Question about 2002 Chevrolet TrailBlazer

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2002 trailblazer ext stalled and the shut down, low oil pressure came up on the dash and not it won't start

I was driving and my trailblazer was losing power and I pulled over and it shut down with a message that said low oil pressure..I just had the oil changed 2 days before

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  • Brad Kirby
    Brad Kirby Mar 27, 2014

    It could be the oil filter (or drain plug) wasn't tight or properly installed and allowed oil to leak out until you lost pressure. It could also be a new problem that is unrelated to the oil change. Have you checked your oil level?

  • Justin
    Justin Mar 27, 2014

    Oil level is at full and I cleaned the throttle body out and still won't start

  • Ricky Peters
    Ricky Peters Mar 27, 2014

    Check for spark at any of the sparkplug wires and let me know if you have spark.

  • Justin
    Justin Mar 27, 2014

    I got it to finally start but when I turned on the heat or a/c it wanted to die, so I turned them off..when I press the gas pedal I barley goes over the 1 on the rpm gauge

  • Ricky Peters
    Ricky Peters Mar 27, 2014

    So you have fire.Now you will need to check the fuel pressure.What size motor?

  • Justin
    Justin Mar 27, 2014

    4.2l i6

  • Justin
    Justin Mar 27, 2014

    When they changed my oil I just noticed they put a new drain plug in and it's got new oil around it and nowhere else...could this be the low oil pressure from it being a different one? Should I try and tighten it

  • Ricky Peters
    Ricky Peters Mar 27, 2014

    How low was the oil when you checked it.

  • Justin
    Justin Mar 27, 2014

    Full

  • Ricky Peters
    Ricky Peters Mar 27, 2014

    OK then.If you check your fuel pressure and its within the specs then i would think there is a sensor at fault and this motor is famous for the cam sensor going bad.The only way to know for sure you will need a lab scope.

  • Justin
    Justin Mar 27, 2014

    Would the cam sensor cause it to not start

  • Justin
    Justin Mar 27, 2014

    Just did a code scan and it came up with p1516 and p1220

  • Ricky Peters
    Ricky Peters Mar 27, 2014

    These codes you gave me they have to do with the throttle body only.So i would check all wire connectors on the throttle body for a good connection plus check all the ground wires underhood then try to clean it.If none of this helps you may need to reflash your computer.There are several service bullitens on this problem

  • Ricky Peters
    Ricky Peters Mar 27, 2014

    P.S. Some of the wire pigtails are known to have been broken inside the pigtail itself.

  • Justin
    Justin Mar 27, 2014

    Can you replace the pigtails and make it work again or do I need to buy a new throttle body?

  • Ricky Peters
    Ricky Peters Mar 27, 2014

    I would replace the pigtails first because they don't cost that much.You can get them from www.rockauto.com or other places online and maybe at you local autoparts store also make sure to take any grounds loose on or around the throttlebody and sand them then if the problem still exists then you might have to replace the throttlebody.

  • Ricky Peters
    Ricky Peters Mar 27, 2014

    P.S. I also would try to clean the throttlebody as good as i possibly could

  • Justin
    Justin Mar 29, 2014

    It has a new battery as well, and when they put it in the throttle body was dirty so could it be set to that of a dirty throttle body? Now it being clean I got it to start but won't go ove 1500 rpms and now won't start again..if the alternator is bad could this be the cause of it?

  • Ricky Peters
    Ricky Peters Mar 30, 2014

    I would check the fuel pressure and if its not within the specs then replace the fuel filter and fuel pump..

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  • Chevrolet Master
  • 2,620 Answers

Safety feature.Check oil, if low then fill then see if it will start.Always check oil level once a week if car burns oil a lot..

Posted on Mar 27, 2014

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Posted on Jan 02, 2017

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daves944
  • 1050 Answers

SOURCE: lost oil pressure

Highly unlikely that you need a pump, but it is possible that the pick-up tube that extends down into the oil pan, from the pump, has become loose or broken and dropped off it's mount and into the oil pan. It is also possible that the screen on the pick-up tube has become covered in sludge build-up and is no longer allowing oil into the pump. The next course of action would be to remove the oil pan and have a look at the condition of the oil pump pick-up tube and go from there

Posted on Apr 13, 2009

  • 22 Answers

SOURCE: Runs Ok...engine warmed up...come to red light or

Sounds to me like the Throttle Position Sensor. Thats usually what makes the throttle "rev" But that is not going to make the oil pressure drop. Pull the codes from your car and look them up online. sometimes there is an extra fuse u can add to your panel and turn the key on and it will flash your codes via the check engine light. i.e. if the light flashes 2 times then small pause then 1 time and long pause that is code 21. if there isnt a extra fuse you can usually jump it with a paperclip and pull the codes. not really sure how to do that with yours. but im positive Google knows ;)

Posted on Oct 20, 2009

  • 12650 Answers

SOURCE: 2002 Trailblazer. My oil pressure low dsiplay came

could be a few things-(if oil pressure is showing low usually under 20 lbs recheck oil level) bad sensor,oil pump,low oil level ,sludge have truck scanned for trouble code some stores such as auto zone / advanced auto scan for free

Posted on Nov 04, 2009

bonedivers
  • 1140 Answers

SOURCE: 2004 chevy trailblazer 4wd 6cyl.

could be related, could be sending unit. make sure it's full of oil first

Posted on Jun 03, 2011

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