Keep coolant moving between the engine and radiator with the Gates Radiator Coolant Hose 21648, the upper hose for the top of the cooling circuit. It installs as a direct-fit replacement for the listed applications, including the 1985-1986 Chevrolet C10, C20 and K10, the 1985-1986 GMC C1500, C2500 and K1500, and the 1987 Chevrolet R10/V10 and GMC R1500/V1500 — see the Buyer's Guide tab for the full list of covered trucks.
Signs this hose may need replacing include visible cracking or bulging, coolant seepage at the hose, or coolant loss. If a failed upper radiator hose is the source of the leak, this replaces it; diagnose the cause before replacing.
Interchange: 26144X · MH-4648 · MH4648 · 14-2545-0 · 1425450 · 62454 · 71284 · E71284 · F11031 · 15588507 · KM-2251 · KM2251 · 8364 · C1648 · 54-01855 · 5401855
Manufacturer part number 21648.
This part cross-references / interchanges with the following part numbers:
What does this hose do?
It is the upper radiator coolant hose, carrying engine coolant to the top of the radiator as part of the cooling system on the listed applications.
Is this an upper or lower hose?
This is the upper radiator hose per the catalog position for the listed trucks.
Which vehicles does it fit?
It fits applications such as the 1985-1986 Chevrolet C10/C20/K10, 1985-1986 GMC C1500/C2500/K1500, and 1987 Chevrolet R10/V10 and GMC R1500/V1500. See the Buyer's Guide tab for the full list.
How do I know the hose needs replacing?
Look for cracking, bulging or swelling, hardening, or coolant seepage at the hose. Diagnose the source of any leak before replacing, as other components can also leak.
What numbers does it interchange with?
It interchanges with 26144X, MH-4648, 14-2545-0, 62454, 71284, E71284, F11031, 15588507, KM-2251, 8364, C1648 and 54-01855.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
