ACDelco Accessory Drive Belt Tensioner Assembly with Pulley

The ACDelco accessory drive belt tensioner assembly with pulley (also called a serpentine belt tensioner or drive belt tensioner) keeps the correct tension on the serpentine belt. That helps the alternator, power steering pump, air conditioning compressor, and water pump run reliably. ACDelco is General Motors' original equipment parts brand, and these tensioners are built to meet demanding quality standards.

Key Features:

• Complete assembly: The tensioner comes with its pulley as a single unit, which makes installation easier.
• Consistent belt tension: A spring-loaded design holds steady pressure on the belt. This reduces slippage, squealing, and premature belt wear.
• Durable construction: The housing, spring, and pulley are made to handle heat, vibration, and constant cycling.
• Smooth operation: The pulley turns on a bearing so the belt runs quietly and the accessories turn correctly.
• Quality-focused design: ACDelco builds these parts for a dependable fit and long service life.

A worn tensioner can cause belt noise, belt flutter, accessory problems, or belt failure. Replacing the tensioner when you replace the serpentine belt helps restore proper drive system performance. Choose the specific part number for your application from the options listed on this page.