Isuzu, GMC, Chevrolet Radiator - Isuzu 8973115580, Spectra Premium SPI20010702, Active Radiator Supply Company 580026PT, Reach Cooling 42-10136

The Reach Cooling 42-10136 is an aftermarket radiator engineered as a direct replacement for Isuzu NPR, GMC W3500 Forward, GMC W4500 Forward, and Chevrolet W3500 Tiltmaster medium-duty trucks. It directly replaces Isuzu 1040080, the primary OEM interchange, along with Active Radiator Supply Company 580026PT, Spectra Premium 2001-0702, 1-800-Radiator 2400308, NAPA 20010702, and Keystone Auto Industries HDC010086AA. Fitment spans a wide range of applications including the Isuzu NPR from 1994-1997 in 3.9L and 5.7L configurations, the 1999-2003 NPR 5.7L, and the 2003 NPR 6.0L, as well as the 1995-1997 Chevrolet W3500 Tiltmaster in 3.9L and 5.7L, the 1995-1997 and 2003 GMC W3500 Forward in 5.7L, and the 1994-1996 GMC W4500 Forward 3.9L. The aluminum core and plastic tank construction is built to meet or exceed original equipment specifications, and the included transmission oil cooler means this unit is a complete, ready-to-install replacement. Reinforced tube-to-header joints, folded fin edges, and thermal expansion cuts are built in to resist vibration, reduce leaks, and extend service life. For mechanics and fleet buyers sourcing a reliable, correctly fitting replacement, the 42-10136 installs without modification and performs to OE standards.