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  1. 02-09 Vortec 4.2L I-6 Engine and Drivetrain
    I have an ‘03 gmc envoy with the 4.2 vortec in it. I hit 250,000 miles the other day and got a funky knocking noise. I’ve changed the cam position sensor and the vvt solenoid thing but it still knocks. Any other ideas? I have a video of the knock linked below please help :) 4.2 vortec engine...
    engine blown knocking
  2. General
    I am on Vancouver Island BC and have a possible dead engine. Heavy knock and barely runs. 26x,xxx km, 4.2 i6, no other issues that have presented. Clean title, cv axels 3 years old, no 4WD issues, In decent condition, red, has some scrapes, all electronics work, just put new Nordman WR SUV tires...
    2003 chevy trailblazer lt 4.2 i6 engine blown parts parts truck
  3. The "How-To" and DIY Section
    Hey Guys, Anyone ever parted-out one of our TB's? My 08 LT is seized up, I need to get as much $$ out of it as possible (upside down by $4.5K).:duh::mad: Thought about stripping it down for Ebay and Craigslist....what kind of return range would I be looking at? Thanks
    engine blown engine died engine failure;engine
  4. Engine Tunes/Mods
    I know, weird question huh? OK, here's the deal. I have a 2006 Trailblazer EXT/LT with the 4.2 engine....it's been solid for the entire 235,000 miles with not many issues at all. Since it has high miles, I frequently check the oil at least once every two weeks if not more and have the oil...
    4.2 engine blown oil loss
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