ACDelco Professional Automatic Belt Tensioner and Pulley Assembly

The ACDelco Professional Automatic Belt Tensioner and Pulley Assembly is a drive belt tensioner designed to keep the serpentine or accessory drive belt at the correct tension. Correct tension helps the belt drive accessories such as the alternator, water pump, power steering pump and A/C compressor. Each assembly includes the tensioner and pulley, and is also known as an automatic tensioner or serpentine belt tensioner.

Key Features:

• Automatic tension control: Applies consistent spring-loaded pressure to the belt to help limit slippage, noise and uneven belt wear.
• Integrated pulley: The pulley is matched to the tensioner so the belt tracks smoothly and the drive system runs quietly.
• Professional-grade construction: Built for dependable, long-term service in demanding under-hood conditions.
• Quality backing: ACDelco is General Motors' parts brand, with a long history of OE-focused engineering and quality standards.

A worn tensioner can cause belt squeal, belt flutter, premature belt wear and accessory problems. It is good practice to replace the tensioner and pulley assembly when you install a new drive belt. Choose the specific part number from the options listed on this page.