ATP Parts 101376 Exhaust Manifold - Right

Right Exhaust Manifold for GM HD Applications

ATP Parts 101376 is a right-side exhaust manifold for select Chevrolet and GMC heavy-duty trucks and SUVs. It is built to restore proper exhaust routing after a cracked or warped manifold has started leaking hot exhaust gases into the engine bay.

Compatible With 2001-2003 Chevrolet Silverado 2500 HD, Silverado 3500, Avalanche 2500, Suburban 2500, and 2001-2003 GMC Sierra 2500 HD, Sierra 3500, Yukon XL 2500, right side applications.

• Direct replacement exhaust manifold for the right side
• Helps seal exhaust leaks caused by manifold cracking or warping
• Supports proper exhaust flow from the engine to the exhaust system
• OE-style fit and function for listed Chevrolet and GMC applications
• ATP Parts 101376 cross-references OE numbers 674728 and 12557286 for the same application

Why Replace a Damaged Manifold

Exhaust manifolds are exposed to high heat cycles and can deteriorate over time. When the manifold leaks, exhaust noise can increase, engine performance can suffer, and hot gases can enter the engine compartment. In severe cases, those gases can reach the passenger cabin. ATP Parts 101376 is designed to replace the damaged manifold and restore the exhaust system on the listed Chevrolet Silverado 2500 HD, Silverado 3500, Avalanche 2500, Suburban 2500, and GMC Sierra 2500 HD, Sierra 3500, Yukon XL 2500 models.

Common Problems This Part Can Address

• Exhaust leak at the manifold
• Ticking or puffing noise from the engine bay
• Warped or cracked original manifold
• Burned exhaust smell near the vehicle
• Loss of exhaust sealing at the cylinder head

Installation Notes

Verify right-side fitment before ordering and compare the existing manifold to the replacement part. Check the cylinder head sealing surface, exhaust flange condition, and related mounting points for damage before installation. On 2002 applications, this part is listed without air pump; 2003 fitments note AIR-related hardware differences in the catalog data.

Quality Assurance

ATP Parts designs exhaust manifolds to match the original part’s fit and function, helping restore proper exhaust sealing on the specified GM applications. Part number 101376 is cataloged for direct replacement use on the listed vehicles.