Gates 38172 Accessory Drive Belt Tensioner Assembly - Fan, Alternator or Power Steering and Air Conditioning

Overview of Gates DriveAlign Premium OE Automatic Belt Tensioner

The Gates DriveAlign Premium OE Automatic Belt Tensioner 38172 is engineered for reliable accessory drive belt system performance. Designed specifically for select Chevrolet, GMC, and Hummer models, this tensioner assembly ensures proper belt tension and alignment for V-ribbed belts.

• Thermoplastic construction for durability and heat resistance
• Single flanged pulley with 6 V-ribbed grooves
• Outside diameter of 70 mm (2.76 in) and width of 24 mm (0.94 in)
• Bearing bore inside diameter of 17 mm (0.67 in)
• OE exact fit and performance rating
• Compatible with V-ribbed belt types
• Includes one mounting hole for secure installation

DriveAlign Premium OE Automatic Belt Tensioner Product Line

The DriveAlign Premium OE Automatic Belt Tensioner line by Gates focuses on delivering original equipment (OE) exact replacement parts for accessory drive belt systems. This product line emphasizes precise fitment and reliable tensioning to maintain optimal belt alignment and reduce premature wear. The 38172 tensioner assembly is part of this line, providing a thermoplastic pulley and bearing design that meets OE specifications for Chevrolet Express, GMC Sierra, and Hummer H1 vehicles.

Detailed Product Description

This accessory drive belt tensioner assembly features a thermoplastic pulley with a flanged design to securely guide the V-ribbed belt across six grooves. The pulley measures 70 mm in outside diameter and 24 mm in width, accommodating the belt profile for consistent contact and tension. The bearing bore inside diameter is 17 mm, ensuring smooth rotation and reduced friction. The single mounting hole allows for straightforward installation, maintaining proper alignment within the accessory drive system. The tensioner is rated as OE exact, matching factory specifications for fit and function on compatible Chevrolet Express 2500/3500, GMC Sierra 2500 HD/3500 HD, and Hummer H1 models.

Common Applications and Issues Addressed

• Maintains correct tension on V-ribbed accessory drive belts
• Prevents belt slippage and misalignment
• Reduces noise caused by worn or loose belts
• Helps avoid premature belt and pulley wear
• Supports proper operation of engine accessories such as alternator and power steering

Installation Notes and Tips

Ensure the vehicle is off and cooled before beginning installation. Verify compatibility with your Chevrolet Express, GMC Sierra, or Hummer H1 model using the part number 38172. Remove the old tensioner carefully, noting belt routing. Install the Gates DriveAlign Premium OE Automatic Belt Tensioner securely using the single mounting hole, and confirm the V-ribbed belt is properly seated in all six grooves. Double-check belt tension and alignment before starting the engine.

Quality Assurance and Warranty

The Gates DriveAlign Premium OE Automatic Belt Tensioner 38172 is manufactured to meet original equipment standards, ensuring reliable performance and durability. This part undergoes rigorous quality control to maintain consistent tension and alignment. While specific warranty details are not provided here, Gates products typically come with manufacturer-backed warranties covering defects in materials and workmanship.