Chevrolet, GMC, Isuzu Radiator - Isuzu 8973543651, Active Radiator Supply Company 410007, 1-800-Radiator 2400311, Reach Cooling 42-10734

When your Chevrolet, GMC, or Isuzu medium-duty truck needs a radiator, Reach Cooling 42-10734 delivers an aftermarket replacement built to meet or exceed original equipment specifications. This radiator directly replaces Isuzu 8972126641 and cross-references Active Radiator Supply Company 410007, 1-800-Radiator 2400311, Serck SRK7417, NAPA 20010701, and Keystone Auto Industries HDC010047PA. The aluminum core and plastic tank construction incorporates B-type tubes with central reinforcement to resist pressure and reduce tube failure, deep extrusion headers for a stronger tube-to-header joint that stands up to vibration and thermal cycling, folded fin edges for improved stability and heat disbursement, and thermal expansion cuts that allow the core to breathe through normal heat cycles for extended service life. Fitment covers 1999-2004 Chevrolet W3500 Tiltmaster, W4500 Tiltmaster, and 2000-2004 W5500 Tiltmaster in 4.8L and 7.8L, along with 1999-2004 GMC W3500 Forward, W4500 Forward, and 2000-2004 GMC W5500 Forward in the same engine displacements. On the Isuzu side, it fits 1999-2003 NPR 5.7L, 1999-2004 NPR 4.8L, 2003 NPR 6.0L, and 1999-2004 NQR 4.8L. If you are sourcing by the Isuzu number 8972126641 or any of the other interchanges listed, Reach Cooling 42-10734 is the correct direct replacement.