ATP Parts B-261 Transmission Filter

Transmission Oil Filter for GM HD Applications

ATP Parts B-261 is a premium replacement transmission oil filter built to keep transmission fluid clean as normal wear creates debris inside the unit. Clean fluid helps protect the valve body and other critical internal components from clogging and related drivability problems.

Compatible with 2001-2003 Chevrolet Silverado 2500 HD, 2001-2003 Chevrolet Silverado 3500, 2001-2003 GMC Sierra 2500 HD, and 2001-2003 GMC Sierra 3500, this filter is a direct service part for deep pan bottom sump filter applications. ATP Parts B-261 is a practical choice for routine transmission maintenance on heavy-duty GM trucks.

Key Features

• Transmission oil filter for automatic transmission service
• Premium Replacement line from ATP Parts
• Helps keep transmission fluid cleaner during normal operation
• Supports protection of the valve body and other internal transmission components
• Direct fit for deep pan bottom sump filter applications
• Part number B-261 for easy ordering and cross-reference

Detailed Description

ATP Parts B-261 is engineered for transmission fluid filtration in GM heavy-duty truck applications. The filter is part of ATP Parts’ Premium Replacement line, which focuses on service parts that match the needs of common maintenance repairs. By capturing wear-related debris before it circulates through the transmission, this filter helps maintain cleaner fluid and supports long-term transmission service life. This part cross-references Monroe Shocks & Struts (e.g., 18663, FK346) for the same application.

Use B-261 when servicing a 2001-2003 Chevrolet Silverado 2500 HD or Silverado 3500, or a 2001-2003 GMC Sierra 2500 HD or Sierra 3500 with the specified deep pan bottom sump filter setup. The B-261 part number is also helpful when verifying the correct transmission filter during maintenance or rebuild work.

What It Helps Address

• Dirty transmission fluid caused by normal wear debris
• Restricted fluid flow from a clogged filter
• Valve body contamination that can affect shifting performance
• Premature wear from unfiltered particles circulating in the transmission
• Costly repairs linked to neglected transmission service

Installation Notes and Tips

Confirm the transmission uses a deep pan bottom sump filter before ordering. Match the vehicle year, make, and model exactly to the listed applications for Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500, GMC Sierra 2500 HD, and GMC Sierra 3500. Replace the filter during transmission service and inspect the pan, gasket surfaces, and fluid condition before reassembly.

Quality Assurance

ATP Parts positions this filter in its Premium Replacement line for service-focused applications. Regular filter replacement supports cleaner transmission fluid and helps reduce the risk of debris-related transmission problems.