2004.5-2005 GM 2500HD/3500HD 6.6L LL Duramax Exterior Upgrades

2004.5-2005 GM 2500HD/3500HD 6.6L LLY Duramax Bed Liners

Bed Liners

2004.5-2005 GM 2500HD/3500HD 6.6L LLY Duramax Bed Racks

Bed Racks

2004.5-2005 GM 2500HD/3500HD 6.6L LLY Duramax Bull Bars

Bull Bars

2004.5-2005 GM 2500HD/3500HD 6.6L LL Duramax Bumpers

Bumpers

2004.5-2005 GM 2500HD/3500HD 6.6L LLY Duramax Fender Flares

Fender Flares

2004.5-2005 GM 2500HD/3500HD 6.6L LLY Duramax Mud Flaps

Mud Flaps

2004.5-2005 GM 2500HD/3500HD 6.6L LLY Duramax Roof Racks

Roof Racks

2004.5-2005 GM 2500HD/3500HD 6.6L LLY Duramax Side Steps

Side Steps

2004.5-2005 GM 2500HD/3500HD 6.6L LL Duramax Tonneau Covers

Tonneau Covers

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AMP Research 19-04280-STA Replacement Controller Module | Universal
AMP Research 19-04280-STA Replacement Controller Module | Universal
AMP Research 19-04280-STA Replacement Controller Module | Universal
AMP Research 19-04280-STA Replacement Controller Module | Universal
AMP Research 19-04280-STA Replacement Controller Module | Universal

AMP Research

AMP Research 19-04280-STA Replacement Controller Module | Universal

SKU: AMP19-04280-STA
$99.99
Merchant 10008 Wheel Well Liner Clips | 2001-2007 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Merchant 10008 Wheel Well Liner Clips | 2001-2007 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Merchant Automotive

Merchant 10008 Wheel Well Liner Clips | 2001-2007 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: MAT10008
$4.92
AMP Research 76404-01A OBD-II Splitter | Universal
AMP Research 76404-01A OBD-II Splitter | Universal
AMP Research 76404-01A OBD-II Splitter | Universal
AMP Research 76404-01A OBD-II Splitter | Universal

AMP Research

AMP Research 76404-01A OBD-II Splitter | Universal

SKU: AMP76404-01A
$119.99
S&B 84-1001 Mud Flaps for 2.5" inch Hitch Receivers | Universal
S&B 84-1001 Mud Flaps for 2.5" inch Hitch Receivers | Universal
S&B 84-1001 Mud Flaps for 2.5" inch Hitch Receivers | Universal
S&B 84-1001 Mud Flaps for 2.5" inch Hitch Receivers | Universal
S&B 84-1001 Mud Flaps for 2.5" inch Hitch Receivers | Universal

S&B Filters

S&B 84-1001 Mud Flaps for 2.5" inch Hitch Receivers | Universal

SKU: SAB84-1001
$349
AMP Research 75131-01A Light Kit | AMP Steps with New Style Controller | Universal
AMP Research 75131-01A Light Kit | AMP Steps with New Style Controller | Universal
AMP Research 75131-01A Light Kit | AMP Steps with New Style Controller | Universal
AMP Research 75131-01A Light Kit | AMP Steps with New Style Controller | Universal

AMP Research

AMP Research 75131-01A Light Kit | AMP Steps with New Style Controller | Universal

SKU: AMP75131-01A
$169.99
Bestop 76303-35 Supertop 6.5" inch Top | 1999-2017 GM Silverado/Sierra 2500HD/3500HD
Bestop 76303-35 Supertop 6.5" inch Top | 1999-2017 GM Silverado/Sierra 2500HD/3500HD

Bestop

Bestop 76303-35 Supertop 6.5" inch Top | 1999-2017 GM Silverado/Sierra 2500HD/3500HD

SKU: BST76303-35
$999.99
ADD C9988320001NA Overland Rack | Universal
ADD C9988320001NA Overland Rack | Universal
ADD C9988320001NA Overland Rack | Universal
ADD C9988320001NA Overland Rack | Universal
ADD C9988320001NA Overland Rack | Universal

