Dorman HD Solutions Non-Pressurized Coolant Reservoir for 1999-2007 Chevrolet GMC Isuzu 603-5603

Non-pressurized coolant reservoir for 1999-2007 Chevrolet GMC and Isuzu trucks used to replace cracked or leaking factory overflow tanks.

Built to meet the manufacturer's design intent for reliable service, this unit is constructed from quality materials engineered to withstand underhood heat and engine vibration while matching the original part's fit and function.

Key Features

• Direct replacement for original equipment non-pressurized coolant tanks
• Constructed from durable materials resistant to heat and vibration
• Engineered to match OE form, fit, and function
• Validated through testing to ensure dependable performance
• Backed by Dorman's extensive automotive aftermarket experience

Benefits

• Restores proper coolant levels and prevents overheating issues
• Eliminates leaks caused by cracked or damaged factory reservoirs
• Ensures a smooth installation with no modifications required
• Reduces the risk of repeat repairs with long-lasting materials
• Provides a cost-effective solution compared to dealer parts

Application

Ideal for owners of late 90s to mid 2000s Chevrolet, GMC, and Isuzu medium duty trucks needing a reliable fix for a broken or faded coolant overflow bottle.

Fitment Notes

• Compatible with select 1999-2007 Chevrolet models
• Compatible with select 1999-2007 GMC models
• Compatible with select 1999-2007 Isuzu models
• Verify vehicle compatibility using part number 603-5603 before purchase

Why Choose Dorman - HD Solutions?

• Dorman parts are engineered as direct-fit replacements designed to match OE form, fit, and function
• Built with quality materials and validated through testing to stand up to daily driving demands
• Offers a smart way to restore your vehicle with confidence in fit and durability

What's in the Box

• 1 PC Coolant Reservoir

Item Dimensions

• Length: 15.0 in
• Width: 5.0 in
• Height: 11.7 in
• Weight: 1.6 lbs