I am currently working on my wife's 2004 Chevy Impala LS. 3.8 V6 with 202K. This started with the fact that my wife's AC was not blowing cold air. I hooked manifild gauges and found that both high and low side pressures were low, making me think that it was low on coolant. I added leak detector dye to the system and by the time I was going to add refrigerant, the coolant was boiling back up into the resevoir. I immediatly shut down the car. No coolant in the oil, no wetness on passenger side floor. After checking the thermostat (195), it did not open until after water rapidly boiling (and opened barely). I flushed the system, installed a new cap and thermostat (180). Now I filled the system and got it up to temp, and noticed that the cooling fans did not come on at all. Would not turn on with AC on or heater. All fuses checked out OK, but did not test relays, as it was getting dark. I also noticed that while on heat, the driver's side air was not very hot, neither side was cold on AC. I have also (within the last sevearl months) replaced the coolant temp sensor and rear O2 sensor, trying to get rid of engine light code (to no avail) have not had it scanned recently. I know that this is a lot of information and I'm not sure if they are all related or not, but wanted to give everything. Please help, this thing is driving me crazy.
Wednesday, July 11th, 2012 AT 1:18 AM