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coolant

  1. [SOLVED] Coolant help

    The 02-09 "How-To" and DIY Section
    Hello Folks, I'm decided to flush my coolant system and replace. All was well until I put everything back together. I took the 2006 Envoy 5.3L for a ride an the temperature gauge spiked to the red as I was pulling back into the driveway. I touched the upper radiator hose and it was cool, so I...
  2. Large/Fast Coolant Leak - after replacing thermostat and water pump

    OEM Issues
    I recently expietenced a cooling system failure on my way back to work on lunch break. My engine temp spiked and my engine alarms started going off. Luckily I was really close to my work. I was able to get it to the parking lot, opened up the hood and coolant was spraying/leaking everywhere. It...
  3. coolant resevoir / cooling system leak

    General
    I have an '03 ext and noticed it running hot the other day --made it home ok but really freaked me out to see the needle go up that high! I went to add some coolant to the resevoir and notice that it was all landing on the ground under the vehicle and just splashing on the driveway -- not sure...
  4. Coolant flush fail

    General
    I found a puddle of coolant in the driveway the other day. Thought it was tranny fluid at first but then noticed the level of the overflow reservoir was low. When I went to drain the coolant it looked as if the leak had come from the lower radiator hose. So I drained the fluid and replaced...
  5. 2007 Trailblazer Thermostat/radcap/belt

    OEM Issues
    Im going to replace the thermostat (code p0128) and I had a few questions about the parts. The stant thermostat #14659 says 187º on the website and Amazon says 190º. Are these operating temperatures or the temp at which it opens up? I know the truck's correct operating temp is 210º. Would you...
  6. [SOLVED] Questions about Thermostats and Coolant Flushing

    General
    My apologies if this wasn't the right place to post this, or if something incredibly close to this was posted before, but I figured i'd ask you guys a few questions! So, took my car into the shop this morning to get a coolant flush done. I was dreading it because I know it would be cheaper to...
  7. Omar

    Engine Tunes/Mods
    Hi I have an 04 EXT trailblazer w/5.3 V8. I am having issues with the leaking coolant right under the resivor tank that spills under to the passenger side wheelwell. I recently replaced the radiator because it was according to my mechanic it was "blunging" and it was leaking. It was running...
  8. 03 4.2L overheating and leaking coolant

    General
    Went to pick up my wife today and noticed no heat blowing from the heater and engine temp rising quickly. As well as fan running hard. I pulled over, and the coolant was gone from the rez. I didn't check the rad as it was still hot. Upon getting back home I noticed all my coolant on the...
  9. Leak

    General
    Hello. I'm the proud owner of a 2004 Chevy Trailblazer LS Ext. I have owned this vehicle for almost four years and never had a problem until now, but first of all, I want to thank everybody. I'm not a mechanic. I'm a network/ systems engineer. I work with servers, switches, routers...
  10. 2002 Envoy - Can only describe as "wheezing"

    OEM Issues
    I have an '02 Envoy that has been giving me fits. A little history, a few years ago it started doing what I would call wheezing. Under acceleration, instead of a low smooth rumble, the engine would sound like it was under a much higher load (RPM's normal) louder and more of a high-pitched...
  11. Ambient Temperature Effect on Cooling?

    General
    Hello, Today it's the hottest its been in Iowa for as long as I can remember--blazing sun, 99 degree's with 115F "real feel". The wife did some stop and go traffic today over the course of two hours with stops in between for appointments. Usually the TB stays solid on the 210 mark, but today...
  12. Three Major Issues in a Row - Please advise

    Engine Tunes/Mods
    I've had my 2006 Trailblazer for four years and never had a problem. This past October I noticed that my coolant gauge kept fluctuating and then started to go way over to high. I went right in to the shop and they said the coolant was low, filled it up and sent me on my way. About two weeks...
  13. What is this unit leaking coolant?

    OEM Issues
    :confused: I have been lurking around this forum for quite some time. This has a vast set of knowledgable people and resources. Now comes to the time where I can't find an answer and have come asked for help. My 2003 EXT 4x4 V8 is leaking coolant slowly from nowhere. It takes about a week...
  14. Coolant/Overheating Problem

    OEM Issues
    2004 Trailblazer Ext, 4.2L Hello everyone. About 2 weeks ago my Check engine light came on; I stayed on for around 2 days and went off. I got to an Auto Zone after it went off and had the code read, they said the code that came up was for low coolant temp, during this whole time my temp gauge...
  15. Coolant pours out of reservoir

    OEM Issues
    I have an 02 TB LTZ 4WD and this morning I changed out coolant and replaced upper and lower radiator hoses @ 114K. Everything seemed to go according to plan until I added the last bit of coolant to the overflow reservoir (after having filled the radiator) and it just poured out the bottom of...
  16. Coolant Temps- 202-215F Seem high?

    General
    Yesterday was 90 Degrees with 90% relative Humidity. When Running the AC, my engine Temps according to the scangauge were ranging between 204 Degrees at cruise and sitting in traffic on the mass pike, and as high as 215 Degrees While WOT up hill passing a truck. Shut off AC it runs 195-197...
  17. Heater Control Valve Coolant Leak

    General
    I have had a coolant leak from the heater control value. The leak is from the top and not from the hoses themselves. I replaced the heater control valve and the problem continues. What is the small vacumme line that attaches to the top? When it is attached it leaker much worse (because there is...
  18. Fluid Maintenance besides Oil changes?

    General
    Last night I was changing oil in the TB. I switched to Amsoil full synthetic last year from Mobil 1 synthetic and I'm doing the 1 year/25k oil change schedule. It's been 1 year and only 8,473 miles. While under the hood I was checking the other fluids. I checked the PS fluid and it was...
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