2011-2016 GM 2500HD/3500HD 6.6L LM Duramax Engine & Performance

2011-2016 6.6L Silverado & Sierra 2500HD/3500HD

2011-2016 GM 2500HD/3500HD 6.6L LML Duramax Crate Engines

Crate Engines

2011-2016 GM 2500HD/3500HD 6.6L LML Duramax Gaskets, Gasket Kits & Bearings

Gaskets

2011-2016 GM 2500HD/3500HD 6.6L LML Duramax Glow Plugs

Glow Plugs

2011-2016 GM 2500HD/3500HD 6.6L LML Duramax Head Studs & Main Studs

Head Studs & Main Studs

2011-2016 GM 2500HD/3500HD 6.6L LML Duramax Heads & Valve Train

Heads & Valve Train

2011-2016 GM 2500HD/3500HD 6.6L LML Duramax Motor Mounts

Motor Mounts

2011-2016 GM 2500HD/3500HD 6.6L LML Duramax Oil Pans

Oil Pans

2011-2016 GM 2500HD/3500HD 6.6L LML Duramax Radiators & Cooling Upgrades

Radiators & Cooling Upgrades

2011-2016 GM 2500HD/3500HD 6.6L LML Duramax Rebuild Kits & Internal Parts

Rebuild Kits & Internal Parts

2011-2016 GM 2500HD/3500HD 6.6L LML Duramax Rods, Pistons, Cams & More

Rods/Pistons/Cams & More

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Tuner DT1150010109049 49 State Legal FIVE Tune Pack Only for EFI Live Spade | 2014 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Tuner DT1150010109049 49 State Legal FIVE Tune Pack Only for EFI Live Spade | 2014 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Duramax Tuner

Tuner DT1150010109049 49 State Legal FIVE Tune Pack Only for EFI Live Spade | 2014 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: DMTDT1150010109049
$550
Tuner DT1150010109029 49 State Legal FIVE Tune Pack Only for EFI Live Spade | 2012 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Tuner DT1150010109029 49 State Legal FIVE Tune Pack Only for EFI Live Spade | 2012 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Duramax Tuner

Tuner DT1150010109029 49 State Legal FIVE Tune Pack Only for EFI Live Spade | 2012 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: DMTDT1150010109029
$550
Tuner DT1150010109019 49 State Legal FIVE Tune Pack Only for EFI Live Spade | 2011 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Tuner DT1150010109019 49 State Legal FIVE Tune Pack Only for EFI Live Spade | 2011 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Duramax Tuner

Tuner DT1150010109019 49 State Legal FIVE Tune Pack Only for EFI Live Spade | 2011 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: DMTDT1150010109019
$550
Tuner DT8150010007060 Optimized Stock Tune Only for EFI Live Spade | 2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Tuner DT8150010007060 Optimized Stock Tune Only for EFI Live Spade | 2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Duramax Tuner

Tuner DT8150010007060 Optimized Stock Tune Only for EFI Live Spade | 2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: DMTDT8150010007060
$300
Tuner DT8150010007050 Optimized Stock Tune Only for EFI Live Spade | 2015 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Tuner DT8150010007050 Optimized Stock Tune Only for EFI Live Spade | 2015 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Duramax Tuner

Tuner DT8150010007050 Optimized Stock Tune Only for EFI Live Spade | 2015 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: DMTDT8150010007050
$300
Tuner DT8150010007040 Optimized Stock Tune Only for EFI Live Spade | 2014 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Tuner DT8150010007040 Optimized Stock Tune Only for EFI Live Spade | 2014 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Duramax Tuner

Tuner DT8150010007040 Optimized Stock Tune Only for EFI Live Spade | 2014 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: DMTDT8150010007040
$300
Tuner DT8150010007030 Optimized Stock Tune Only for EFI Live Spade | 2013 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Tuner DT8150010007030 Optimized Stock Tune Only for EFI Live Spade | 2013 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Duramax Tuner

Tuner DT8150010007030 Optimized Stock Tune Only for EFI Live Spade | 2013 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: DMTDT8150010007030
$300
Tuner DT8150010007020 Optimized Stock Tune Only for EFI Live Spade | 2012 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Tuner DT8150010007020 Optimized Stock Tune Only for EFI Live Spade | 2012 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Duramax Tuner

Tuner DT8150010007020 Optimized Stock Tune Only for EFI Live Spade | 2012 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: DMTDT8150010007020
$300
Tuner DT8150010007010 Optimized Stock Tune Only for EFI Live Spade | 2011 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Tuner DT8150010007010 Optimized Stock Tune Only for EFI Live Spade | 2011 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Duramax Tuner

Tuner DT8150010007010 Optimized Stock Tune Only for EFI Live Spade | 2011 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: DMTDT8150010007010
$300
Tuner DT8150010006060 Heavy Tow Tune Only for EFI Live Spade | 2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Tuner DT8150010006060 Heavy Tow Tune Only for EFI Live Spade | 2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Duramax Tuner

Tuner DT8150010006060 Heavy Tow Tune Only for EFI Live Spade | 2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: DMTDT8150010006060
$300
Tuner DT8150010006040 Heavy Tow Tune Only for EFI Live Spade | 2014 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Tuner DT8150010006040 Heavy Tow Tune Only for EFI Live Spade | 2014 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Duramax Tuner

