Gates 38126 Accessory Drive Belt Tensioner Assembly - Accessory Drive

OE Automatic Belt Tensioner for GM Applications

Gates DriveAlign Premium OE Automatic Belt Tensioner 38126 is built for accessory drive systems that need consistent belt tension and OE-style fit. It is a steel tensioner assembly with a smooth/backside pulley and OE Exact comparison rating for direct replacement use on select Buick, Chevrolet, Oldsmobile, and Pontiac vehicles.

Compatible with 1991-1995 Buick Park Avenue, Buick LeSabre, Buick Regal, Buick Riviera, Chevrolet Lumina APV, Chevrolet Lumina Van, Oldsmobile 88, Oldsmobile 98, Oldsmobile Delta 88, Oldsmobile Silhouette, Oldsmobile Toronado, Pontiac Bonneville, and Pontiac Trans Sport applications, this part number 38126 supports accessory drive belt service where OE fit and pulley geometry matter.

Key Features

• Gates DriveAlign Premium OE Automatic Belt Tensioner line
• Steel tensioner assembly for accessory drive belt systems
• OE Exact comparison rating for direct-fit replacement
• Single smooth/backside pulley for V-ribbed belt routing
• 8 mounting holes for OE-style mounting configuration
• Pulley dimensions: 3.23 in. outside diameter, 1.2 in. width
• Bearing bore inside diameter: 0.67 in. / 17 mm

Product Details

Gates designs DriveAlign Premium OE Automatic Belt Tensioners to match original equipment fit, form, and function. Part number 38126 is manufactured to rigid tolerances and specifications, helping maintain proper belt tension in the accessory drive system. The steel construction, smooth/backside contact surface, and V-ribbed belt compatibility make it a direct replacement choice for vehicles that rely on stable belt tracking and consistent tension control.

This part cross-references Dayco 89249 for the same application.

Common Problems This Part Can Address

• Belt squeal caused by weak or inconsistent tension
• Accessory drive belt flutter or vibration
• Uneven belt tracking on the pulley surface
• Noise from a worn tensioner bearing or pulley
• Loss of belt tension that can affect accessory operation

Installation Notes and Tips

Verify belt routing, pulley alignment, and mounting-hole pattern before installation. Inspect the accessory drive belt, idler pulleys, and adjacent components for wear while servicing the tensioner. Confirm the replacement matches the OE-style application for your Buick LeSabre, Buick Regal, Chevrolet Lumina APV, or Pontiac Trans Sport before final assembly.

Quality Assurance

Gates backs the DriveAlign Premium OE Automatic Belt Tensioner line with OE-focused engineering and manufacturing controls. Part number 38126 is produced to rigid tolerances to support OE fit, form, and function in the specified GM applications.