Dorman 674-522HS Exhaust Manifold Heat Shield - Left

Exhaust Manifold Heat Shield for GM V8 Applications

Dorman 674-522HS is a direct replacement exhaust manifold heat shield for the left side of select Chevrolet, GMC, Cadillac, and Hummer vehicles. It is dimensionally verified to match the original shield and built from carbon steel for a precise OE-style fit on the exhaust manifold.

Use this replacement when the original shield is loose, damaged, or missing on a compatible Chevrolet Silverado 1500, GMC Sierra 1500, or Cadillac Escalade application. Dorman 674-522HS restores the factory heat barrier without replacing the manifold assembly.

Key Features

• Direct replacement exhaust manifold heat shield
• Specific fit for left-side applications
• Carbon steel construction with silver finish
• Dimensionally verified to match the original part
• Material tested for reliable service life
• One-piece configuration with five mounting holes
• Compatible with select GM trucks, SUVs, and vans from 2002-2017

Detailed Description

This Dorman exhaust manifold heat shield is engineered for vehicles that need an OE-style replacement on the left side. It is designed for fitment across a wide range of GM platforms, including Chevrolet Express 2500, Chevrolet Silverado 2500 HD, GMC Savana 3500, GMC Sierra 2500 HD, Cadillac Escalade, and Hummer H2 applications. The part number 674-522HS is also a direct reference for buyers searching by OE-style replacement number.

Built from carbon steel and finished in silver, this shield is shaped to match the original dimensions and mounting layout. That makes it a practical choice for restoring heat protection around the exhaust manifold on vehicles such as the Chevrolet Silverado 1500 and GMC Sierra 1500. This part cross-references 12562244 for the same application.

What It Helps Fix

• Loose or missing exhaust manifold heat shield
• Heat shielding damage from corrosion or fatigue
• Rattling caused by a failing manifold shield
• Loss of factory heat protection near the exhaust manifold
• Fitment issues from using an incorrect replacement shield

Installation Notes and Tips

Verify left-side fitment before ordering, since this shield is specific to one position. Confirm the mounting hole layout and manifold shape against the original part on your Chevrolet Express, GMC Savana, Silverado, Sierra, Tahoe, Yukon, or Escalade application. The package contents include the heat shield only; mounting hardware is not included.

For best results, inspect the manifold surface and fastener points for corrosion or damage before installation. A clean mounting area helps ensure the shield seats correctly and maintains proper clearance.

Quality Assurance

Dorman validates this heat shield for dimensional accuracy and material performance to support dependable service life. The part is built as a direct replacement for select GM exhaust manifold applications and is backed by Dorman’s OE-style replacement engineering approach.