Sierra 3500 HD

The Titanium Signature Series diesel fuel Systems are the superior fuel System and filtration System, in the diesel industry. This is because here at FASS Fuel Systems we focus on perfecting our Systems and how they are engineered, taking the extra steps...

Our FASS Signature Series Adjustable Diesel Fuel Systems are designed to be the most versatile high-performance fuel System on the market that allows for adjustable fuel pressures to meet the demand of high-performance GM Duramax 6.6L applications...

Our FASS Signature Series Adjustable Diesel Fuel Pumps are designed to be the most versatile high performance fuel pump on the market that allows for adjustable fuel pressures to meet the demand of high performance GM Duramax 6.6L applications...

A FASS Fuel System will be a very beneficial upgrade for your GM Duramax diesel engine, this is because your Duramax doesn't come with a factory System like other diesels. This requires your CP3/CP4 injection System to pull your fuel under a vacuum,...

Whether you're tackling tough terrain or smooth city streets, Rough Country's Nitrogen-charged V2 Monotube Shock Absorber leads the way, delivering impeccable ride quality and performance mile after mile. Rough Country's Monotube V2 Shocks feature an...

New for 2018 - ReadyLIFT now offers our popular 2011-UP GM 2500/3500 HD forged torsion key leveling kit with our all-new heavy-duty fabricated steel upper control arms. Our time-tested torsion key leveling kit is the strongest, safest leveling key system...

Has the rear of your vehicle started to sag, or are you looking to add a bit of lift height? Whatever the case maybe we have you covered at Rough Country. Upgrade your rear suspension with Rough Country's vehicle-specific block and u-bolt kit!Rough...

A FASS Fuel Systems can be a beneficial upgrade for your GM Duramax LML diesel engine, this is because your Duramax doesn't come with a factory System like other diesels. This requires your CP4 injection System to pull your fuel under a vacuum, adding...

Our FASS Signature Series Adjustable Diesel Fuel Systems are designed to be the most versatile high-performance fuel System on the market that allows for adjustable fuel pressures to meet the demand of high-performance GM Duramax 6.6L applications...

Our FASS Signature Series Adjustable Diesel Fuel Systems are designed to be the most versatile high-performance fuel System on the market that allows for adjustable fuel pressures to meet the demand of high-performance GM Duramax 6.6L applications...

Rough Country's 3.5in No-Cut Kit offers easy installation and aggressive good looks at an incredible value. Take your truck to new heights with this excellent option for GM HD Models. This kit features a set of high-quality, tubular Upper Control Arms...

Improved Ground Clearance and Ride Quality. Take your workhorse to the next level with Rough Country's 3.5" Knuckle Lift kit. Rough Country's 3.5" Knuckle Kit provides an improved ground clearance and is designed for on or off-road driving. This...