Tuner DT8150010006040 Heavy Tow Tune Only for EFI Live Spade | 2014 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: DMTDT8150010006040
$300
Tuner DT8150010006050 Heavy Tow Tune Only for EFI Live Spade | 2015 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Tuner DT8150010006050 Heavy Tow Tune Only for EFI Live Spade | 2015 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Duramax Tuner

Tuner DT8150010006050 Heavy Tow Tune Only for EFI Live Spade | 2015 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: DMTDT8150010006050
$300
Tuner DT8150010006030 Heavy Tow Tune Only for EFI Live Spade | 2013 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Tuner DT8150010006030 Heavy Tow Tune Only for EFI Live Spade | 2013 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Duramax Tuner

Tuner DT8150010006030 Heavy Tow Tune Only for EFI Live Spade | 2013 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: DMTDT8150010006030
$300
Tuner DT8150010006020 Heavy Tow Tune Only for EFI Live Spade | 2012 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Tuner DT8150010006020 Heavy Tow Tune Only for EFI Live Spade | 2012 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Duramax Tuner

Tuner DT8150010006020 Heavy Tow Tune Only for EFI Live Spade | 2012 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: DMTDT8150010006020
$300
Tuner DT8150010006010 Heavy Tow Tune Only for EFI Live Spade | 2011 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Tuner DT8150010006010 Heavy Tow Tune Only for EFI Live Spade | 2011 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Duramax Tuner

Tuner DT8150010006010 Heavy Tow Tune Only for EFI Live Spade | 2011 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: DMTDT8150010006010
$300
Tuner DT8150010005060 Light Tow Tune Only for EFI Live Spade | 2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Tuner DT8150010005060 Light Tow Tune Only for EFI Live Spade | 2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Duramax Tuner

Tuner DT8150010005060 Light Tow Tune Only for EFI Live Spade | 2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: DMTDT8150010005060
$300
Tuner DT8150010005050 Light Tow Tune Only for EFI Live Spade | 2015 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Tuner DT8150010005050 Light Tow Tune Only for EFI Live Spade | 2015 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Duramax Tuner

Tuner DT8150010005050 Light Tow Tune Only for EFI Live Spade | 2015 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: DMTDT8150010005050
$300
Tuner DT8150010005040 Light Tow Tune Only for EFI Live Spade | 2014 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Tuner DT8150010005040 Light Tow Tune Only for EFI Live Spade | 2014 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Duramax Tuner

Tuner DT8150010005040 Light Tow Tune Only for EFI Live Spade | 2014 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: DMTDT8150010005040
$300
Tuner DT8150010005030 Light Tow Tune Only for EFI Live Spade | 2013 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Tuner DT8150010005030 Light Tow Tune Only for EFI Live Spade | 2013 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Duramax Tuner

Tuner DT8150010005030 Light Tow Tune Only for EFI Live Spade | 2013 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: DMTDT8150010005030
$300
Tuner DT8150010005020 Light Tow Tune Only for EFI Live Spade | 2012 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Tuner DT8150010005020 Light Tow Tune Only for EFI Live Spade | 2012 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Duramax Tuner

Tuner DT8150010005020 Light Tow Tune Only for EFI Live Spade | 2012 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: DMTDT8150010005020
$300
Tuner DT8150010005010 Light Tow Tune Only for EFI Live Spade | 2011 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Tuner DT8150010005010 Light Tow Tune Only for EFI Live Spade | 2011 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Duramax Tuner

Tuner DT8150010005010 Light Tow Tune Only for EFI Live Spade | 2011 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: DMTDT8150010005010
$300
Tuner DT8150010004060 Street Tune Only for EFI Live Spade | 2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Tuner DT8150010004060 Street Tune Only for EFI Live Spade | 2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Duramax Tuner

Tuner DT8150010004060 Street Tune Only for EFI Live Spade | 2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: DMTDT8150010004060
$300
Tuner DT8150010004050 Street Tune Only for EFI Live Spade | 2015 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Tuner DT8150010004050 Street Tune Only for EFI Live Spade | 2015 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Duramax Tuner

Tuner DT8150010004050 Street Tune Only for EFI Live Spade | 2015 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: DMTDT8150010004050
$300
Tuner DT8150010004040 Street Tune Only for EFI Live Spade | 2014 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
Tuner DT8150010004040 Street Tune Only for EFI Live Spade | 2014 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Duramax Tuner

Tuner DT8150010004040 Street Tune Only for EFI Live Spade | 2014 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

SKU: DMTDT8150010004040
$300

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2011-2016 6.6L Silverado & Sierra 2500HD/3500HD

Power Lift Shop All

The 2011-2016 GM 6.6L Duramax LML's already comes equipped with tons of horsepower and torque off the factory line, but additional power and performance has never hurt any truck. Here at Alligator Performance, we offer a ton of engine parts and upgrades that are designed specifically to give your 6.6L Duramax engine improved throttle response, power and performance, taking your GM 2500/3500 truck to the next level in every circumstance. Check out our 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 help promote component longevity so you can enjoy a 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 2011-2016 GM 6.6L Duramax LML Transmission Upgrades to compliment the increase in power you're throwing down! GM Duramax Fitments: 2011, 2012, 2013, 2014, 2015, 2016 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>2011-2016 6.6L LML
Tuners & Monitors
Cooling Upgrades
Head Studs & Main Studs
Rods, Pistons & Cams
Heads & Valve Train

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