Addictive Desert Designs

ADD C9988320001NA Overland Rack | Universal

SKU: ADDC9988320001NA
$2,998.98
AMP Research 74608-01A BedXtender HD Quick Mount Bracket Kit | Universal
AMP Research 74608-01A BedXtender HD Quick Mount Bracket Kit | Universal
AMP Research 74608-01A BedXtender HD Quick Mount Bracket Kit | Universal

AMP Research

AMP Research 74608-01A BedXtender HD Quick Mount Bracket Kit | Universal

SKU: AMP74608-01A
$29.99
Rugged Liner WWC99 Wheel Well Rear Inner Liner | 1999-2006 GM 2500HD/3500HD Silverado/Sierra
Rugged Liner WWC99 Wheel Well Rear Inner Liner | 1999-2006 GM 2500HD/3500HD Silverado/Sierra

Rugged Liner

Rugged Liner WWC99 Wheel Well Rear Inner Liner | 1999-2006 GM 2500HD/3500HD Silverado/Sierra

SKU: RUGWWC99
$139
AMP Research 75400-01A Bed Step 2 | 1999-2014 GM Silverado/Sierra 1500/2500HD/3500HD
AMP Research 75400-01A Bed Step 2 | 1999-2014 GM Silverado/Sierra 1500/2500HD/3500HD
AMP Research 75400-01A Bed Step 2 | 1999-2014 GM Silverado/Sierra 1500/2500HD/3500HD

AMP Research

AMP Research 75400-01A Bed Step 2 | 1999-2014 GM Silverado/Sierra 1500/2500HD/3500HD

SKU: AMP75400-01A
$329.99
BedRug BRZSPRAYON Spray-In Adhesion Kit for BedRug Liners & Mats | Universal
BedRug BRZSPRAYON Spray-In Adhesion Kit for BedRug Liners & Mats | Universal
BedRug BRZSPRAYON Spray-In Adhesion Kit for BedRug Liners & Mats | Universal
BedRug BRZSPRAYON Spray-In Adhesion Kit for BedRug Liners & Mats | Universal

BedRug

BedRug BRZSPRAYON Spray-In Adhesion Kit for BedRug Liners & Mats | Universal

SKU: BEDBRZSPRAYON
$19.95
T-Rex 51200 Upper Class Mesh Grille | 2003-2006 Sierra 1500/2500HD/3500HD
T-Rex 51200 Upper Class Mesh Grille | 2003-2006 Sierra 1500/2500HD/3500HD

T-Rex Grilles

T-Rex 51200 Upper Class Mesh Grille | 2003-2006 Sierra 1500/2500HD/3500HD

SKU: TRX51200
$589.50
T-Rex 51101 Upper Class Mesh Grille | 2003-2005 Silverado 1500/2500HD/3500HD
T-Rex 51101 Upper Class Mesh Grille | 2003-2005 Silverado 1500/2500HD/3500HD
T-Rex 51101 Upper Class Mesh Grille | 2003-2005 Silverado 1500/2500HD/3500HD
T-Rex 51101 Upper Class Mesh Grille | 2003-2005 Silverado 1500/2500HD/3500HD
T-Rex 51101 Upper Class Mesh Grille | 2003-2005 Silverado 1500/2500HD/3500HD

T-Rex Grilles

T-Rex 51101 Upper Class Mesh Grille | 2003-2005 Silverado 1500/2500HD/3500HD

SKU: TRX51101
$889.50
T-Rex 25202 Bolt-On Bumper/Air Dam Billet Grille Insert | 2003-2006 Sierra 1500/2500HD/3500HD
T-Rex 25202 Bolt-On Bumper/Air Dam Billet Grille Insert | 2003-2006 Sierra 1500/2500HD/3500HD

T-Rex Grilles

T-Rex 25202 Bolt-On Bumper/Air Dam Billet Grille Insert | 2003-2006 Sierra 1500/2500HD/3500HD

