2011-2016 Chevrolet Silverado 2500/3500 GMC Sierra 2500/3500 6.6L Diesel Radiator
SHIPPING - RETURNS - WARRANTY - CANCELLATION POLICY
*** Market Conditions after 2020 have changed the landscape of automotive parts. Although we try to stock 1000's of items in our multiple warehouse and use multiple distribution channels, having back-orders are unavoidable in today's market. If you are in need of a product quickly, we suggest email, message, or call us for availability so that we may explore your options.
Email: Sales@Speedzoneweb.com
Call: 407-846-8430
Text: 407-749-6314
Frequently Asked Questions
6.6L Diesel Radiator
Heavy-duty cooling core engineered for sustained diesel operation and towing cycles. Built to handle the thermal demands of 6.6L diesel engines in full-load conditions. Direct replacement construction ensures OEM fitment and performance without modification.
Key Features
- Full-core design — maximizes surface area for efficient heat dissipation under load
- OEM-equivalent construction — direct bolt-in replacement, no fabrication required
- Diesel-rated thermal capacity — handles sustained high-temperature operation and towing duty cycles
Specs
- Complete radiator assembly, ready to install
Whats Included
- Radiator core assembly only
Frequently Asked Questions
Will this radiator work with my factory fan shroud and hoses?
Yes — this is a direct OEM replacement. Your existing fan, hoses, and mounting hardware bolt up without modification. Drain your coolant, unbolt the old unit, and install the new one using the same fastener points.
Do I need to flush the system before installing this?
Absolutely. Run a coolant flush to remove sediment and debris from the old radiator and lines. Any contaminants left behind will clog the new core and tank. Use the cooling system capacity specified in your service manual and recommended coolant type for your year.
What if my radiator leaks or fails after I install it?
Contact our support team with photos of the failure and your order number. We handle defect claims directly — no runaround. Warranty coverage is subject to proper installation and coolant maintenance.
Our History
For 26 years Speedzone Performance LLC has been providing aftermarket car parts to Central Floridians and 1000's of customers online. What makes us different than all the other places online? We have 3 actual brick and mortar locations where were serve customers daily and find new ways to provide support and assistance to the automotive community at large. From our in house SPDZ1 Brand, to our constantly growing in stock inventory, we strive to make our customer service and ease of purchase stand out from the rest! We are also one of the largest automotive part financing providers anywhere in the United States, and continue to provide more options for our customers every year. We love what we do, and it shows in every product we sell and every new customer who becomes a part of our Speedzone Family.