Performance Drive Belt Tensioner Kit for GMC Yukon (2000-2002) 5.3L

Heavy-Duty Drive Belt Tensioner Kit for 2000-2002 GMC Yukon (GMT800)

What it Does: The Performance Drive Belt Tensioner Kit replaces worn factory accessory drive components on the 2000-2002 GMC Yukon to maintain correct serpentine belt tension, prevent slip under heavy electrical load, and eliminate accessory drive noise.

The Stock GMC Yukon Accessory Drive Weakness

The factory accessory drive on the GMT800 Yukon is subjected to severe heat cycling and torsional vibration. Over time, the internal damping spring within the stock tensioner assembly fatigues, leading to tensioner arm oscillation, premature belt wear, and belt slippage under heavy load from the high-output alternator. Concurrently, factory idler pulley bearings dry out, seize, or create rotational play. On the 5.3L LM7 Vortec V8, belt deflection can result in thrown belts, dead batteries, loss of power steering, and immediate water pump failure.

The Engineering Solution

This comprehensive service kit restores the accessory drive system to reliable operating standards. The heavy-duty cast tensioner assembly (38158) utilizes an engineered internal spring to maintain constant mechanical pressure across all engine speeds. Matched with a precision-ground, high-grade steel idler pulley (38001) with sealed bearings, parasitic drag and torsional harmonic transfer are drastically reduced. The package is completed with an EPDM multi-rib serpentine belt (6PK2360) formulated to withstand high ambient under-hood temperatures without cracking or glazing.

What's Included

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

Technical Specifications

Compatibility

• 2000 GMC Yukon 5.3L V8 (130 Amp Alternator Option)
• 2001 GMC Yukon 5.3L V8 (130 Amp Alternator Option)
• 2002 GMC Yukon 5.3L V8 (130 Amp Alternator Option)

Frequently Asked Questions & Fitment Warnings

Does this fit the GMT800 Yukon?

Yes, this is a direct fit for the 2000-2002 GMC Yukon equipped with the LM7 5.3L V8 engine. Does not fit models equipped with the standard 105 Amp alternator option, which requires a shorter belt length.

How do I verify if I have the 130 Amp alternator?

Check the glove box RPO code sticker for option code KG8 (130 Amp), or measure the pulley-to-pulley belt length matching the 2360mm specification before ordering.

The GMC Heavy-Duty Caliber

Full-size GM platforms rely on continuous accessory performance for heavy towing, cooling, and demanding payload cycles. Upgrading worn factory belt drive hardware ensures charging stability and belt retention when hauling high-stress loads.