SBP Aluminum Coolant Expansion Tank 99-07 Chevrolet Silverado GMC Sierra

Upgrade your cooling system with the Straightboost® Performance Aluminum Coolant Expansion Tank, designed to replace the weak OEM plastic tank found on 1999–2007 Chevrolet Silverado and GMC Sierra models. Built for both turbocharged and naturally aspirated setups, this tank ensures proper clearance, improved cooling reliability, and far greater durability compared to factory plastic units. This tank may also fit other GM vehicles using the same style expansion tank (please contact us to confirm compatibility). For customers with custom setups, we can manufacture tanks with different fittings or relocated ports—just reach out to discuss your needs. Features: Direct replacement for 1999–2007 Chevrolet Silverado & GMC Sierra Compatible with turbo and non-turbo applications Works with OEM coolant hoses Will not fit with OEM airbox No coolant level sensor port Specifications: Brand: Straightboost® Performance Material: High-grade Aluminum Finish: Natural Aluminum (optional powder-coated finish available) Capacity: 4.25 Liters / 1.12 US Gallons (recommended fill: 65%) Construction: Fully TIG Welded for strength and longevity Billet Aluminum Radiator Cap Options: 16 PSI (OEM replacement) 28 PSI & 36 PSI (for high-performance applications) Available in Raw Aluminum or Anodized Black Proudly Made in the USA Additional Notes: Light surface scratches or small imperfections may be present due to the manufacturing process. In Stock and Ready to Ship!