SKU: TRX25202
$126.50
Westin 40-1245 Sportsman Black Grille Guard | 2003-2007 Silverado 2500HD/3500HD
Westin 40-1245 Sportsman Black Grille Guard | 2003-2007 Silverado 2500HD/3500HD
Westin 40-1245 Sportsman Black Grille Guard | 2003-2007 Silverado 2500HD/3500HD
Westin 40-1245 Sportsman Black Grille Guard | 2003-2007 Silverado 2500HD/3500HD

Westin

Westin 40-1245 Sportsman Black Grille Guard | 2003-2007 Silverado 2500HD/3500HD

SKU: WES40-1245
$1,132.32
Westin 32-1245 Ultimate Black Bull Bar | 1999-2007 GM Silverado/Sierra 1500/2500HD/3500HD
Westin 32-1245 Ultimate Black Bull Bar | 1999-2007 GM Silverado/Sierra 1500/2500HD/3500HD
Westin 32-1245 Ultimate Black Bull Bar | 1999-2007 GM Silverado/Sierra 1500/2500HD/3500HD
Westin 32-1245 Ultimate Black Bull Bar | 1999-2007 GM Silverado/Sierra 1500/2500HD/3500HD

Westin

Westin 32-1245 Ultimate Black Bull Bar | 1999-2007 GM Silverado/Sierra 1500/2500HD/3500HD

SKU: WES32-1245
$594.44
Westin 31-5240 E-Series Polished Bull Bar | 1999-2007 GM Silverado/Sierra 1500/2500HD
Westin 31-5240 E-Series Polished Bull Bar | 1999-2007 GM Silverado/Sierra 1500/2500HD
Westin 31-5240 E-Series Polished Bull Bar | 1999-2007 GM Silverado/Sierra 1500/2500HD
Westin 31-5240 E-Series Polished Bull Bar | 1999-2007 GM Silverado/Sierra 1500/2500HD

Westin

Westin 31-5240 E-Series Polished Bull Bar | 1999-2007 GM Silverado/Sierra 1500/2500HD

SKU: WES31-5240
$642.64
BedRug TW2X4MAT TrackMat 2ft x 4ft Folding Utility Mat | Universal
BedRug TW2X4MAT TrackMat 2ft x 4ft Folding Utility Mat | Universal
BedRug TW2X4MAT TrackMat 2ft x 4ft Folding Utility Mat | Universal
BedRug TW2X4MAT TrackMat 2ft x 4ft Folding Utility Mat | Universal

BedRug

BedRug TW2X4MAT TrackMat 2ft x 4ft Folding Utility Mat | Universal

SKU: BEDTW2X4MAT
$34.63
BAK Industries 80102 Revolver X4s Hard Rolling Cover | 1988-2013 GM Silverado/Sierra 1500/2500HD/3500HD Long Bed
BAK Industries 80102 Revolver X4s Hard Rolling Cover | 1988-2013 GM Silverado/Sierra 1500/2500HD/3500HD Long Bed
BAK Industries 80102 Revolver X4s Hard Rolling Cover | 1988-2013 GM Silverado/Sierra 1500/2500HD/3500HD Long Bed
BAK Industries 80102 Revolver X4s Hard Rolling Cover | 1988-2013 GM Silverado/Sierra 1500/2500HD/3500HD Long Bed
BAK Industries 80102 Revolver X4s Hard Rolling Cover | 1988-2013 GM Silverado/Sierra 1500/2500HD/3500HD Long Bed

BAK Industries

BAK Industries 80102 Revolver X4s Hard Rolling Cover | 1988-2013 GM Silverado/Sierra 1500/2500HD/3500HD Long Bed

