Direct-fit radiator engineered for the 3.8L V6 in these LeSabre and Bonneville models. Built for OEM cooling performance and designed to bolt into factory mounting points without modification. Primed and ready for installation.
Direct OEM fitment - Eliminates guesswork; mounts at factory points with no drilling or adapter brackets needed.
Full-core cooling capacity - Designed to handle the thermal load of the 3.8L V6 under normal and highway driving conditions.
Primed and sealed - Ships ready to install; no stripping or prep required before bolting in.
Specs
Hard panel construction with sealed internal passages
OEM-equivalent core configuration for 3.8L V6 engines
Factory mounting tabs and inlet/outlet port locations
Whats Included
Radiator assembly
Frequently Asked Questions
Do I need to flush or prep the cooling system before installing this?
Yes — drain the old coolant completely and flush the system with distilled water to remove sediment and debris. This ensures the new radiator seats properly and prevents blockages. Let the system dry, then install and refill with fresh coolant per your owner's manual specification.
Will this radiator work with my factory hoses and thermostat housing?
The inlet and outlet ports are positioned at factory locations, so existing hoses will align without modification. Your current thermostat housing, water pump, and hose fittings remain unchanged. If hoses are original and stiff, consider replacing them at the same time for reliability.
What if I need to return this after opening it?
Contact ModSupply directly with your order number and reason for return within the return window. Radiators must be unused and sealed to qualify for return. Once installed and filled with coolant, return is not available due to contamination risk.
* Rates from 0–36% APR. Payment options through Affirm are subject to an eligibility check and are provided by these lending partners: affirm.com/lenders. Options depend on your purchase amount, and a down payment may be required. CA residents: Loans by Affirm Loan Services, LLC are made or arranged pursuant to a California Finance Lenders Law license. For licenses and disclosures, see affirm.com/licenses. For example, a $800 purchase could be split into 12 monthly payments of $72.21 at 15% APR or 4 interest free payments of $200 every 2 weeks.
**Rates from 0%-36% APR. Payment options through Shop Pay Installments, are subject to an eligibility check and are provided by these lending partners: affirm.com/lenders. Options depend on your purchase amount, and a down payment may be required. State notices to consumers https://www.affirm.com/licenses.
