quality gasket kit is an...$21.80 -
MAHLE C31900 COOLANT THERMOSTAT HOUSING GASKET FOR 2001-2016 GM 6.6L DURAMAX ENGINE
MAHLE
$7.44Item Grade OEM Standard Additional Package Contents None Gasket Material Steel The MAHLE C31900 Coolant Thermostat Housing Gasket is an essential component for maintaining optimal performance in your GM 6.6L Duramax engine, covering the LB7, LLY,...$7.44 -
BOSTECH WP01100 WATER PUMP 2001-2005 GM 6.6L DURAMAX LB7/LLY
BOSTECH FUEL
$104.95Bostech's line of new heavy-duty water pumps are backed by our 24-month unlimited mileage warranty. We offer 50 plus skus covering most diesel engine applications. Our pumps are quality engineered according to the OEM's design and assembled with...$104.95 -
BOSTECH WP01101 WATER PUMP 2006-2010 GM 6.6L DURAMAX LBZ/LMM
BOSTECH FUEL
$119.95Bostech's line of new heavy-duty water pumps are backed by our 24-month unlimited mileage warranty. We offer 50 plus skus covering most diesel engine applications. Our pumps are quality engineered according to the OEM's design and assembled with...$119.95 -
BOSTECH BTS011012 COOLANT TEMPERATURE SENSOR 2001-2009 GM 6.6L DURAMAX LB7/LLY/LBZ/LMM | 1995-2000 GM 6.5L DIESEL
BOSTECH FUEL
$18.85Engine Coolant Temperature Sensor Brand: BT Power Condition: New Limited 24-Month Unlimited mileage warranty Wiring Pigtail Included Engine Fitment: Various General Motors The BOSTECH BTS011012 Coolant Temperature Sensor is designed to...$18.85 -
PPE 119020010 EGR TO CAB COOLANT HOSE FOR 01-10 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: 1-ply heat-resistant internal fibers Durable, 5 mm thick silicone O.D. size: 24mm (15/16”) Best...$11.69 -
PPE 119020011 ENGINE TO CAB COOLANT HOSE FOR 11-16 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. GM Equivalent P/N: 20984280 Use with 119020009 1999-2016 GM Stainless Steel Heater Hose Connector...$10.79 -
PPE 119021004 EGR TO CAB COOLANT HOSE (CA) FOR 02 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 FOR 04.5-10 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. Inner diameter of hose is 5/8 in GM Equivalent P/N: 97333410 Use with 119020009 1999-2016 GM...$12.14 -
PPE 119021010 EGR TO CAB COOLANT HOSE FOR 07.5-10 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 FOR 11-16 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. GM Equivalent P/N: 12639068 Use with 119020009 1999-2016 GM Stainless Steel Heater Hose Connector. Features:...$11.65 -
PPE 119021100 COOLANT HOSE KIT-RED FOR 01-05 GM DURAMAX 6.6L LB7/LLY
PACIFIC PERFORMANCE ENGINEERING
$269.99Factory coolant hose T fittings are molded hose or made out of plastic and are prone to cracking at junctions, causing coolant loss. Replace your worn or leaky factory coolant hose system with PPE's performance Silicone Coolant Hose Kit. Perfect FOR your...$269.99 -
PPE 119021300 COOLANT HOSE KIT-RED FOR 11-16 GM DURAMAX 6.6L LML
PACIFIC PERFORMANCE ENGINEERING
$269.99The PPE 119021300 Coolant Hose Kit in striking red is tailored specifically FOR the FOR 11-16 GM Duramax 6.6L LML engine, offering a superior alternative to the factory coolant hose system. Say goodbye to the risk of cracking and coolant leaks with this...$269.99 -
PPE 119023100 COOLANT HOSE KIT-GREEN FOR 01-05 GM DURAMAX 6.6L LB7/LLY
PACIFIC PERFORMANCE ENGINEERING
$269.99Factory coolant hose T fittings are molded hose or made out of plastic and are prone to cracking at junctions, causing coolant loss. Replace your worn or leaky factory coolant hose system with PPE's performance Silicone Coolant Hose Kit. Perfect FOR your...$269.99 -