SKU: BAK80102
$1,449.99
BAK Industries 80101 Revolver X4s Hard Rolling Cover | 1988-2013 GM Silverado/Sierra 2500HD/3500HD Short Bed
BAK Industries 80101 Revolver X4s Hard Rolling Cover | 1988-2013 GM Silverado/Sierra 2500HD/3500HD Short Bed
BAK Industries 80101 Revolver X4s Hard Rolling Cover | 1988-2013 GM Silverado/Sierra 2500HD/3500HD Short Bed
BAK Industries 80101 Revolver X4s Hard Rolling Cover | 1988-2013 GM Silverado/Sierra 2500HD/3500HD Short Bed
BAK Industries 80101 Revolver X4s Hard Rolling Cover | 1988-2013 GM Silverado/Sierra 2500HD/3500HD Short Bed

BAK Industries

BAK Industries 80101 Revolver X4s Hard Rolling Cover | 1988-2013 GM Silverado/Sierra 2500HD/3500HD Short Bed

SKU: BAK80101
$1,379.99
S&B 84-1000 Mud Flaps for 2.0" inch Hitch Receivers | Universal
S&B 84-1000 Mud Flaps for 2.0" inch Hitch Receivers | Universal
S&B 84-1000 Mud Flaps for 2.0" inch Hitch Receivers | Universal
S&B 84-1000 Mud Flaps for 2.0" inch Hitch Receivers | Universal
S&B 84-1000 Mud Flaps for 2.0" inch Hitch Receivers | Universal

S&B Filters

S&B 84-1000 Mud Flaps for 2.0" inch Hitch Receivers | Universal

SKU: SAB84-1000
$349
S&B 84-1002 Mud Flaps for 3.0" inch Hitch Receivers | Universal
S&B 84-1002 Mud Flaps for 3.0" inch Hitch Receivers | Universal
S&B 84-1002 Mud Flaps for 3.0" inch Hitch Receivers | Universal
S&B 84-1002 Mud Flaps for 3.0" inch Hitch Receivers | Universal
S&B 84-1002 Mud Flaps for 3.0" inch Hitch Receivers | Universal

S&B Filters

S&B 84-1002 Mud Flaps for 3.0" inch Hitch Receivers | Universal

SKU: SAB84-1002
$349
Kleinn HK7 Pro Blaster Triple Train Horn Kit with 150PSI 100% Duty Onboard Air System | Universal
Kleinn HK7 Pro Blaster Triple Train Horn Kit with 150PSI 100% Duty Onboard Air System | Universal
Kleinn HK7 Pro Blaster Triple Train Horn Kit with 150PSI 100% Duty Onboard Air System | Universal

Kleinn Automotive Air Horns

Kleinn HK7 Pro Blaster Triple Train Horn Kit with 150PSI 100% Duty Onboard Air System | Universal

SKU: KLNHK7
$839.95
Rhino Rack JA2525 Vortex 2500HD Black 2-Bar Roof Rack | 1999-2014 GM Silverado/Sierra 2500HD/3500HD
Rhino Rack JA2525 Vortex 2500HD Black 2-Bar Roof Rack | 1999-2014 GM Silverado/Sierra 2500HD/3500HD
Rhino Rack JA2525 Vortex 2500HD Black 2-Bar Roof Rack | 1999-2014 GM Silverado/Sierra 2500HD/3500HD

Rhino Rack

Rhino Rack JA2525 Vortex 2500HD Black 2-Bar Roof Rack | 1999-2014 GM Silverado/Sierra 2500HD/3500HD

SKU: RRUJA2525
$604.96

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If you want to transform your 2004.5-2005 GM 6.6L Duramax LLY build into a truck you can truly call your own, choose from our vast selection of exterior parts and upgrades available here at Alligator Performance. The right combination of exterior upgrades on your Sierra/Silverado will turn heads each time you get behind the wheel. Whether you're looking for some bolt-on fender flares for a quick and easy upgrade, or a premium roof rack for improved cargo carrying capacity, we have it all. Better yet, you can shop and drive with confidence knowing we only work with the most trusted and reliable names in the business. Once you've finished outfitting your exterior, head over and check out our selection of GM 2500/3500 Wheels & Tires to complete your custom build! GM Duramax Fitments: 2004, 2005 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>2004.5-2005 6.6L LLY
Side Steps
Fender Flares
Grilles
Mud Flaps
Roof Racks

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