Gates 90K-38103 Serpentine Belt Drive Component Kit

Accessory Belt Drive Kit for OE-Style Service

Restore the accessory belt drive system with the Gates Accessory Belt Drive Kit 90K-38103. This kit is built around the belt, tensioner, and idler pulley needed to service the serpentine drive as a complete system, helping reduce repeat repairs on high-mileage vehicles.

Compatible With 1996-2002 Chevrolet Express, GMC Savana, Chevrolet Blazer, GMC Jimmy, Chevrolet Silverado 1500, GMC Sierra 1500, Chevrolet S10, GMC Sonoma, and Oldsmobile Bravada applications listed below, this kit is a direct-fit service solution for vehicles with air conditioning and the specified alternator output.

Key Features

• Gates Accessory Belt Drive Kit, part number 90K-38103
• Includes an OE-equivalent belt, tensioner, and idler pulley
• Belt 1 outside circumference: 95.585 in. / 2428 mm
• Belt top width: 0.807 in. / 20 mm
• Belt 1 part number: K060950
• Idler pulley part number: 38001
• Tensioner assembly part number: 38103

Product Details

The Gates 90K-38103 serpentine belt drive component kit is intended to restore the front-end accessory drive by replacing the belt and the wear items that affect belt tracking and tension. Gates packages the components as a matched service kit with installation instructions and tech tips, making it easier to service the system accurately on vehicles such as the Chevrolet Express, GMC Savana, and Chevrolet Silverado 1500. This approach helps maintain proper belt operation across the accessory drive path and supports consistent performance in applications that use the listed 100A or 105A alternator configurations.

This part cross-references Dayco D60950K1 for the same application.

What It Helps Address

• Squealing or chirping from a worn serpentine belt
• Belt tracking issues caused by a weak tensioner
• Noise from a worn idler pulley
• Premature belt wear from aging accessory drive components
• Repeat front-end accessory drive service on high-mileage vehicles

Installation Notes and Tips

Verify the vehicle’s engine accessory drive configuration before installation. This kit is listed for specific 1996-2002 Chevrolet and GMC applications with air conditioning and the alternator output noted in the fitment data. Use the included installation instructions and tech tips to confirm routing, tensioner alignment, and pulley condition before final assembly.

• Fits 2001-2002 Chevrolet Express 1500, N/A; W/A.C.; W/105A. Alt.
• Fits 2001-2002 Chevrolet Express 2500, N/A; W/A.C.; W/105A. Alt.
• Fits 2001-2002 Chevrolet Express 3500, N/A; W/A.C.; W/105A. Alt.
• Fits 2002 Chevrolet G30, N/A; W/A.C.; W/105A. Alt.
• Fits 1999-2002 GMC Jimmy, N/A; W/A.C.
• Fits 2001-2002 GMC Savana 1500, N/A; W/A.C.; W/105A. Alt.
• Fits 2001-2002 GMC Savana 2500, N/A; W/A.C.; W/105A. Alt.
• Fits 2001-2002 GMC Savana 3500, N/A; W/A.C.; W/105A. Alt.
• Fits 1999-2002 GMC Sonoma, N/A; W/A.C.
• Fits 1999-2001 Chevrolet Blazer, N/A; W/A.C.
• Fits 1999-2001 Chevrolet Silverado 1500, N/A; W/A.C.
• Fits 1999-2001 GMC Sierra 1500, N/A; W/A.C.
• Fits 1999-2001 Oldsmobile Bravada, N/A; W/A.C.
• Fits 1996-2000 Chevrolet Express 1500, N/A; W/A.C.; W/100A. Alt.
• Fits 1996-2000 Chevrolet Express 2500, N/A; W/A.C.; W/100A. Alt.
• Fits 1996-2000 Chevrolet Express 3500, N/A; W/A.C.; W/100A. Alt.
• Fits 1999-2000 Chevrolet S10, N/A; W/A.C.
• Fits 1996-2000 GMC Savana 1500, N/A; W/A.C.; W/100A. Alt.
• Fits 1996-2000 GMC Savana 2500, N/A; W/A.C.; W/100A. Alt.
• Fits 1996-2000 GMC Savana 3500, N/A; W/A.C.; W/100A. Alt.

Quality Assurance

Gates designs this Accessory Belt Drive Kit as an OE-equivalent service solution for the complete serpentine drive. The matched-component approach supports accurate repair of the accessory belt system on Chevrolet Express, GMC Savana, and related GM truck and van applications.