Duramax: 2001-2004 (LB7)
Suncoast CAT1 500 HP CUSTOM ALLISON TRANSMISSION WITH CONVERTER 4WD (GMAX-CAT1-LB7-0103-4WD) for 2001-2003 Duramax LB7
The Sun Coast CAT1 500 HP Allison transmission GMAX-CAT1-LB7-0103-4WD is built for 2001–2003 Duramax LB7 trucks with a 4WD drivetrain. This upgraded transmission handles up to 500 horsepower while improving durability and shift performance. The package includes a matched high-performance torque converter for efficient power transfer. It provides a reliable upgrade for towing, daily driving, and mild performance builds.
DDP 45% Over 75hp Injectors w/Nozzles (Set of 8) (DDPNLB7-75 ) for 2001- 2004 Duramax LB7
The DDP LB7 75HP injector set DDPNLB7-75 is designed for 2001–2004 Duramax LB7 engines. These injectors increase fuel delivery by 45 percent and can support approximately 75 horsepower gains with proper tuning. Each injector includes precision-matched nozzles to maintain consistent fuel atomization. This balanced set of eight injectors improves throttle response and overall engine performance.
South Bend Organic Street Dual Disc Clutch Kit (SDDMAXZ-ORG) for Duramax LB7 / LLY
The South Bend SDDMAXZ-ORG Organic Street Dual Disc Clutch is designed for GM 6.6L Duramax LB7 and LLY trucks. This Stage 2 clutch kit uses organic friction discs for smooth engagement and reliable street performance. Dual clutch discs increase torque capacity and improve heat management. The kit includes throw-out bearings and alignment tools for easier installation. Ideal for daily driving, towing, and moderate performance builds.
PPEI Engine Tuning (PP-LB7-ET) For 2001-2004 Duramax LB7
The PPEI Engine Tuning PP-LB7-ET is designed for 2001–2004 Duramax LB7 engines. It improves horsepower, torque, and throttle response. This tuning also refines fuel delivery and transmission shifting. It supports better drivability and efficiency in daily and towing use. PPEI tuning provides a reliable performance upgrade for LB7 trucks.
Dynomite Diesel 10-20HP Economy Series Injector Set (DDPNLB7-ECO) for 2001-2004 Duramax LB7
The Dynomite Diesel 10-20HP Economy Series Injector Set DDPNLB7-ECO fits 2001-2004 Duramax LB7 engines. It delivers a 10 to 20 horsepower increase over stock. Improved fuel atomization enhances throttle response and efficiency. Flow-matched injectors ensure consistent performance across all cylinders. This set provides a reliable upgrade for daily driving and light towing.
Fleece Performance GM Front TufShafts (FPE-TUFSHAFTS) for 2001-2010 Duramax LB7 / LLY / LBZ / LMM
The Fleece Performance GM Front TufShafts (FPE-TUFSHAFTS) are heavy-duty, chromoly steel axle shaft upgrades for 2001–2010 GM Duramax trucks with LB7, LLY, LBZ, or LMM engines. Designed for high performance and durability under extreme conditions, they offer a direct-fit replacement for stock shafts without modifications. Ideal for towing, racing, and off-road use, these shafts enhance reliability and prevent common front axle failures.
Fleece Replacement Transmission Medium Line (FPE-TL-LB7-LMM-MED-SER) for 2001-2010 Duramax LB7 / LLY / LBZ / LMM
The Fleece Replacement Transmission Medium Line (FPE-TL-LB7-LMM-MED-SER) is a durable aftermarket upgrade for 2001–2010 GM Duramax diesel trucks (LB7, LLY, LBZ, LMM). It replaces the factory transmission cooler line with a high-quality, heat- and abrasion-resistant option that improves reliability and performance. Designed for both stock and modified vehicles, it helps prevent common transmission cooling failures and offers an easy, direct-fit installation.
Fleece Replacement Transmission Long Line (FPE-TL-LB7-LMM-LONG-SER) for 2001-2010 Duramax LB7/ LLY / LBZ / LMM
The Fleece Replacement Transmission Long Line (FPE-TL-LB7-LMM-LONG-SER) is an upgraded transmission line kit for 2001–2010 GM Duramax diesel trucks with LB7, LLY, LBZ, or LMM engines. It replaces factory hard lines with durable braided stainless steel hoses to improve fluid flow, reduce leaks, and enhance reliability. Designed for both stock and performance applications, the kit includes all necessary fittings for easy installation and provides better transmission cooling and longevity.
