Gates 38118 Accessory Drive Belt Tensioner Assembly - Alternator, Power Steering and Water Pump or Serpentine

Reliable Automatic Belt Tensioner for GM Vehicles

The Gates DriveAlign Premium OE Automatic Belt Tensioner 38118 is engineered to maintain optimal tension on V-ribbed accessory drive belts. Designed for a range of GM vehicles including Chevrolet Tahoe, GMC Yukon, and Cadillac Brougham, this steel tensioner assembly ensures consistent belt performance and longevity.

• Constructed from durable steel for strength and longevity
• Compatible with V-ribbed belt systems
• Single pulley design with a smooth backside contact surface
• Outside diameter of 2.99 inches (76 mm) and width of 1.2 inches (30.5 mm)
• One mounting hole for secure installation
• OE exact fit for reliable replacement

About the DriveAlign Premium OE Automatic Belt Tensioner Line

The DriveAlign Premium OE Automatic Belt Tensioner line by Gates offers precision-engineered tensioners that meet original equipment specifications. This product line focuses on delivering exact fitment and consistent belt tension to support accessory drive systems in various GM trucks and SUVs. The 38118 tensioner assembly is part of this line, providing a direct OE replacement that helps maintain proper belt alignment and reduces wear.

Product Details and Specifications

This accessory drive belt tensioner assembly features a steel construction for enhanced durability under demanding engine conditions. It includes a single pulley without flanges, designed specifically for V-ribbed belts commonly found in GM vehicles such as the Chevrolet C1500 Suburban and GMC K2500. The pulley has an outside diameter of 2.99 inches (76 mm) and a width of 1.2 inches (30.5 mm), with a bearing bore inside diameter of 0.67 inches (17 mm). The smooth backside contact surface ensures minimal belt wear and consistent tensioning performance.

Common Applications and Problem Solving

• Maintains proper tension on accessory drive belts to prevent slipping
• Reduces belt noise caused by improper tension
• Prevents premature belt wear and extends belt life
• Eliminates issues related to belt misalignment in GM trucks and SUVs
• Restores reliable operation of belt-driven accessories such as alternators and power steering pumps

Installation Notes and Tips

Ensure the vehicle is turned off and cooled before beginning installation. This tensioner assembly mounts with a single bolt, matching the original equipment mounting point. Verify belt routing before removal and installation to maintain proper alignment. Use appropriate tools to relieve belt tension safely during replacement. Confirm that the tensioner pulley rotates smoothly after installation to avoid belt slippage.

Quality Assurance and Warranty

The Gates DriveAlign Premium OE Automatic Belt Tensioner 38118 is manufactured to meet OE specifications, ensuring reliable performance and fitment. Gates provides quality assurance through rigorous testing and material standards. Please refer to Gates' official warranty policy for coverage details.