Hey Guys I just bought a 2000 LS with 161,000kms on it,Yesterday it was -35 so went out and started my car and let it run for about 15 mins,Got in to drive to work and it was blowing cold air,the temp gauge on the dash was right where it should be but no heat.I went to the dealership and they told me i might have a bad head gasket because my rad hose didnt have pressure,I find that crazy that right off the hop he tells me its a head gasket and didnt even try anything else knowing that LS have bad thermostats,Can anyone out there help me with what might be going on??? thanks for the help.