2001-2004 GM 2500HD/3500HD 6.6L LB Duramax Engine & Performance

2001-2004 6.6L Silverado & Sierra 2500HD/3500HD

2001-2004 GM 2500HD/3500HD 6.6L LB7 Duramax Crate Engines

Crate Engines

2001-2004 GM 2500HD/3500HD 6.6L LBZ Duramax Gaskets, Gasket Kits & Bearings

Gaskets

2001-2004 GM 2500HD/3500HD 6.6L LB7 Duramax Glow Plugs

Glow Plugs

2001-2004 GM 2500HD/3500HD 6.6L LB7 Duramax Head Studs & Main Studs

Head Studs & Main Studs

2001-2004 GM 2500HD/3500HD 6.6L LB7 Duramax Heads & Valve Train

Heads & Valve Train

2001-2004 GM 2500HD/3500HD 6.6L LB7 Duramax Motor Mounts

Motor Mounts

2001-2004 GM 2500HD/3500HD 6.6L LB7 Duramax Oil Pans

Oil Pans

2001-2004 GM 2500HD/3500HD 6.6L LB7 Duramax Radiators & Cooling Upgrades

Radiators & Cooling Upgrades

2001-2004 GM 2500HD/3500HD 6.6L LB7 Duramax Rebuild Kits & Internal Parts

Rebuild Kits & Internal Parts

2001-2004 GM 2500HD/3500HD 6.6L LB7 Duramax Rods, Pistons, Cams, & More

Rods/Pistons/Cams & More

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Wehrli 100025 Coolant Plug for Engine Cover | 2001-2016 GM 2500HD/3500HD 6.6L Duramax
Wehrli 100025 Coolant Plug for Engine Cover | 2001-2016 GM 2500HD/3500HD 6.6L Duramax
Wehrli 100025 Coolant Plug for Engine Cover | 2001-2016 GM 2500HD/3500HD 6.6L Duramax

Wehrli Custom Fab

Wehrli 100025 Coolant Plug for Engine Cover | 2001-2016 GM 2500HD/3500HD 6.6L Duramax

SKU: WCF100025
$23.28
Edge 85401-201 Evolution CTS3 50 State Legal Programmer | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Edge 85401-201 Evolution CTS3 50 State Legal Programmer | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Edge 85401-201 Evolution CTS3 50 State Legal Programmer | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Edge 85401-201 Evolution CTS3 50 State Legal Programmer | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Edge 85401-201 Evolution CTS3 50 State Legal Programmer | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Edge Products

Edge 85401-201 Evolution CTS3 50 State Legal Programmer | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: EDG85401-201
$799.95
EFI Live FS3-GM Flashscan V3 | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
EFI Live FS3-GM Flashscan V3 | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

EFI Live

EFI Live FS3-GM Flashscan V3 | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: EFIFS3-GM
$1,025
ARP 400-7533 12pt Valve Cover Bolt Kit | 2004-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
ARP 400-7533 12pt Valve Cover Bolt Kit | 2004-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

ARP

ARP 400-7533 12pt Valve Cover Bolt Kit | 2004-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: ARP400-7533
$164.12
ARP 100-7532 Hex Head Valve Cover Bolt Kit | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7
ARP 100-7532 Hex Head Valve Cover Bolt Kit | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7

ARP

ARP 100-7532 Hex Head Valve Cover Bolt Kit | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7

SKU: ARP100-7532
$74.38
$141.86
PPE 119020092 2" inch OEM Coolant Hose Drain 1/4 inch Bung | Universal
PPE 119020092 2" inch OEM Coolant Hose Drain 1/4 inch Bung | Universal
PPE 119020092 2" inch OEM Coolant Hose Drain 1/4 inch Bung | Universal

PPE

PPE 119020092 2" inch OEM Coolant Hose Drain 1/4 inch Bung | Universal

SKU: PPE119020092
$26.99
$29.99
Merchant 19210615 Engine Oil Cooler Assembly | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Merchant 19210615 Engine Oil Cooler Assembly | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Merchant 19210615 Engine Oil Cooler Assembly | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Merchant Automotive

Merchant 19210615 Engine Oil Cooler Assembly | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: MAT19210615
$799.73
Merchant 10549 Water Pump Kit with Cover | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Merchant 10549 Water Pump Kit with Cover | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Merchant Automotive

Merchant 10549 Water Pump Kit with Cover | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: MAT10549
$279.75
PPE 114052020 Black Deep Engine Oil Pan | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 114052020 Black Deep Engine Oil Pan | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 114052020 Black Deep Engine Oil Pan | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 114052020 Black Deep Engine Oil Pan | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 114052020 Black Deep Engine Oil Pan | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 114052020 Black Deep Engine Oil Pan | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 114052020 Black Deep Engine Oil Pan | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE114052020
$278.99
PPE 114003000 Billet Aluminum Engine Oil Filler Cap | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 114003000 Billet Aluminum Engine Oil Filler Cap | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 114003000 Billet Aluminum Engine Oil Filler Cap | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 114003000 Billet Aluminum Engine Oil Filler Cap | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 114003000 Billet Aluminum Engine Oil Filler Cap | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 114003000 Billet Aluminum Engine Oil Filler Cap | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE114003000
$31.49
PPE 119022100 Blue Upper & Lower Coolant Hose Kit | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 119022100 Blue Upper & Lower Coolant Hose Kit | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 119022100 Blue Upper & Lower Coolant Hose Kit | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE119022100
$269.99
Mahle MS-2218P Main Bearing Set | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Mahle MS-2218P Main Bearing Set | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Mahle

