coolingHeater Core Torque Specsfor 2002 GMC Sierra 1500 4.3L V6 Vortec · RWDUnitslb-ftNm11 fastenersSeqComponentTorqueAngle—Cover Screws8 lb-ft · 11 Nm——Dashboard Screws2 lb-ft · 3 Nm——Drain PetcockHand tight6 lb-ft · 8 Nm——Fan Bolts9 lb-ft · 12 Nm——Heater Core Mounting6 lb-ft · 8 Nm——Heater Hose Clamps2 lb-ft · 3 Nm——Hose ClampsDo not overtighten3 lb-ft · 4 Nm——Housing Bolts10 lb-ft · 14 Nm——Mounting Bolts20 lb-ft · 27 Nm——Pump BoltsTorque in sequence21 lb-ft · 28 Nm——Thermostat Housing Bolts12 lb-ft · 16 Nm—📝 Suggest a correction to this torque spec