Buy OEM 2012 General Motors Part # 19354854. Radiator Hose Clamp (Upper). 6.6 LITER DIESEL, 2017-19. Radiator - Repair or Replace Typical symptoms for a failed radiator include

Clamp, Radiator Inlet Hose.
Radiator Hose Clamp.

Radiator Hose Clamp

Fits Sierra 2500 HD, Sierra 3500 HD, Silverado

6.6 LITER DIESEL, 2017-19.
Radiator - Repair or Replace
Typical symptoms for a failed radiator include both an overheating engine and a coolant leak. But some radiator failures can also result in burned or dark transmission fluid. If the cooling system in your 2012 needs attention, contact a factory-trained technician.