Dorman Transmission Oil Pan replacement for select GM models — stamped steel, drain plug & magnet

The Dorman 265-811 transmission oil pan is a direct-replacement steel pan for select GM vehicles that adds a service-friendly drain plug, integrated magnet, filter assembly and gasket so you can change fluid with less mess.

This replacement pan is engineered to match original equipment fit and function while making routine transmission maintenance cleaner and faster. Built from stamped steel and finished with an electrocoat (E-coat) layer, the assembly is supplied with the necessary filter and a magnetic element to capture metallic particles. Before ordering, confirm vehicle compatibility using the fitment tool and any supplemental notes that appear in the product listing.

How does the drain plug simplify transmission service?

The built-in drain plug lets you remove most transmission fluid without loosening the entire pan, reducing spills and cleanup. That means faster fluid changes and less chance of contaminating work surfaces or the surrounding undercarriage. The plug threads into the pan and is placed for accessible draining when the vehicle is raised.

• Enables controlled fluid removal before lowering the pan
• Reduces mess and disposal time during maintenance
• Saves time compared with fully removing a fluid-filled pan

What durability features protect the pan from corrosion and wear?

The pan is made from stamped steel and receives an electrocoat finish to resist corrosion from road salts, moisture and fluid exposure. The construction follows tight manufacturing tolerances to maintain a reliable sealing surface and structural strength under the vehicle. These features help the pan hold up through typical service intervals and driving conditions.

• Stamped steel body for rigidity and impact resistance
• E-coat finish for long-term corrosion protection
• Precision edges to minimize leak risk at the gasket surface

What’s included to complete the repair and save additional trips to the parts store?

This kit comes with the transmission pan, a matched filter assembly, a replacement gasket and an integrated magnet already installed in the pan. That means the common components that are replaced during a pan service are bundled together for a single purchase. Using the supplied parts ensures compatibility and eliminates the need to source separate pieces.

• Preinstalled magnet to capture metal debris
• Vehicle-matched filter assembly included
• New gasket provided for a proper seal

How do I confirm this pan fits my vehicle?

Use the product page garage tool and the Confirmed Fit indicator at the top of the listing to check compatibility for your specific year, make and model. If a blue information icon appears, hover or click to read additional fitment notes that could affect installation. Always verify the transmission code and any supplemental details to ensure proper fitment before purchase.

• Enter vehicle details in the online fitment tool
• Inspect any blue "i" notes for special fitment instructions
• Confirm transmission variant and year/model match your vehicle

Who is this for: The Dorman 265-811 transmission oil pan is intended for do-it-yourselfers and professional technicians performing transmission pan service on supported GM vehicles who want a direct-fit replacement that reduces mess and includes the filter, gasket and magnet. It is also useful for fleets and repair shops needing a reliable, complete pan assembly during routine maintenance or when replacing a damaged or leaking OE pan.