Mahle MS-2218P Main Bearing Set | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: MCIMS-2218P
$85.41
$272
Wagler C6664 Push Rods | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Wagler C6664 Push Rods | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Wagler Competition Products

Wagler C6664 Push Rods | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: WCPC6664
$400
PPE 149000105 Firewall Heat Shield/Insulator | 2001-2007 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 149000105 Firewall Heat Shield/Insulator | 2001-2007 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 149000105 Firewall Heat Shield/Insulator | 2001-2007 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE149000105
$269.99
PPE 119020010 Engine to CAB Coolant Hose | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 119020010 Engine to CAB Coolant Hose | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 119020010 Engine to CAB Coolant Hose | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE119020010
$11.69
PPE 119100100 Fan Clutch Delete Nut | 2001-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 119100100 Fan Clutch Delete Nut | 2001-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 119100100 Fan Clutch Delete Nut | 2001-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 119100100 Fan Clutch Delete Nut | 2001-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 119100100 Fan Clutch Delete Nut | 2001-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE119100100
$44.99
$49.99
PPE 114000565 Oil Filter - Micropure Extreme Performance with Torqstop Technology | 2001-2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 114000565 Oil Filter - Micropure Extreme Performance with Torqstop Technology | 2001-2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 114000565 Oil Filter - Micropure Extreme Performance with Torqstop Technology | 2001-2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 114000565 Oil Filter - Micropure Extreme Performance with Torqstop Technology | 2001-2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 114000565 Oil Filter - Micropure Extreme Performance with Torqstop Technology | 2001-2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 114000565 Oil Filter - Micropure Extreme Performance with Torqstop Technology | 2001-2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE114000565
$35.99
HP Tuners UC-0000 MPVI3 Single Credit | Universal
HP Tuners UC-0000 MPVI3 Single Credit | Universal

HP Tuners

HP Tuners UC-0000 MPVI3 Single Credit | Universal

SKU: HPTUC-0000
$47.49
Edge 98617 EAS Competition Kit | Universal
Edge 98617 EAS Competition Kit | Universal
Edge 98617 EAS Competition Kit | Universal

Edge Products

Edge 98617 EAS Competition Kit | Universal

SKU: EDG98617
$549.95
$599.95
Edge 98608 EAS Temperature Sensor | Universal
Edge 98608 EAS Temperature Sensor | Universal
Edge 98608 EAS Temperature Sensor | Universal

Edge Products

Edge 98608 EAS Temperature Sensor | Universal

SKU: EDG98608
$75.75
$79.99
Gator Fasteners HSK66 Head Stud Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Gator Fasteners HSK66 Head Stud Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Gator Fasteners HSK66 Head Stud Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Gator Fasteners HSK66 Head Stud Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Gator Fasteners HSK66 Head Stud Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Gator Fasteners

Gator Fasteners HSK66 Head Stud Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: GTFHSK66
$549.99
$595.99
ARP 230-6301 Rod Bolt Kit | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
ARP 230-6301 Rod Bolt Kit | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

ARP

ARP 230-6301 Rod Bolt Kit | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: ARP230-6301
$217.92
$415.64
Merchant 331304A Transfer Case Gasket | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Merchant 331304A Transfer Case Gasket | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Merchant Automotive

Merchant 331304A Transfer Case Gasket | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: MAT331304A
$4.92
Merchant 10000 High Performance Motor Mounts | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Merchant 10000 High Performance Motor Mounts | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Merchant 10000 High Performance Motor Mounts | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Merchant 10000 High Performance Motor Mounts | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Merchant 10000 High Performance Motor Mounts | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Merchant Automotive

Merchant 10000 High Performance Motor Mounts | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: MAT10000
$422.63

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2001-2004 6.6L Silverado & Sierra 2500HD/3500HD

Power Lift Shop All

The 6.6L Duramax LB7 under the hood of your 2001-2004 GM Sierra/Silverado 2500/3500 may be one of the best and most efficient engines out there, but even the toughest trucks have some power and performance waiting to be unleashed through various performance modifications. Here at Alligator Performance, we carry a selection of cold air intakes, tuners, fuel upgrades, and turbo upgrades to help you get the most out of your diesel engine. Many of these upgrades like the cold air intakes and fuel upgrades even help promote component longevity so you can enjoy long-lasting and consistent performance without compromise. After you've added a few engine upgrades to your custom build, be sure to check out our premium 2001-2004 GM 6.6L Duramax LLY Transmission Upgrades to compliment the increase in power you're throwing down! GM Duramax Fitments: 2001, 2002, 2003, 2004 GM 6.6L Duramax. Submodel Fitments: WT, Custom, LT, LTZ, High Country, 1LT, 2LT, Pro, SLE, SLT, AT4, Denali. Some exceptions apply, please see individual product pages for specific fitments.

GM Duramax>2001-2004 6.6L LB7
Tuners & Monitors
Cooling Upgrades
Head Studs & Main Studs
Rods, Pistons & Cams
Heads & Valve Train

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