Fleece Replacement Transmission Short Line (FPE-TL-LB7-LLY-SHORT-SER) for 2001-2005 Duramax LB7 / LLY
The Fleece Replacement Transmission Short Line (FPE-TL-LB7-LLY-SHORT-SER) is an aftermarket upgrade for 2001–2005 GM Duramax trucks with LB7 or LLY engines. It replaces factory transmission lines that are prone to cracking or leaking, offering enhanced durability and performance. Made from high-quality materials to handle high temperatures and pressures, it ensures a secure, leak-free connection between the transmission and cooler. Ideal for modified or performance applications, it improves reliability and simplifies installation, making it a popular choice among Duramax owners.
Fleece 1″ T4 Pedestal Spacer (FPE-T4PED-SPACER1.0) for Duramax equipped w/T4 Turbos
The Fleece 1″ T4 Pedestal Spacer (FPE-T4PED-SPACER1.0) is a high-quality component designed for Duramax engines with T4 turbochargers. It raises the turbo pedestal by one inch to allow clearance for larger or custom turbos, ensuring proper alignment and secure mounting. Ideal for performance upgrades and custom builds, it enhances compatibility and flexibility in turbo system modifications.
Fleece 7″ Straight Cut Hood Stack Cover (FPE-HSC-7-S) for 7″ Exhaust Pipe
The Fleece 7″ Straight Cut Hood Stack Cover (FPE-HSC-7-S) is a durable protective cover designed for 7-inch exhaust stacks on diesel trucks. It shields the stack from debris, moisture, and weather when not in use, helping to extend the life of exhaust components. With a sleek, straight-cut design, it ensures a secure fit and professional appearance, making it ideal for storage or harsh conditions.
Fleece 6″ Straight Cut Hood Stack Cover (FPE-HSC-6-S) for 6″ Exhaust Pipe
The Fleece 6″ Straight Cut Hood Stack Cover (FPE-HSC-6-S) is a durable, heavy-duty cover designed to protect 6-inch exhaust hood stacks on performance diesel trucks. It prevents debris and moisture from entering the exhaust when not in use and features a straight-cut design for a secure fit and professional look. Built to withstand harsh weather, it is a reliable accessory for maintaining exhaust system integrity.
Fleece 5″ Straight Cut Hood Stack Cover (FPE-HSC-5-S) for 5″ Exhaust Pipe
The Fleece 5″ Straight Cut Hood Stack Cover (FPE-HSC-5-S) is a durable, high-performance exhaust accessory designed for 5-inch exhaust pipes. Featuring a sleek, straight-cut design, it protects the exhaust system from debris, moisture, and contaminants when not in use. Built to withstand high temperatures and harsh conditions, it’s ideal for performance trucks and custom builds, offering both protection and style.
Fleece 5″ 45 Degree Hood Stack Cover (FPE-HSC-5-45) for 5″ Exhaust Pipe
The Fleece 5″ 45 Degree Hood Stack Cover (FPE-HSC-5-45) is a durable, weather-resistant cover designed to protect 5-inch, 45-degree angled exhaust stacks commonly used in performance diesel trucks. It prevents debris and moisture from entering the exhaust system, helping to extend component life and maintain performance. Easy to install and remove, it offers reliable protection during downtime or transport.
Fleece 4″ Short Hood Stack Cover – Straight Cut (FPE-HSC-4-S) for 4″ Exhaust Pipe
The Fleece 4″ Short Hood Stack Cover – Straight Cut (FPE-HSC-4-S) is a durable, weather-resistant cover designed to protect 4″ straight-cut exhaust stacks from rain, snow, and debris. It helps maintain exhaust system efficiency and longevity when the vehicle is not in use. Easy to install and remove, it’s a practical accessory for truck owners.
Fleece 4″ Short Hood Stack Cover – Miter Cut (FPE-HSC-4-45) for 4″ Exhaust Pipe
The Fleece 4″ Short Hood Stack Cover – Miter Cut (FPE-HSC-4-45) is a durable, high-quality cover designed to protect 4-inch miter-cut exhaust stacks from moisture, dirt, and debris. Made from heavy-duty materials, it ensures a secure fit and helps extend the life and performance of diesel truck exhaust systems when not in use.
Fleece 18″ Rail Pressure Sensor Extension Harness (FPE-HAR-RP-EXT) for 2001-2016 Duramax LB7 / LLY / LBZ / LMM / LML& 2003-2012 Cummins 5.9L / 6.7L
The Fleece 18″ Rail Pressure Sensor Extension Harness (FPE-HAR-RP-EXT) is a plug-and-play aftermarket solution for 2001–2016 Duramax and 2003–2012 Cummins engines. It provides an 18-inch extension for easier relocation of the rail pressure sensor during custom builds or fuel system upgrades. Built to OEM specs, it ensures a secure, reliable connection without the need for wire cutting or splicing.
