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over heating

  1. Oil pressure gauge is at 0, mechanic says to replace the whole engine

    OEM Issues
    So my dad's 2003 Envoy has been over heating for a while, but about 2 weeks ago the oil pressure gauge was going low, so he took it to a mechanic, who changed the oil pressure sensor, but when he did, the oil pressure dropped to 0 and stayed there. So he had him change it back, and it's still at...
  2. 03 Trailblazer running hot after thermostat change

    OEM Issues
    My 03 has about 90 thousand miles on it. The other day I was driving and the check engine light came on. I hooked up my scanner to it and it was giving the code for the thermostat. I changed the thermostat in it and now it went from running too cold to running way over 210 but not in the red...