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  1. 02-09 Vortec 4.2L I-6 Engine and Drivetrain
    I blew the heads on my inline 4.2 6 cylinder can I just replace it with the other engine options without having to modify anything because it's going to cost $5,000 to repair this inline 6 and I would rather have an engine that would cost less to repair than an inline 6. Can I drop the 5.3L v8...
  2. 02-09 Vortec 4.2L I-6 Engine and Drivetrain
    I just received news today, from my mechanic of 20 years, that I will need a new engine in my 2002 Trailblazer. I'm sick about it. I love this vehicle. Checking around, there are a couple of used motors for about $600 but they have 200K miles on them. I have 236K on mine, but I know my...
  3. 02-09 Vortec 4.2L I-6 Engine and Drivetrain
    Howdy, folks. Have an 02 trailblazer with LL8 throwing a P0014 code for cam phaser timing too advanced. Figured it was time to replace timing chain and cam phaser after replacing VVT solenoid and cam position sensor to no avail. Bought a motor with less miles, verified compression across...
  4. 02-09 General Tech Q&A
    I need to change my valve cover gasket soon and I know it’s a pain in the rear end…lol…so I know we shouldn’t disconnect the battery but to do this I have to disconnect the NEG terminal….is there anyway I can do this without removing the NEG??? or removing fuses or something I can get to trick...
  5. General
    Hello everyone. Im gonna try to be concise here, but I have a tendency to ramble so bear with me. I am rebuilding my truck. 2002 TB LTZ. I wanted to upgrade to an 07+ tahoe, but I have no interest in paying over 10k for a car from 2010 right now. So my trailblazer with 220k on it is going to...
  6. 02-09 Vortec 4.2L I-6 Engine and Drivetrain
    I’ve seen a few threads but can’t find a solid answer. My 2005 trailblazer engine is bad, no compression after over heating the crap out of it on the way to Las Vegas in 117 degree heat. Now I’m looking to swap it out but the only engine I can find locally is a 2004. Will that work? Anything I...
  7. 02-09 Vortec 4.2L I-6 Engine and Drivetrain
    Hi everyone I had recently found out someone took my oil pan off my trailblazer so the old lady drove it and it blew up. I am wondering what engines I can put in it and what else I will be needing for the swap. 2005 trailblazer ext 4.2 straight six
  8. 02-09 Vortec 4.2L I-6 Engine and Drivetrain
  9. 02-09 Vortec 4.2L I-6 Engine and Drivetrain
    Hi everyone! This is my first post here, so forgive me if this the wrong section. I have a somewhat bizarre issue and thought I would see if anyone has any ideas. I have a 06' LS 4wd with the 4.2. A few months back, I replaced the fuel pump as the sender unit went out, and after about a week...
  10. 02-09 General Tech Q&A
    My trailblazer makes a loud rattling noise that sounds like a dancing gear or a dancing belt hitting something/rubbing on something. It's coming from the very front of the valve cover, the truck runs fine and doesn't have any issues, it just makes a concerning noise. Note: I'm running it with...
  11. General
    I've been jumping around this forum for a bit, so I figured I should share my story and why I ended up seeking out a Trailblazer. Basically, I spent two years working as a mechanic in a shop and fell in love with the profession. I ended up going back to school, but I wanted to continue learning...
  12. General
    Hello all, New to this site and to say it has been super helpful is quite an understatement. I did some work on my TB (new valves, timing chain, water pump, etc.) and had to unplug most of the wiring harness in order to get this done. I have put it back together and I am stuck on this plug (see...
  13. Engine Tunes/Mods
    I am new to posting on this forum, but I was looking to see if anyone else has ever swapped a 2006 4.2 Trailblazer motor with a 2007 4.2 Trailblazer motor? I have seen throughout the internet, where other people have swapped them without any difficulties. I just wanted to make sure that I...
  14. Engine Tunes/Mods
    Hey lads, just recently got my first trailblazer I plan on turning into an offroad God. Want to know if it's possible to slap a Silverado 1500 or similar engine cover, seeing as it looks sort of bland when you open the hood. A mundane thing I know, but, I'm one that likes to take pride in the...
  15. 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...
  16. OEM Issues
    Got car used from Jake Sweeney back in July. Car makes whining noise maybe belt issue. 182,500 miles on car. 4.2 v6. 27 percent oil life. Just got a Hum from Verizon (kinda like onstar) put reader in the OD spot. Popped up code P0014. And for first time SERVICE ENGINE LIGHT CAME ON. Car...
  17. General
    Engine rocking (literally) more than usual. Just started during bad weather. The movement of the engine actually makes the vehicle rock back and forth. Especially noticeable in gear at idle (low) speed. Less noticeable at higher speeds. Also, engine seems to be low powered, not as much pick up...
  18. General
    I have an '06 Envoy Denali with the 5.3L Vortec V8 and about 6 months ago the engine seized up and I had a rebuilt one put in. There is a 100k warranty on it but now it shifts into 2nd weird.. Almost like it hesitates. The truck has around 140,000 on it and I was wondering what you all think I...
  19. Engine Tunes/Mods
    Hi everyone, Before you get offended from what I am going to say, I'm not trying to put out a bad review to PCM4LESS, and there are many threads on here praising them, in which people have LOVED their tuned PCM's. I just recently installed my tuned PCM from them and wasn't too impressed...
  20. The "How-To" and DIY Section
    I have researched it up, and I've found several accounts of what it could be. The most common that seems to be popping up is the throttle body is dirty needs to be cleaned. But there is another one with a coil? I have attempted to research how to fix that, but I cannot find anything about it...
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