Prolong the life of your engine by replacing Sierra underdrive pulleys before they have a chance to fail. Your truck's engine isn't just for enabling your pickup to drive around. It does much more than move the wheels of your Sierra down the road. It also lends power to your AC compressor, your alternator, your cooling fan and a whole bunch of other systems on the pickup. All these different systems run at different rates, and that's why the engine has a series of underdrive pulleys. Internal combustion makes the pistons move very rapidly, creating the motion you need to get your car moving. That rapid piston motion is much too fast to power the likes of your alternator and AC compressor though. In order to get the necessary power from the engine underdrive pulleys are used along with a serpentine belt. This configuration spins the other devices at much slower rates for you so that they aren't taking up more power from your truck's drivetrain than necessary. These pulleys are worked hard over time and will wear out. We offer a range of Sierra underdrive pulleys as replacement parts to keep your engine running strong. With so many different truck engine parts to worry about as you drive down the road, it's good to have a source of those parts as pieces wear out. At American Trucks we offer some of the highest quality replacement parts and upgrades as well. You can even get a kit to install Sierra superchargers on your pickup that will make use of a pulley and belt to power up your engine even more. You have a lot of ways that you can improve your pickup truck, and we offer many of them through replacement parts all sized to fit your truck exactly.
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