does anyone have problems with not alot of heat coming out in the winter. I have replaced and maintained everything in the cooling system...and still only warm air coming through the vents.
(94 ls) any ideas..half the rad is covered with cardboard too...

 

bad thermostat would be my first guess...

does your engine temp every get crazy high? could be a blockage in the upper hose going to the heater core, a blockage in the heater core?

 

new thermostat/coolant (2006)
water pump (2004)
radiator(2003)

the problem is never makes it pass the line C on the gauge, only a little bit in the middle of the summer. do all tegs do this? its strange.... With all the cars I have ever had or even worked on I have never seen this.

 

I would still say thermostat. Just because you replaced it 2 years ago doesn't mean it will last forever.

PS: not all tegs do that, only ones with bad thermostats or other cooling system problems.

 

sounds like the tstat is stuck open to me. my beater does the same.

 

agreed the thermostat is stuck open, only put an oem one they last by far the longest!

 

^^I know its winter, but its heck of a lot better than it be stuck closed....