PPE 119023200 COOLANT HOSE KIT-GREEN FOR 06-10 GM DURAMAX 6.6L LBZ/LMM
PACIFIC PERFORMANCE ENGINEERING
$269.99Factory coolant hose T fittings are molded hose or made out of plastic and are prone to cracking at junctions, causing coolant loss. Replace your worn or leaky factory coolant hose system with PPE's performance Silicone Coolant Hose Kit. Perfect FOR your...$269.99 -
PPE 119023300 COOLANT HOSE KIT-GREEN FOR 11-16 GM DURAMAX 6.6L LML
PACIFIC PERFORMANCE ENGINEERING
$269.99Replacing worn or faulty coolant hoses in your FOR 11-16 GM Duramax 6.6L LML is made easy with the PPE 119023300 Coolant Hose Kit in vibrant green. Say goodbye to the risk of coolant loss and cracked junctions that typically come with factory T fittings,...$269.99 -
PPE 119024100 COOLANT HOSE KIT-YELLOW FOR 01-05 GM DURAMAX 6.6L LB7/LLY
PACIFIC PERFORMANCE ENGINEERING
$269.99Factory coolant hose T fittings are molded hose or made out of plastic and are prone to cracking at junctions, causing coolant loss. Replace your worn or leaky factory coolant hose system with PPE's performance Silicone Coolant Hose Kit. Perfect FOR your...$269.99 -
PPE 119024200 COOLANT HOSE KIT-YELLOW FOR 06-10 GM DURAMAX 6.6L LBZ/LMM
PACIFIC PERFORMANCE ENGINEERING
$269.99Factory coolant hose T fittings are molded hose or made out of plastic and are prone to cracking at junctions, causing coolant loss. Replace your worn or leaky factory coolant hose system with PPE's performance Silicone Coolant Hose Kit. Perfect FOR your...$269.99 -
PPE 119024300 COOLANT HOSE KIT-YELLOW FOR 11-16 GM DURAMAX 6.6L LML
PACIFIC PERFORMANCE ENGINEERING
$269.99Elevate the performance and reliability of your FOR 11-16 GM Duramax 6.6L LML diesel truck with the PPE 119024300 Coolant Hose Kit in striking yellow. Say goodbye to cracked plastic T fittings and hello to enhanced durability and efficiency. Designed to...$269.99 -
PPE 119025100 COOLANT HOSE KIT-ORANGE FOR 01-05 GM DURAMAX 6.6L LB7/LLY
PACIFIC PERFORMANCE ENGINEERING
$269.99Factory coolant hose T fittings are molded hose or made out of plastic and are prone to cracking at junctions, causing coolant loss. Replace your worn or leaky factory coolant hose system with PPE's performance Silicone Coolant Hose Kit. Perfect FOR your...$269.99 -
PPE 119025200 COOLANT HOSE KIT-ORANGE FOR 06-10 GM DURAMAX 6.6L LBZ/LMM
PACIFIC PERFORMANCE ENGINEERING
$269.99Factory coolant hose T fittings are molded hose or made out of plastic and are prone to cracking at junctions, causing coolant loss. Replace your worn or leaky factory coolant hose system with PPE's performance Silicone Coolant Hose Kit. Perfect FOR your...$269.99 -
PPE 119025300 COOLANT HOSE KIT-ORANGE FOR 11-16 GM DURAMAX 6.6L LML
PACIFIC PERFORMANCE ENGINEERING
$269.99Upgrade the coolant system in your FOR 11-16 GM Duramax 6.6L LML diesel truck with the PPE 119025300 Coolant Hose Kit in vibrant orange. Say goodbye to the issues of cracked plastic T fittings with this high-performance silicone coolant hose kit from PPE...$269.99 -
PPE 116454025 COOLANT OVERFLOW TANK FOR 01-07 GM 6.6L DURAMAX LB7/LLY/LBZ
PACIFIC PERFORMANCE ENGINEERING
$269.99The PPE Coolant Overflow Tank will hold up to one gallon of coolant. Hand-cut 6061 aluminum material provides more efficient cooling properties. This tank utilizes the location of your second battery and plastic water overflow tank. Easy installation...$269.99 -
PPE 116454075 COOLANT OVERFLOW TANK FOR 07.5-10 DURAMAX 6.6L LMM
PACIFIC PERFORMANCE ENGINEERING
