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oil pressure

  1. Oil Pressure Drops at Idle when Hot

    General
    My 2005 GMC Envoy has 171,000+ miles on it. After running for about 15min or so, when I'm at idle at a redlight my oil pressure drops, but if I put it in neutral and rev the engine it goes back up. I checked the oil level while warm and it was good. Most of my parts are in good shape as I've...
  2. 2003 Bravada Front Diff Replacement Gone Wrong, HELP!

    4x4 Drivetrain
    The front differential on my 2003 Bravada went out. I had brought to local mechanic who ive went to before. After 3 weeks or so I got a phone call yesterday. The mechanic said that its finished. I went and paid for it, $1200 for diff and labor. Pulling out of mechanics parking lot about 1/4 mile...
  3. Engine Light with Noise and Youtube Video

    OEM Issues
    2006 GMC Envoy Denali Help: Here is a quick sequence of events that I'm hoping someone with some mechanical inclination can help with: 1. Four months ago I'm driving to the hospital for an outpatient procedure. It's incredibly cold outside (teens at least). Oil pressure gauge drops to zero...
  4. Oil Pressure Switch Question

    General
    Do I need to drain the oil in order to change the oil pressure switch? I'm thinking yes, but I want to make sure.
  5. Vehicle oil pressure went to zero, engine stopped

    General
    Hi, I am new to this site and thought that I would try asking you folks. Recently, my 2006 Trailblazer was making an odd somewhat nocking noise as I was driving home from work. Shortly after the noise began, the oil pressure went to zero and the engine seized up or shut down. I had it towed...
  6. 06 trail blazer 5.3 oil pressure issue

    Engine Tunes/Mods
    Bought my 06 trail blazed from auction about a year ago with 167000 miles. Right off the bat I had an oil pressure problem. Change oil and filter with mobile 1 syntactic this helped keep pressure up for the most part; but it always takes a few seconds for the needle to pop up and the lifters to...
  7. Cooling Fan, Coolant Leak, Mode Actuator and Oil Pressure problems

    General
    A year ago I replaced the cooling fan clutch and fan as well as the radiator in my 2002 Trailblazer. I've recently started having the same problems with the vehicle as I had a year ago. The problems are: when idling at a stop light, in traffic, etc, car begins to run hot and the oil pressure...
  8. Problems with oil pressure gauge TB 06

    General
    hello, im new in the forum! I read some post and I'm confused I have a TB 06 and I have problems with my oil gauge the pressure gauge marks 0 but when accelerated is increased to 275 (normal) and then falls to 0 again it's the oil pressure sending unit? or Oil pressure switch? thank'S...
  9. oil pump

    OEM Issues
    Hello everyone I got a 2002 EXT 4.2L I6 and its been smooth sailing for about 5+ years its only got 124,000 miles...I know this has been just about beat to death...I have been through changing the oil pressure switch a year ago...all has been fine until just about the same time this year, I got...
  10. Normal Oil Pressure?

    OEM Issues
    So for the last few months, I have been driving my wifes car to work (80 miles round trip) and she has been taking the Envoy XUV (10 miles round trip). I miss the Envoy, but not the money I was spending on gas! Recently, I changed the oil prior to driving to Florida for vacation. During the...
  11. Oil pressure switch or sending unit?

    General
    I have been reading threads for hours and I think I am more confused than ever! LOL I know there has been alot of posts about the oil pressure dropping to 0 when a car idles and I have read all the responses about the oil sending unit. I also read that cars with a light have an oil pressure...
  12. [SOLVED] Oil Pressure guage says 80 psi???

    OEM Issues
    Hello all. I am so glad I found this site. Having and issue with oil pressure. Yesterday it was reading between 60-80 and now it is just buried in the 80 mark. Even when the engine is off it reads 80 psi. I know that there is no pressure when the motor is off so it must be the guage. I...
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