Dorman 46056 PCV Valve Tubing

Dorman 46056 PCV Valve Tubing

Dorman 46056 is a rubber PCV valve tube built to replace a worn or leaking original equipment hose in the crankcase ventilation system. It is shaped for direct service on select Chevrolet, Buick, Pontiac, and Cadillac applications, including Camaro, Corvette, Impala, Grand Prix, CTS, GTO, Allure, and LaCrosse.

Key Features

• Rubber construction helps resist cracking and brittleness from heat and age
• Slip-on attachment method for OE-style hose replacement
• U-shaped hose design for listed applications
• Inside diameters: 0.441 in and 0.343 in
• Outside diameters: 0.587 in and 0.657 in
• Direct replacement for part number 12594779

Detailed Description

This PCV tube supports proper crankcase ventilation by replacing damaged tubing that can allow vacuum leaks, rough idle, or oil vapor routing issues. Dorman 46056 is made from rubber and formed to match the U-shaped hose layout used on specific GM vehicles, including 2014-2015 Chevrolet Camaro, 2008-2013 Chevrolet Corvette, 2007-2009 Chevrolet Impala, and 2004-2007 Cadillac CTS. It also serves 2008-2009 Buick Allure and LaCrosse, 2007-2008 Pontiac Grand Prix, 2004-2006 Pontiac GTO, and select Chevrolet Monte Carlo and Corvette applications. This part number, 46056, is a practical OE-style service solution when the original hose is split, hardened, or leaking.

What It Helps Fix

• Cracked or brittle PCV hose material
• Vacuum leaks from deteriorated crankcase ventilation tubing
• Oil vapor routing problems caused by a leaking hose
• Rough idle or drivability concerns linked to PCV hose failure
• Loss of proper crankcase ventilation flow

Installation Notes and Tips

Verify hose routing, shape, and diameter before installation. This tube uses a slip-on attachment method and is listed for U-shaped hose applications, including some Corvette listings with dirty air or under-intake-manifold routing. Confirm the vehicle year, make, model, and notes match the application before service. Part number 46056 is also a useful reference when comparing against OE replacement 12594779.

Quality Assurance

Dorman manufactures this replacement PCV tube from materials selected to resist cracking and brittleness in normal engine-bay conditions. It is built as a direct-fit service part for the listed GM applications, including Chevrolet Camaro and Corvette models.