ZJTBLL Drive Belt Tensioner Pulley Assembly Kit for Chevy GMC Hummer 2009–2013 V8, Includes 2 Belts

The ZJTBLL 39083 Drive Belt Tensioner Pulley Assembly Kit is a complete replacement set that restores correct serpentine belt tension and alignment for select Chevy, GMC and Hummer V8 models from 2009–2013.

Whether you hear belt noise, notice accessory slippage, or are performing routine maintenance, this kit supplies the tensioner, idler pulley and two serpentine belts needed to return the front-end drive system to reliable operation. Built from aluminum, ABS and EPDM components, the assembly is engineered to fit V8 engines (4.8L, 5.3L, 6.0L, 6.2L) used in Silverado, Sierra, Tahoe, Yukon, Avalanche and Hummer models within the listed years.

How will this kit affect engine accessory performance?

Replacing worn tensioners and pulleys helps maintain even belt tension and correct tracking, which reduces noise and protects accessories like the alternator and A/C compressor from premature wear. A properly tensioned belt also lowers the chance of slipping under load.

• Includes tensioner and idler pulley to re-establish correct belt alignment.
• Two replacement serpentine belts sized for the specified engine setups.
• Materials selected for wear resistance and dimensional stability under heat.

What parts and part numbers are included for compatibility checks?

This kit is supplied as a multi-part replacement to match common OE numbers, making it easier to verify fitment against vehicle parts lists. Use the listed reference numbers to confirm compatibility with your specific model and engine option.

• Tensioner reference numbers include 39083, 12609719, 19193110 and several cross-references.
• Idler pulley references include 36299 and 19188226 for cross-checking.
• Serpentine belt references include 4pk902 and 6pk2370 for belt sizing guidance.

What are the materials and build highlights to expect?

The assembly uses a mix of aluminum, ABS plastic and EPDM rubber to balance strength, corrosion resistance and long-term belt grip. These materials help the components withstand engine bay temperatures and the mechanical stresses of accessory drive systems.

• Aluminum tensioner body for structural rigidity.
• ABS components where controlled flexibility and weight savings are needed.
• EPDM belts resistant to heat and deformation for consistent tensioning.

How easy is installation and what’s included in the package?

The kit is intended as a direct-replacement bundle for compatible models and contains everything required for a standard tensioner/pulley swap. Installation complexity varies by vehicle — moderate mechanical skill and basic hand tools are typically sufficient.

• Package contents: 1 drive belt tensioner, 1 idler pulley, 2 serpentine belts.
• Designed to match common OE mounting points and belt paths for listed V8 engines.
• Pre-check fit by comparing included part numbers to your vehicle's parts list.

Who is this for: Professional mechanics and DIY owners working on 2009–2013 Chevrolet Silverado 1500, Avalanche, Tahoe, GMC Sierra 1500, Yukon, and Hummer H2/H3 models with 4.8L, 5.3L, 6.0L or 6.2L V8 engines who need a complete tensioner/pulley/belt replacement kit that cross-references common OEM numbers. If you’re troubleshooting belt noise, slipping, or simply replacing old drive components during scheduled maintenance, this kit offers a practical, consolidated solution.