Radiator and Cooling Fan for Chevrolet Blazer (1996-2005) 4.3L

High-Efficiency 4-Row Aluminum Radiator and Electric Fan Kit for 1996-2005 Chevrolet Blazer

What it Does: The 4-row aluminum radiator and electric fan kit replaces the failure-prone factory cooling assembly on the 1996-2005 Chevrolet Blazer to maximize thermal dissipation and prevent engine overheating under high-load conditions.

The Stock Chevrolet Blazer Thermal Vulnerabilities

Factory cooling assemblies on the GMT330 platform utilize crimped plastic end tanks mated to a thin core. Over sustained thermal cycles, these composite tanks become brittle, developing stress fractures along the crimp seam that cause catastrophic coolant loss. Additionally, the factory viscous fan clutch degrades over time, slipping excessively at low engine RPM and failing to draw sufficient CFM across the core. This leads to heat soak, detonation risk, and elevated operating temperatures in the Vortec 4300 V6 during towing, off-road use, or prolonged idling.

The Engineering Solution

This direct-fit kit replaces structural weaknesses with 100% TIG-welded aircraft-grade aluminum construction. Featuring a brazed 4-row crossflow tube-and-fin core, it drastically increases fluid capacity and core surface area compared to single- or two-row stock units. The included aluminum shroud seals tightly against the core face, housing dual 12V 80W electric fans to draw continuous, high-velocity airflow independently of engine speed. By eliminating the parasitic drag of the belt-driven mechanical fan, this setup optimizes coolant delta temperatures while freeing up rotational efficiency. Designed to replace industry part numbers DPI1826 and CU1826.

Technical Specifications

Compatibility

• 1996-2005 Chevrolet Blazer 4.3L V6 (All Trims)

Frequently Asked Questions

Does this fit the GMT330 Blazer?
Yes, this is a direct fit for the 1996-2005 Chevrolet Blazer equipped with the Vortec 4300 4.3L V6 engine.

Do these electric fans require an auxiliary relay harness?
While pigtails are supplied, wiring via a dedicated 30A/40A thermostatic relay harness is required to ensure safe current handling and automated temperature control.

The Chevrolet Durability Standard

The 4.3L S-10 platform demands heavy-duty cooling to sustain high-torque towing and low-speed trail crawls. Upgrading to an all-aluminum brazed core with dual electric puller fans guarantees dependable heat rejection, stabilizing operational temperatures and extending transmission and engine life under severe operating duty.