Dorman 264-644 Engine Oil Pan

OE Replacement Oil Pan for GM V6 Applications

Dorman 264-644 is an aluminum engine oil pan engineered to match the original equipment pan on specific Buick and Pontiac applications. It is built for direct replacement use on 2000-2005 Buick LeSabre, 2000-2005 Buick Park Avenue, and 2000-2005 Pontiac Bonneville models with the listed fitment.

• Aluminum construction for OE-style fit and finish
• Oil level sensor port included
• Drain plug included
• Windage tray included
• Center sump, wet sump design
• 21 mounting holes for application-specific installation
• Drain thread size: 12
• Part number: 264-644

Detailed Product Overview

This Dorman engine oil pan is precision-engineered as a replacement for the original pan on select Buick LeSabre, Buick Park Avenue, and Pontiac Bonneville vehicles. The aluminum body measures 18 inches long, 9.1 inches wide, and 5.9 inches deep, with a 9.75 capacity and a center sump layout. It also includes an oil level sensor port and a windage tray, while the drain plug is already included for service convenience. Cross-reference part numbers include 12587389 and Spectra Premium GMP73A for the same application.

Common Problems This Part Can Address

• Oil leaking from a cracked, corroded, or damaged oil pan
• Improper sealing at the pan rail or drain area
• Oil level sensor port damage on the original pan
• Service issues caused by a missing or worn drain plug
• Replacement needs after impact damage to the lower engine area

Installation Notes and Tips

Before installation, verify the vehicle application and compare the mounting hole count, sump location, and sensor port layout to the original pan. A new gasket or seal is not included, so the sealing surface should be cleaned thoroughly and the correct sealing components selected for the vehicle. Confirm drain thread size and inspect the mating surfaces for damage before filling with oil.

Quality Assurance

Dorman designs this oil pan to match original equipment specifications for the listed vehicles, supporting a direct-fit replacement on 2000-2005 Buick LeSabre, 2000-2005 Buick Park Avenue, and 2000-2005 Pontiac Bonneville applications. Part number 264-644 is built to OE-style dimensions and features for consistent service replacement.