YES. You need a special tool to remove the quick disconnect hose.
Could be: Low coolant in the radiator - or - thermostat stuck open - or - heater core plugged.
The front expansion valve is clogged.
how to change heater core in 98 suburban
Trouble code P0135 means:O2 sensor heater circuit malfunction (bank 1,sensor 1)
where is the heater control valve on a 1994 2500 suburban
Drain the radiator. disconnect the heater hoses as they go through the firewall. From inside of the cab, remove the heater core housing, then the core. Reverse the procedure to finish the installation.
That is called a quick disconnect fitting and it requires a SPECIAL tool to get it loose.
First, disconnect the negative battery cable, and the instrument panel. Drain the cooling system before you raise the vehicle and disconnect the heater core. Remember to dispose of the drained fluid and return every component to its right place.
Disconnect both heater hoses from heater core and connect them together
Yes there is a special tool to reach in and discconect the hoses, parts store should have one,got mine from NAPA (ultra pro)
how do i replace a heater core in a 2001 Chevrolet blazer
Best to get the shop manual but basically: Reomove Heater hoses from engine block and drain. Remove glove box. Disconnect cables that connect to heater core. Disconnect heater core from firewall. Disconnect hoses from heater core. Pull heater core from under dash.