Discussion Starter · #1 ·
I have a 2002 GMC Sierra and I am experiencing less than normal heat output and sometimes very little heat. Initially I had to have the intake seals replaced and it was after that that I started having heating issues. Prior to that the heat was working fine. After the intake work was done I had no heat. At that point my mechanic replaced the heater core. At this time the intake and outtake of the heater core hoses are both hot. At this point I don’t understand what the problem is. If my heater core is getting heat then why don’t I have a good amount of heat and why isn’t my blower blowing as hard as it did before.I’m looking for any other possible issues that would be causing this. Appreciate any help.