Gates 39242 Accessory Drive Belt Tensioner Assembly - Fan or Serpentine

Overview of Gates DriveAlign Premium OE Automatic Belt Tensioner

The Gates DriveAlign Premium OE Automatic Belt Tensioner (Part Number 39242) is engineered for reliable performance in heavy-duty applications. Designed specifically for Chevrolet and GMC trucks and vans, this tensioner assembly ensures proper tension on V-ribbed accessory drive belts for optimal engine operation.

• Constructed from durable steel for long-lasting strength
• Features a single flanged pulley with a 2.76 inch (70 mm) outside diameter
• Equipped with a V-ribbed grooved contact surface and 6 grooves for secure belt engagement
• Includes a bearing bore inside diameter of 0.67 inch (17 mm) for smooth rotation
• Width measures 0.93 inch (23.5 mm) to fit OEM specifications
• Designed with one mounting hole for straightforward installation

Detailed Product Description and Specifications

This accessory drive belt tensioner assembly is part of the Gates DriveAlign Premium OE Automatic Belt Tensioner line, which focuses on delivering OE improved quality and fitment. The steel construction provides durability under demanding conditions, while the flanged pulley design helps maintain belt alignment and reduces slippage. The V-ribbed grooved pulley with six grooves matches the V-ribbed belt type used in Chevrolet Express 2500, Express 3500, GMC Savana 2500, Savana 3500, Sierra 2500 HD, Sierra 3500 HD, Silverado 2500 HD, and Silverado 3500 HD models. The precise bearing bore diameter ensures smooth pulley rotation, contributing to consistent belt tension and reduced wear.

Compatible Vehicles and Applications

This Gates DriveAlign Premium OE Automatic Belt Tensioner (Part Number 39242) is compatible with the following Chevrolet and GMC models:

• Chevrolet Express 2500 and 3500
• GMC Savana 2500 and 3500
• Chevrolet Sierra 2500 HD and 3500 HD
• GMC Sierra 2500 HD and 3500 HD
• Chevrolet Silverado 2500 HD and 3500 HD

Common Issues Addressed by This Belt Tensioner

• Eliminates belt slippage caused by improper tension
• Prevents premature belt wear and damage
• Reduces noise from loose or misaligned belts
• Maintains consistent accessory drive system performance
• Helps avoid engine overheating due to accessory belt failure

Installation Notes and Tips

When installing the Gates DriveAlign Premium OE Automatic Belt Tensioner 39242, ensure the mounting surface is clean and free of debris. Use the single mounting hole to secure the tensioner firmly in place. Verify that the V-ribbed belt is properly seated in all six grooves of the pulley. It is recommended to inspect the belt for wear and replace it if necessary during installation. Proper alignment and tension adjustment are critical for optimal performance and longevity.

Quality Assurance and Warranty

The Gates DriveAlign Premium OE Automatic Belt Tensioner is manufactured to meet or exceed original equipment standards. The OE improved rating indicates enhanced durability and fit compared to standard replacements. Gates provides quality assurance backed by rigorous testing to ensure reliable operation in Chevrolet and GMC heavy-duty vehicles. Warranty details should be confirmed with the product documentation or authorized distributor.