ACDelco 12686272 GM Original Equipment Drive Belt Tensioner Assembly

The ACDelco 12686272 is a GM Original Equipment drive belt tensioner assembly designed to maintain proper tension on your vehicle's serpentine belt system. This spring-loaded pulley assembly automatically adjusts belt tension to prevent slippage and ensure optimal performance of engine accessories including the alternator, power steering pump, air conditioning compressor, and water pump.

Key Features:

• Genuine GM Original Equipment part - the same quality installed during vehicle production
• Spring-loaded tensioner design maintains consistent belt tension throughout the life of the belt
• High-quality bearings resist dirt, salt, and environmental contaminants
• Aluminum and composite construction for durability and weight savings
• Pulley specifications: 2.79-inch outside diameter, 0.67-inch inside diameter, 1.14-inch width
• Designed, engineered, and tested to rigorous GM standards
• Direct replacement for worn or failed original tensioners

This tensioner assembly is manufactured to GM OE specifications for precise fit, form, and function. ACDelco GM Original Equipment parts are validated by General Motors and backed by their quality standards, ensuring reliable performance and longevity. Replacing a worn tensioner prevents belt squeal, reduces accessory wear, and helps avoid unexpected belt failure.