High-performance aluminum radiator engineered as a direct-fit replacement for 2000–2005 Buick LeSabre and 2000–2005 Pontiac Bonneville with the 3.8L V6 FWD engine. The unit features a 15-inch (381 mm) core that improves heat dissipation while maintaining OE-compatible mounting and hose locations. Constructed with a full aluminum core and reinforced end tanks for corrosion resistance and long service life. Each radiator is 100% pressure- and leak-tested to prevent coolant loss and protect the engine from overheating. Precision fitment eliminates modification—direct bolt-in design reduces installation time and ensures proper coolant flow. Compatible with original equipment cooling systems and supports standard fan and shroud configurations. Designed to restore proper operating temperature under load, reducing risk of engine or transmission damage from overheating. Backed by model RK889 identification and manufacturer quality control for consistent performance and reliability. Includes pre-installed fittings where applicable and is ready for a professional or experienced DIY installation.
| Material | Full aluminum core with reinforced end tanks |
| Core Height | 15 in (381 mm) |
| Core Thickness | 1.5 in (approx. 38 mm) |
| Fitment | 2000-2005 Buick LeSabre; 2000-2005 Pontiac Bonneville |
| Engine | 3.8L V6 |
| Drive Type | Front Wheel Drive (FWD) |
| Model Number | RK889 |
| Testing | 100% pressure and leak tested |
| Installation | Direct bolt-in replacement, no modification required |
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