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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ARP 400-7531 12pt Valve Cover Bolt Kit | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7
ARP 400-7531 12pt Valve Cover Bolt Kit | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7

ARP

ARP 400-7531 12pt Valve Cover Bolt Kit | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7

SKU: ARP400-7531
$121.95
$232.61
ARP 100-7531 12pt Valve Cover Bolt Kit | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7
ARP 100-7531 12pt Valve Cover Bolt Kit | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7

ARP

ARP 100-7531 12pt Valve Cover Bolt Kit | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7

SKU: ARP100-7531
$83.41
$159.10
PPE 518001000 Weld-On Billet Radiator Neck | Universal
PPE 518001000 Weld-On Billet Radiator Neck | Universal
PPE 518001000 Weld-On Billet Radiator Neck | Universal

PPE

PPE 518001000 Weld-On Billet Radiator Neck | Universal

SKU: PPE518001000
$22.49
PPE 314030212 Oil Cooler Gasket Kit | 2003-2007 Ford F250/F350 6.0L Powerstroke
PPE 314030212 Oil Cooler Gasket Kit | 2003-2007 Ford F250/F350 6.0L Powerstroke

PPE

PPE 314030212 Oil Cooler Gasket Kit | 2003-2007 Ford F250/F350 6.0L Powerstroke

SKU: PPE314030212
$35.99
PPE 149000124 Heat/Sound Insulator Firewall - Gold | 1999-2007 GM Silverado/Sierra
PPE 149000124 Heat/Sound Insulator Firewall - Gold | 1999-2007 GM Silverado/Sierra
PPE 149000124 Heat/Sound Insulator Firewall - Gold | 1999-2007 GM Silverado/Sierra
PPE 149000124 Heat/Sound Insulator Firewall - Gold | 1999-2007 GM Silverado/Sierra

PPE

PPE 149000124 Heat/Sound Insulator Firewall - Gold | 1999-2007 GM Silverado/Sierra

SKU: PPE149000124
$269.99
PPE 128059160 Neodymium Magnet - Ring Style | 2001-2019 Allison 1000
PPE 128059160 Neodymium Magnet - Ring Style | 2001-2019 Allison 1000
PPE 128059160 Neodymium Magnet - Ring Style | 2001-2019 Allison 1000
PPE 128059160 Neodymium Magnet - Ring Style | 2001-2019 Allison 1000

PPE

PPE 128059160 Neodymium Magnet - Ring Style | 2001-2019 Allison 1000

SKU: PPE128059160
$13.49
PPE 119030100 Raw 304 Stainless Steel Coolant Tube (Pump to oil cooler) | 2001-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 119030100 Raw 304 Stainless Steel Coolant Tube (Pump to oil cooler) | 2001-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 119030100 Raw 304 Stainless Steel Coolant Tube (Pump to oil cooler) | 2001-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 119030100 Raw 304 Stainless Steel Coolant Tube (Pump to oil cooler) | 2001-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 119030100 Raw 304 Stainless Steel Coolant Tube (Pump to oil cooler) | 2001-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 119030100 Raw 304 Stainless Steel Coolant Tube (Pump to oil cooler) | 2001-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 119030100 Raw 304 Stainless Steel Coolant Tube (Pump to oil cooler) | 2001-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE119030100
$197.99
$219.99
PPE 118026110 Stage 1 Performance Camshaft - Alt Fire | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 118026110 Stage 1 Performance Camshaft - Alt Fire | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 118026110 Stage 1 Performance Camshaft - Alt Fire | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 118026110 Stage 1 Performance Camshaft - Alt Fire | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 118026110 Stage 1 Performance Camshaft - Alt Fire | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE118026110
$629.99
PPE 118021430 Valve Cover Kit with out Pillars - Polished | 2004-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 118021430 Valve Cover Kit with out Pillars - Polished | 2004-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 118021430 Valve Cover Kit with out Pillars - Polished | 2004-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE118021430
$287.99
PPE 118021423 Valve Cover Kit with out Pillars - Gold | 2004-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 118021423 Valve Cover Kit with out Pillars - Gold | 2004-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 118021423 Valve Cover Kit with out Pillars - Gold | 2004-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE118021423
$287.99
PPE 118021400 Valve Cover Kit - No Pillars | 2004-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 118021400 Valve Cover Kit - No Pillars | 2004-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 118021400 Valve Cover Kit - No Pillars | 2004-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 118021400 Valve Cover Kit - No Pillars | 2004-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE118021400
$269.99
PPE 114000551 Oil Filter Adapter Threaded 13/16 inch - 16 UNF | 2001-2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 114000551 Oil Filter Adapter Threaded 13/16 inch - 16 UNF | 2001-2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 114000551 Oil Filter Adapter Threaded 13/16 inch - 16 UNF | 2001-2019 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE114000551
$8.99
PPE 113061094 Idler Pulley 3 inch OD OEM Size | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 113061094 Idler Pulley 3 inch OD OEM Size | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 113061094 Idler Pulley 3 inch OD OEM Size | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE113061094
$35.99
PPE 110090050 Valve Springs, Retainers, Keepers Complete Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 110090050 Valve Springs, Retainers, Keepers Complete Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 110090050 Valve Springs, Retainers, Keepers Complete Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 110090050 Valve Springs, Retainers, Keepers Complete Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE110090050
$539.99
PPE 110090080 Valve & Spring Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 110090080 Valve & Spring Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 110090080 Valve & Spring Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 110090080 Valve & Spring Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE110090080
$809.99
Gator Fasteners RBK66 Heavy Duty Rod Bolt Kit | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Gator Fasteners RBK66 Heavy Duty Rod Bolt Kit | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Gator Fasteners RBK66 Heavy Duty Rod Bolt Kit | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Gator Fasteners RBK66 Heavy Duty Rod Bolt Kit | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Gator Fasteners RBK66 Heavy Duty Rod Bolt Kit | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Gator Fasteners

