2000 Chevy Silverado heater not working

Try this
isolate the heater core and flush
do it twice
let me know

From: carter96
To: BMRFIXIT
Posted: Sun Jan 20, 2008 4:22 am
Subject: heater core
never done that before more comfortable working on outboards but not completely dumb when it comes to vechicles. How would I go about isolating heater core and flushing? Thanks in advance

Engine cool
lower the coolant level
Locate the two hoses running to the heater core
disconnect them at the engine side leaving hoses connected to heater core throw the firewall
use garden water hose and compressed air if possible
run the water and follow by air throw one side and out the other and vice versa
do that two to three times watching what leaving the heater core you are looking for the go flow and clear water to run throw
good luck
let me know