Dorman 674-495 Exhaust Manifold - Left

OE-Style Left Exhaust Manifold

This Dorman exhaust manifold is precision-engineered to match the fit and function of the original part on specified vehicles. Built from cast iron with a natural finish, it is made for left-side exhaust repairs on full-size GM trucks and SUVs, including Cadillac Escalade, Chevrolet Tahoe, and GMC Yukon applications.

• Cast iron construction for durable exhaust service
• Natural finish
• Oval port shape
• No oxygen sensor port
• Includes gasket and seal components for the repair
• Mounting hardware included
• Direct replacement for the original manifold on listed vehicles

Detailed Product Overview

Dorman Part Number 674-495 is an exhaust manifold designed for left-side installation on 2014-2020 applications across Cadillac, Chevrolet, and GMC platforms. It is built to match original fit and function, with the correct port shape and a regular-grade cast iron body for dependable exhaust sealing. This part number 674-495 also cross-references OE number 12629337 for the same application.

Compatible With 2015-2020 Cadillac Escalade, left; 2015-2020 Cadillac Escalade ESV, left; 2015-2020 Chevrolet Tahoe, left; 2015-2020 GMC Yukon, left; 2015-2020 GMC Yukon XL, left; 2014-2019 Chevrolet Cheyenne, left; 2019 Chevrolet Silverado 1500 LD, left; 2019 GMC Sierra 1500 Limited, left; 2014-2018 Chevrolet Silverado 1500, left; 2014-2018 Chevrolet Silverado 2500, left; 2014-2018 GMC Sierra, left; 2014-2018 GMC Sierra 1500, left; and 2014-2015 Chevrolet Cheyenne, left, V8 378CID 6.2L (6200cc).

Common Repair Uses

• Replacing a cracked or warped left exhaust manifold
• Restoring exhaust sealing at the cylinder head
• Addressing exhaust leaks that create ticking or hissing noises
• Repairing broken manifold studs or flange sealing issues
• Correcting exhaust odor or noise from the left bank

Installation Notes and Tips

Verify vehicle year, make, model, engine configuration, and left-side placement before installation. This manifold includes the necessary gasket and downpipe hardware for the repair, and the package contents also include manifold and flange gaskets plus studs and nuts. Inspect the mating surfaces, fasteners, and adjacent exhaust components before assembly to help ensure a proper seal.

Quality Assurance

Dorman manufactures this manifold to match original equipment fit and function on the listed vehicles. The cast iron construction and included sealing components support a complete exhaust manifold replacement on the specified Cadillac, Chevrolet, and GMC applications.