Dorman 265-815 Transmission Oil Pan

Transmission Oil Pan for OE Replacement

Dorman 265-815 is a direct replacement transmission oil pan for vehicles that use an 8 mm bolt pattern. Built from steel with a black finish, it is designed to restore a damaged original pan and provide reliable, leak-free service. This transmission pan is a practical OE-style solution for a wide range of Buick, Chevrolet, Oldsmobile, Pontiac, and Cadillac applications.

• Steel construction for durability
• Black finish
• One-piece configuration
• Drain plug included for service convenience
• 20 mounting holes with 9.5 mm mounting hole diameter
• 13.5 capacity with 17.5 length and 15 width
• Part number 265-815 for direct identification

Detailed Product Information

This transmission oil pan is made to replace a damaged original equipment pan while maintaining the correct fit and service layout. The steel body measures 17.5 inches long, 15 inches wide, and 1.5 inches thick, with a maximum depth of 0.5 inch. It includes a drain plug and uses a one-piece pan and gasket configuration. Dorman 265-815 is intended for vehicles such as the Buick Century, Chevrolet Lumina, Oldsmobile 88, and Pontiac Grand Prix, among other listed applications.

This part cross-references ATP 103137 for the same application.

What It Helps Fix

• Transmission fluid leaks from a rusted, dented, or cracked pan
• Service issues caused by a damaged drain area
• Poor sealing from a warped original transmission pan
• Replacement needs after pan impact or corrosion
• Restoration of proper transmission fluid containment

Installation Notes and Tips

Verify the vehicle uses the listed 8 mm bolt application before installation. This pan does not include a gasket or mounting hardware, so the correct seal and fasteners must be sourced separately. Clean the mating surface thoroughly, inspect the transmission case for damage, and confirm drain plug thread engagement before refilling with fluid. Compatible With 1997-1998 Buick Century, 1997-1998 Chevrolet Lumina, and 1997-1998 Pontiac Grand Prix, as well as other listed Buick, Chevrolet, Oldsmobile, Pontiac, and Cadillac models.

Quality Assurance

Dorman manufactures this replacement transmission oil pan as a direct-fit service part for the listed applications. Part number 265-815 is built to match the original pan’s basic form and service function for dependable replacement use.