Performance Drive Belt Tensioner Kit for GMC Sierra 3500 (2001-2002) 6.0L

Heavy-Duty Accessory Drive Belt Tensioner Kit for 2001-2002 GMC Sierra 3500 (GMT800)

What it Does: The Performance Drive Belt Tensioner Kit replaces worn drive components on the 2001-2002 Sierra 3500 to maintain constant belt tension, eliminate slip, and ensure reliable accessory drive operation under heavy towing loads.

The Stock GMC Sierra 3500 Accessory Drive Weakness

Under continuous high-duty-cycle operation and engine bay heat soak, the factory mechanical tensioner on the GMT800 platform suffers from internal spring fatigue and hydraulic damping loss. On Vortec 6000 LQ4 engines paired with the high-load 130-amp alternator, torsional crank vibration accelerates bearing galling in the stock idler pulley. This causes angular misalignment, rib glazing on the serpentine belt, audible belt chirping, and charging voltage fluctuations under heavy payload or towing demands.

The Engineering Solution

This comprehensive service kit restores dynamic drive geometry using a reinforced cast-aluminum tensioner housing paired with a heavy-duty internal torsional steel spring to counter severe harmonic vibration. The included idler pulley incorporates premium double-sealed ball bearings packed with synthetic high-temperature grease to resist thermal breakdown and contaminants. Completed by a precision-molded 6-rib EPDM serpentine belt engineered to resist thermal cracking and rib elongation, this direct-replacement assembly delivers OE-level fitment and reliable accessory engagement across the entire RPM range.

What's Included

• 1 Serpentine Belt (Part # 6PK2360)
• 1 Idler Pulley (Part # 38001)
• 1 Tensioner Assembly (Part # 38158)

Technical Specifications

Compatibility

• 2001 GMC Sierra 3500 6.0L V8 (130 Amp Alternator Option)
• 2002 GMC Sierra 3500 6.0L V8 (130 Amp Alternator Option)

Frequently Asked Questions & Fitment Warnings

Does this fit the GMT800 Sierra 3500?

Yes, this is a direct fit for the 2001-2002 GMC Sierra 3500 equipped with the Vortec 6000 LQ4 engine and the 130-amp alternator option. This kit does not fit 8.1L Big Block V8 or 6.6L Duramax Diesel configurations, nor does it fit 6.0L models equipped with 105-amp or 145-amp alternator packages.

How do I verify if my truck has the 130 Amp alternator?

Check the Service Parts Identification (RPO) sticker in your glovebox for code KG8, which denotes the factory 130-amp charging option.

The GMC Heavy-Duty Caliber

Built for commercial hauling and maximum payload applications, this drive kit ensures your Sierra maintains vital water pump, power steering, and high-output charging operation without failure under continuous towing stress.