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02-16 GM 2500HD/2500HD 6.6L Duramax | 06-16 GM Express/Savana 6.6L Duramax | 03-09 GM Kodiak/Topkick 6.6L Duramax Dayco Automatic Belt Tensioner

Fits: 2002-2016 GM 2500HD/3500HD 6.6L Duramax LB7/LLY/LBZ/LMM/LML | 2006-2016 GM Express/Savana 6.6L Duramax LLY/LGH | 2003-2009 GM Kodiak/ Topkick C4500/C5500 6.6L Duramax LB7/LLY/LBZ/LMM

This Dayco 89259 Automatic Belt Tensioner is designed and manufactured to outperform other aftermarket belt tensioners. This Belt Tensioner is built with a flat wire spring that allows the internal tension to provide constant tension. The heavy duty cast aluminum spring case is highly resistant to rust and premature cracking to provide a long service life. This belt tensioner also comes with a Deflected Arm Plate that decreases rotational movement and extends tensioner life. 


  • Manufactured to OE Requirement
  • Deflected Arm Plate Extends Tensioner Life
  • Heavy-Duty Cast Aluminum Spring Case
  • Zinc-Coated Mounting Bolts Resist Rust

Dayco: 89259

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