LB7 Duramax Coolant Reservoir Tank 2001-2004 - Dorman

Overview

This is a coolant reservoir / degas bottle for the Chevrolet, GMC LB7 Duramax diesel (2001-2004). Built to OEM specification and engineered as a direct-fit replacement for a professional-grade LB7 Duramax repair or service. Every order ships fast and is backed by our support team.

What It Does & How It Helps

The coolant reservoir, or degas bottle, holds the expansion volume of the cooling system and lets air separate out of the coolant. On most diesel trucks it is also pressurized, so it has to hold the system pressure its cap is rated for. Plastic reservoirs age with heat cycling and crack at the seams or the hose necks, which lets coolant weep out and air into the system. A new reservoir stops the leak and keeps the system bleeding and pressurizing correctly.

What's Included

• a coolant reservoir / degas bottle as specified
• cap, sensor or fittings where included

Fitment

Fits Chevrolet, GMC trucks equipped with the LB7 Duramax diesel engine, 2001-2004. Please confirm your engine and year before ordering to ensure correct fitment.

Common Symptoms & When to Use

Consider this LB7 Duramax part when you experience:

• coolant residue or a crack on the reservoir
• coolant level dropping with no other leak
• a sweet coolant smell after driving
• air in the cooling system or poor cab heat

Specifications

• Engine: LB7 Duramax
• Year Range: 2001-2004

Quality & Service

Fast shipping on in-stock orders. Free shipping on orders over $70. Backed by Core Diesel Parts — your source for LB7 Duramax diesel parts.