Dorman 265-587 Transmission Oil Pan

Dorman 265-587 Transmission Oil Pan

Dorman 265-587 is a direct replacement transmission oil pan for select heavy-duty GM trucks. Built from aluminum with a silver finish, it is designed to restore a damaged original pan and support leak-free transmission service on 2020-2024 Chevrolet Silverado 2500 HD, Silverado 3500 HD, GMC Sierra 2500 HD, and Sierra 3500 HD applications.

Key Features

• Direct replacement transmission oil pan for OE-style fitment
• Aluminum construction with a one-piece configuration
• Silver finish for a clean OE-style appearance
• Drain plug included for service convenience
• Mounting hardware included
• Performance grade design
• 16 mounting holes and 12 mm drain thread diameter
• Fits 2020-2024 Chevrolet Silverado 2500 HD and Silverado 3500 HD
• Fits 2020-2024 GMC Sierra 2500 HD and Sierra 3500 HD

Detailed Description

This Dorman transmission oil pan is engineered as a replacement for a damaged original equipment pan, with dimensions and mounting features intended to match the factory application. The aluminum construction helps provide durable service, while the one-piece design supports a secure seal when installed with the correct gasket or seal. Dorman 265-587 is listed for 2020-2024 Chevrolet Silverado 2500 HD, Silverado 3500 HD, GMC Sierra 2500 HD, and Sierra 3500 HD models, making it a direct-fit option for heavy-duty truck transmission repair. This part cross-references GM OE numbers 24286058 and 24291905 for the same application.

What It Helps Fix

• Cracked or dented transmission pan housing
• Transmission fluid leaks from a damaged pan
• Service issues caused by a missing or damaged drain plug
• Corrosion or wear on the original pan surface
• Factory pan replacement after transmission service damage

Installation Notes and Tips

Verify transmission application before installation and compare the pan shape, mounting hole count, and drain thread size to the original part. This pan does not include a dipstick port and does not include a gasket or seal, so the correct sealing component should be selected separately. Clean the mating surface thoroughly before installation and torque fasteners evenly to help maintain a leak-free seal. Dorman 265-587 is intended for the listed Chevrolet Silverado 2500 HD, Silverado 3500 HD, GMC Sierra 2500 HD, and Sierra 3500 HD fitments.

Quality Assurance

Made from quality materials and built for reliable service, this replacement transmission oil pan is designed to meet the needs of heavy-duty truck owners seeking an OE-style repair solution for the listed GM applications.