Order Chevrolet Trailblazer Tensioner pulley. Explore Chevrolet Trailblazer Guide pulley & Chevrolet Trailblazer Tensioner pulley price. Maintaining the idler pulleys in your Chevrolet Trailblazer is crucial for smooth engine operation and belt longevity. To extend their lifespan, ensure they are free from debris and the bearings are lubricated. Signs that indicate a need for replacement include squeaking noises or visible wear and tear. When selecting new idler pulleys, opt for ones that match your Trailblazer's specifications, considering there are different types designed for various models and engine sizes. High-quality materials like steel ensure durability, while proper installation, which might include precise torque specifications, is key to optimal performance. By choosing the right idler pulley, you invest in the long-term health of your vehicle's engine system.