Gator Fasteners RBK66 Heavy Duty Rod Bolt Kit | 2001-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: GTFRBK66
$209.99
Fleece FPE-HAR-DMAX-OP-0310 Oil Pressure Sensor Pigtail | 2003-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Fleece FPE-HAR-DMAX-OP-0310 Oil Pressure Sensor Pigtail | 2003-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Fleece FPE-HAR-DMAX-OP-0310 Oil Pressure Sensor Pigtail | 2003-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Fleece FPE-HAR-DMAX-OP-0310 Oil Pressure Sensor Pigtail | 2003-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Fleece Performance Products

Fleece FPE-HAR-DMAX-OP-0310 Oil Pressure Sensor Pigtail | 2003-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: FLCFPE-HAR-DMAX-OP-0310
$21.99
Edge 98609 EAS Power Switch w/Starter Kit | Universal
Edge 98609 EAS Power Switch w/Starter Kit | Universal

Edge Products

Edge 98609 EAS Power Switch w/Starter Kit | Universal

SKU: EDG98609
$210.95
Choate Engineering CEP66BIOP Break In Oil Package 15w40 | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Choate Engineering CEP66BIOP Break In Oil Package 15w40 | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Choate Engineering

Choate Engineering CEP66BIOP Break In Oil Package 15w40 | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: CHTCEP66BIOP
$180
BD Diesel 1081160 Turbo Cool Down Timer Kit v2.0 | 1994-1995 Ram 2500/3500 & 94-18 Ford Powerstroke & 01-14 GM 6.6L Duramax
BD Diesel 1081160 Turbo Cool Down Timer Kit v2.0 | 1994-1995 Ram 2500/3500 & 94-18 Ford Powerstroke & 01-14 GM 6.6L Duramax

BD Diesel

BD Diesel 1081160 Turbo Cool Down Timer Kit v2.0 | 1994-1995 Ram 2500/3500 & 94-18 Ford Powerstroke & 01-14 GM 6.6L Duramax

SKU: BDD1081160
$244.95
ARP 900-0400 4.040 Tapered Ring Compressor | 1989-2007 Dodge RAM 2500/3500 5.9L Cummins
ARP 900-0400 4.040 Tapered Ring Compressor | 1989-2007 Dodge RAM 2500/3500 5.9L Cummins

ARP

ARP 900-0400 4.040 Tapered Ring Compressor | 1989-2007 Dodge RAM 2500/3500 5.9L Cummins

SKU: ARP900-0400
$97.13
aFe 77-44002 Power Scorcher HD Tuning Module | 1999-2011 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
aFe 77-44002 Power Scorcher HD Tuning Module | 1999-2011 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
aFe 77-44002 Power Scorcher HD Tuning Module | 1999-2011 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
aFe 77-44002 Power Scorcher HD Tuning Module | 1999-2011 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
aFe 77-44002 Power Scorcher HD Tuning Module | 1999-2011 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

AFE Power

aFe 77-44002 Power Scorcher HD Tuning Module | 1999-2011 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: AFE77-44002
$473.75
PPE 119023100 Green Upper & Lower Coolant Hose Kit | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 119023100 Green Upper & Lower Coolant Hose Kit | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 119023100 Green Upper & Lower Coolant Hose Kit | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE119023100
$269.99
PPE 118034000 Main Stud Kit | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 118034000 Main Stud Kit | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 118034000 Main Stud Kit | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 118034000 Main Stud Kit | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 118034000 Main Stud Kit | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE118034000
$229.49

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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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