I have a 2003 Trailblazer 4.2 with 102,000 miles. I am getting the following symptoms. Enclosed steps to reproduce the problem:
- Start Engine and everything is normal with air conditioning on,
- After I ride for some 15 minutes and get traffic, the vehicle start to low rpm below 600.
- Then, I start to receive message of "Check Gauges". When I look, I see that oil pressure is below 40 psi and drops to 0. Then, the message center says: "Stop Engine - Low Oil Pressure".
-Then, I put it in Neutral and idle a little bit. After this, the RPMs start to rise, oil pressure gauge reads 40 or little bit more, and no more message.
-Oil Pressure sensor changed about 4 month ago after I started to see these symptoms.
-I turn off the air conditioning and there is no change.
-One time I got this issue and at some moment the temperature started to rise to 230 and I start to hear the coolant reservoir bubbling like boiling water.
My wife usually use this vehicle and she is driving me crazy getting frustrated with this. I am trying to solve on my own prior to go to the dealership. Help!!