Fleece Multiuse Sensor Pigtail (FPE-HAR-MU-PT-5) for 2001-2022 Duramax LB7 / LLY / LBZ / LMM / LML / L5P & 1994-2022 Cummins 5.9L / 6.7L
The Fleece Multiuse Sensor Pigtail (FPE-HAR-MU-PT-5) is a durable, weatherproof wiring solution compatible with 2001–2022 Duramax and 1994–2022 Cummins diesel engines. Featuring OEM-style connectors, it serves as a reliable replacement or upgrade for various sensor connections, ideal for both repairs and custom builds.
Fleece Multiuse Sensor Pigtail No 11 (FPE-HAR-MU-PT-11) for 2001-2016 Duramax LB7 / LLY / LBZ / LMM / LML
The Fleece Multiuse Sensor Pigtail No. 11 (FPE-HAR-MU-PT-11) is a durable, OEM-style replacement wiring solution for 2001–2016 Duramax diesel engines (LB7, LLY, LBZ, LMM, LML). Designed for easy installation and reliable sensor connections, it helps maintain proper engine management. Made from automotive-grade materials, it offers long-lasting performance in tough conditions and is ideal for replacing damaged connectors or custom wiring upgrades.
Fleece Heated Seat Module Connector Pigtail (FPE-HAR-HSM-PT) for 2003-2006 Duramax LB7 / LLY / LBZ & 2011-2019 Powerstroke 6.7L
The Fleece Heated Seat Module Connector Pigtail (FPE-HAR-HSM-PT) is a durable, OEM-grade replacement wiring solution for repairing or replacing damaged heated seat module connectors in select diesel trucks, including 2003–2006 GM Duramax and 2011–2019 Ford Powerstroke models. Designed for easy installation, it ensures reliable electrical connections and long-lasting performance, restoring heated seat functionality and comfort.
Fleece Automatic Transmission 20-Pin Pigtail GM (FPE-HAR-GM-AT-20-PT) for 2001-2016 Duramax LB7 / LLY / LBZ / LML
The Fleece Performance FPE-HAR-GM-AT-20-PT is a high-quality 20-pin transmission pigtail designed for 2001–2016 GM Duramax diesel trucks (LB7, LLY, LBZ, LML). Built for durability and OEM fit, it provides a reliable fix for damaged connectors and supports transmission swaps, harness repairs, or custom builds. Its plug-and-play design ensures secure connectivity and optimal transmission performance.
Replaces discontinued GM part number 12126459 and AC Delco PT729
Fleece Oil Pressure Sensor Pigtail (FPE-HAR-DMAX-OP-0310) for 2003-2010 Duramax LB7 / LLY / LBZ / LMM
The Fleece Oil Pressure Sensor Pigtail (FPE-HAR-DMAX-OP-0310) is a durable, OEM-style replacement harness for 2003–2010 GM Duramax diesel engines (LB7, LLY, LBZ, LMM). It repairs damaged or corroded oil pressure sensor connectors, ensuring accurate pressure readings and proper engine function. Designed for a secure, weather-resistant fit, it provides a reliable and cost-effective solution for maintenance or troubleshooting.
Fleece Oil Pressure Sensor Pigtail (FPE-HAR-DMAX-OP-0102) for 2001-2002 Duramax LB7
The Fleece Oil Pressure Sensor Pigtail (FPE-HAR-DMAX-OP-0102) is a durable, OE-style replacement wiring harness for 2001–2002 GM Duramax LB7 diesel engines. Designed to ensure accurate oil pressure readings and reliable engine monitoring, it offers a plug-and-play solution for repairing damaged connectors or during engine rebuilds, helping maintain vehicle performance and reliability.
Fleece MAP BARO Sensor Pigtail (FPE-HAR-DMAX-MAP-0107) for 2001-2007 Duramax LB7 / LLY / LBZ
The Fleece MAP BARO Sensor Pigtail (FPE-HAR-DMAX-MAP-0107) is a direct-fit replacement connector for 2001–2007 GM Duramax diesel engines (LB7, LLY, LBZ). Designed to replace damaged or corroded MAP or BARO sensor connectors, it features OEM-style construction and durable wiring for reliable performance in harsh engine conditions. Ideal for maintenance, repairs, or troubleshooting.
