Hey Everybody, I've got a problem with my 95' suburban warming up in the Minnesota cold weather. The burb. will not warm up completely idling. While driving it will warm up, but if I turn the heat on it cools down to about 140 degrees. I replaced the T-stat with no luck. The burb has a rear heater so maybe the extra hose length is cooling the system down? just a thought. The catalytic converter was removed by a PO - otherwise the exhaust is stock.

Any ideas on where I should start looking?

 

What temp t-stat did you install????

 

my 1995 Tahoe 5.7L would, seriously, take 8 MILES before it would hit 100 degrees and blow heat out... my 09... is warm after 2 miles.

 

My 95 Suburban needs about 5-7 min of running before the temp gauge even moves....runs @ about 190ish tempwise once the t-stat opens. I have rear heat as well, it doesn't seem to affect engine temp whether on or off....is your fan clutch stuck I wonder.....????

 

I installed a 195 deg thermostat - I let it warm up this morning for 10 min with the heater fan on low and it barely warmed up to 100 deg. Perhaps these 95's take longer to warm up.

 

The cast iron blocks take much longer to heat up than the new aluminum blocks do, in your area you may want to partially block the radiator.

 

I'd also check to make sure the t-stat isn't sticking...new or not, I've seen it happen. Did you have the Burb last winter, & if so, how was the temp running then??

 

This is the first winter for the burb and I will give the t-stat a check. I've run into problems with new ones sticking open as well. I will go to the dealership and get an OEM stat and see if that helps. I let ya know what happens.

 

Today I finally got around to switching out the t-stat and I am happy with the results. The burb warms up faster and stays warm - unlike before.

Mission complete - now on to the next project with the burb.

 

I had the same problem. Check the compression on each piston. If you are too low it will send a code to the computer and you will not heat correctly. As well as a few other issues, that was the major one I had.