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  1. 02-09 Vortec 4.2L I-6 Engine and Drivetrain
    Hello, The oil pressure gauge in my 2006 Envoy XL (4.2L) sometimes started showing too high (80-Max) So I replaced the sensor but it has not helped. I used to seeing all the gauges at zero when the engine was off but now the Oil Pressure Gauge remains between 40-60. Does the gauge need to be...
  2. The 02-09 "How-To" and DIY Section
    Hello, I’m going to install an oil pressure gauge on the cabin and I was just wondering how others have done it? I got some copper tubing instead of the plastic tubing that was included. I’m thinking I’ll need to go backwards, up around the exhaust, then above the spark plugs then down to the...
  3. OEM Issues
    I have a 2007 blazer. It has approx 200k on it. Recently, once the vehicle warms up (driven a couple of miles), when you come to a stop, the oil pressure gauge in the dash will rapidly drop to 0. Engine still runs with no clatter or unusual sound. If you bring the rpms up to approximately...
    oil
  4. Screenshot_20220613-003742_UPlayer.jpg

    fluid capacity estimates for 4.2 L 6
  5. 02-09 General Tech Q&A
    Hey guys, this is only my 2nd post BUT DEFINITELY NOT MY 1ST Problem w/ my Trailblazer. So I have an '04 TB LT EXT with about 162k. So about a month or two ago. I had an oil change at a local shop. They replaced my filter with a non ACDelco, and I seemed to have been having oil pressure issues...
  6. 02-09 General Tech Q&A
    Hello. I'm a first time poster, and also first time trailblazer owner. I have a 2004 Trailblazer LT EXT I6 with 162k. I live in a colder climate and this is my first winter with the vehicle. ITS BEEN COLD. We've had consecutive days with 0-20°F temps. I've had/have a few minor issues and...
  7. TrailBlazer / Envoy Chat
    My 2005 trailblazer ls had an oil pressure problem then while driving just turned off. The motor cranks but does not start does it just need an oil pump replacement? Shouldn't it turn over for just a couple seconds?
  8. 02-09 General Tech Q&A
    I’m about 1,500 miles away from my next oil change, but the warning came up on my dash that I had low oil pressure. The message disappeared quickly and because I was in the middle of the country, I continued driving home. The message didn’t pop up again. My oil light is broke, so the only...
  9. OEM Issues
    Hello trailvoy users, I'm trying to remove the tube where the oil dipstick sits in. Reason be is because I'm trying to remove the exhaust heat shield. I already have all the rusted screws out the shield but the oil dipstick tube is in my way and I'm trying to remove it and looked all over the...
  10. General
    I've used Mobil 1 syth oil since I got my TB. It's a 2005 LT that I bought in 2007 with ~45k miles. It now has almost 190k on it and I was told that due to the age of the engine, it might be best to NOT keep running synthetic in it. What are your opinions on switching? I'll still keep the...
  11. OEM Issues
    Good Afternoon Everyone !!!... So a few days ago I noticed there was white smoke coming from my exhaust, and throughout the day I started realizing that it only appeared on the initial startup and NOT when it was in normal operating temperature anymore. The truck runs smoothly with no rough...
  12. General
    I have been sitting on this problem for a while now and reading horror stories about the lifter/AFM/replacement engine costs so I finally decided to start investigating the problem to see what I could find. My engine is only misfiring on cylinder 4 so I have changed the plug (have the others to...
  13. OEM Issues
    I have a 2008 Chevrolet Trailblazer LTZ 5.3L V8 140,000 km. Two days ago when I started the car and began driving, I noticed the “Check Gauges” light had come on and the oil pressure gauge needle was exactly at 0. I immediately stopped my car and shut down the engine to check the oil level which...
  14. General
    I have a 2008 Chevrolet Trailblazer LTZ 5.3L V8 140,000 km. Two days ago when I started the car and began driving, I noticed the “Check Gauges” light had come on and the oil pressure gauge needle was exactly at 0. I immediately stopped my car and shut down the engine to check the oil level which...
  15. 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.
  16. OEM Issues
    Since I've bought my trailblazer used, I've changed the oil three times, and have used Chevon Supreme 5W-30, which the guys over at bobistheoilguy.com say is about the best dino oil you can get. I don't want to use full synthetic, and would rather stick with straight dino oil. Anybody recommend...
  17. OEM Issues
    Hey everyone! I've been stalking this forum for about a month now since buying a 2004 Trailblazer LS. There is a TON of awesome info on just about anything I need, and even a bunch of videos. I used several of these resources to change my spark plugs and clean the throttle body at about 91,500...
  18. OEM Issues
    I am not new to the site, but have used it to fix small issues with my 04 Trailblazer. I want to thank everyone for their posts. I do have a issue with my trailblazer and i am hoping that someone can point me to the right thread or maybe say what needs to be looked at fixed. 1. On vehicle...
  19. OEM Issues
    About 2-3 months ago, I had a bit of a run-in with a guard rail and some black ice, and my '02 Bravada sprung an oil leak from a corroded metal line located on the driver side. The line runs down and connects to a rubber line that goes underneath the fan and radiator and then turns into another...
  20. Exterior
    My oil pan shield/engine protection shield is missing and I would like to replace it. I am having troubles finding a part number to order it. Any help would be greatly apprectiated, for 2007 Trailblazer, 4.2L, 4WD.
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