$269.99The PPE Coolant Overflow Tank will hold up to one gallon of coolant. Hand-cut 6061 aluminum material provides more efficient cooling properties. This tank utilizes the location of your second battery and plastic water overflow tank. Easy installation...$269.99 -
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 The...$53.99 -
PPE 119000500 ENGINE COOLANT THERMOSTAT HOUSING FOR 01-07 GM 6.6L DURAMAX LB7/LLY/LBZ
PACIFIC PERFORMANCE ENGINEERING
$269.99Corrosion is often seen on this stock part as they age out. This can lead to blockage and reduced cooling capability. Replace your corroded OEM thermostat housing bridge with the PPE high-strength, cast-aluminum Thermostat Housing. This high-quality...$269.99 -
PPE 119000510 ENGINE COOLANT THERMOSTAT HOUSING - SINGLE SENSOR FOR 07.5-10 GM 6.6L DURAMAX LMM
PACIFIC PERFORMANCE ENGINEERING
$269.99Corrosion is often seen on this stock part as they age out. This can lead to blockage and reduced cooling capability. Replace your corroded OEM thermostat housing bridge with the PPE high-strength, cast-aluminum Thermostat Housing. This high-quality...$269.99 -
PPE 119000515 ENGINE COOLANT THERMOSTAT HOUSING - DUAL SENSOR FOR 07.5-10 GM 6.6L DURAMAX LMM
PACIFIC PERFORMANCE ENGINEERING
$269.99Corrosion is often seen on this stock part as they age out. This can lead to blockage and reduced cooling capability. Replace your corroded OEM thermostat housing bridge with the PPE high-strength, cast-aluminum Thermostat Housing. This high-quality...$269.99 -
PPE 119000530 THERMOSTAT HOUSING COVER RAW FOR 01-04 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 FOR 01-04 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 FOR 04-10 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 FOR 04-10 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 FOR 01-10 GM 6.6L DURAMAX LB7/LLY/LBZ
PACIFIC PERFORMANCE ENGINEERING
$116.99Features: Fully-polished 304 stainless steel CNC machined tube end Comes with two Viton O-rings VEHICLE FITMENT: 2005 GMC Sierra 3500HD 8 Cyl 6.6 Liter Turbo 2005 GMC Sierra 2500HD 8 Cyl 6.6 Liter Turbo 2005 Chevrolet Silverado 3500HD 8...$116.99 -
PPE 119000730 COOLANT BYPASS TUBE - WATER PUMP TO THERMOSTAT HOUSING FOR 01-10 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. Features: Fully-polished 304 stainless steel CNC...$116.99 -
PPE 119000820 COOLANT BLOCK-OFF PLATE - BILLET ALUMINUM - BLACK FOR 01-20 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. PART...$53.99 -
PPE 119001000 ENGINE COOLANT RETURN PIPE-304SS RAW FOR 01-04 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 FOR 01-04 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 FOR 04-05 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 FOR 04-05 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 FOR 06-07 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 FOR 06-10 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 FOR 01-16 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 -
PPE 119030100 COOLANT TUBE PUMP TO OIL COOLER 304 STAINLESS STEEL RAW FOR 01-23 GM 6.6L DURAMAX LB7/LLY/LBZ/LMM/LML/L5P
PACIFIC PERFORMANCE ENGINEERING
$197.99The PPE 119030100 Coolant Tube Pump to Oil Cooler is a top-quality performance upgrade designed FOR the FOR 01-23 GM 6.6L Duramax LB7/LLY/LBZ/LMM/LML/L5P models. Crafted from durable 304 stainless steel, this custom coolant pipe boasts superior corrosion...$197.99 -
PPE 119030130 COOLANT TUBE PUMP TO OIL COOLER 304 STAINLESS STEEL POLISHED FOR 01-23 GM 6.6L DURAMAX LB7/LLY/LBZ/LMM/LML/L5P
PACIFIC PERFORMANCE ENGINEERING
$197.99