You should probably bring it to a mechanic because it is very difficult to replace the heater core on GMC pickups.
What are the steps to change the heater core on a 1991Chevy S10 pickup ?
The 1996 GMC half ton pickup truck heater core can be removed by removing the heater core retaining bolts. Remove the heater core water lines. Reverse the process to install the new heater core.
You do not need to completely remove the dashboard in order to change the heater core. Remove the water hoses from the heater core. Remove the heater core retaining bolts. Reverse the process to install the new heater core.
To bypass the heater core you need to remove the two water hoses going through the firewall from the engine compartment to the heater core and connect them together so that the water loops around back to the engine.
To change the heater core in a 1976 Ford F250 pickup, first disconnect the battery and drain the coolant from the radiator. Remove the dashboard and any components obstructing access to the heater box, which is typically located on the passenger side. Unbolt the heater core from the heater box, replace it with the new core, and reassemble everything in reverse order. Finally, refill the coolant and check for leaks before reconnecting the battery.
mercury villager heater core 2001
Replacing heater core on a 2001 chevy,cavaliar.
Heater core? Inlet or outlet hose fitting at heater core?
how do i replace a heater core in a 2001 Chevrolet blazer
i need to know how to replace the heater core on my 1992 s-10 pickup
Where is heater core located on 92 chev
how to remove the lines from the heater core on a 2001 expedition