Dorman 42055 PCV Valve Grommet

Dorman 42055 PCV Valve Grommet

Dorman 42055 is a PCV valve grommet built to match the original fit and function on specified vehicles. The rubber construction and push-on attachment help deliver a secure seal for valve cover and PCV valve applications across a wide range of Chevrolet, GMC, Cadillac, Buick, Pontiac, Oldsmobile, and related GM models.

• Rubber construction for dependable sealing and flexibility
• Push-on attachment method for straightforward installation
• Inside diameter: 0.71 in.
• Outside diameter: 1.28 in.
• Thickness: 0.46 in.
• Designed to match OE fit and function on specified applications
• Part number: 42055

Application Details

This PCV valve grommet is used in PCV valve and valve cover locations on selected vehicles. It is a direct-fit replacement for many GM applications, including Fits 2002-2003 Chevrolet Silverado 1500, N/A; Fits 1999-2001 Chevrolet Silverado 1500, N/A; and Fits 1976-1983 Chevrolet Camaro, N/A. It also applies to vehicles such as Cadillac Escalade, GMC Sierra 1500, and Pontiac Firebird in listed configurations. Part number 42055 is also referenced by 420553 and 9776721 for the same application.

Key Features

• Matches the original grommet’s fit and function on specified vehicles
• Rubber material supports a tight seal at the PCV valve or valve cover opening
• Push-on design simplifies replacement of worn or hardened grommets
• Built for reliable performance in emission control service
• Fits a broad range of GM cars, trucks, and SUVs from 1973-2003

What It Helps Fix

• Cracked or hardened PCV valve grommets
• Vacuum leaks at the valve cover or PCV valve opening
• Loose PCV valve retention
• Oil vapor seepage around the grommet area
• Idle or drivability issues caused by a poor PCV seal

Installation Notes and Tips

Inspect the valve cover opening and PCV valve before installation. Clean away oil residue and debris so the rubber grommet seats fully. Confirm the inside diameter and outside diameter match the original part, especially on valve cover applications listed as 1 in. diameter. For best results, install on the correct vehicle and engine configuration shown in the fitment data.

Quality Assurance

Dorman engineers this PCV valve grommet to match OE fit and function and to provide durable, reliable service on specified applications. It is designed as a direct replacement for the original grommet used on compatible Chevrolet Silverado, GMC Sierra, and Cadillac Escalade applications, as well as many other listed GM vehicles.