Search Results for ‘heater core’

Anybody have experience replacing the heater hoses? I just changed the heater core on my brother's 02 Trailblazer LT. We unfortunately snapped both quick connects going to it on the firewall despite being VERY careful. Looking at the vehicle from the front, the right one that snapped actually...

I want to totally bypass my heater..front and back.....not at firewall , because hose runs thru three way switch.....just simple old fashion loop to bypass ......which hose comes from engine? Which hose returns? Some reason 2002 schematic just does not seem like its available...no the 2003 shows...

I have a 2003 trailblazer ext. My issue is that I am replacing the actuators currently and they work just fine now after a reset but the vents don't put out any heat. I've gone below and felt the coolant lines, they seem to be warm and the ac lines seem to be cold. The issue was present before...

Hey everyone, im new to the forum so trying to still figure out how this all works. :) I have a 2002 GMC Envoy and the A/C worked great all summer but when it got cold and I tried to use the heat, it wasnt getting hot. I replaced the thermostat and that didnt help. Engine temp gauge is running...