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TrailblazerSS
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29 Posts
I stuck a lifter on my 06 but it squealed more than knocked. Either way stop running it and tear her down before you do more damage .
 

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Premium Member
2007 AWD 3SS
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8,588 Posts
Mine did that about 4 years ago...changed the oil and added a quart of Marvel Mystery Oil...quiet ever since.
 

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Hooked on speed
06 Trailblazer SS
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3,099 Posts
Another fix is replace 1 quart of oil with Dexron and run it. Then change oil after it's freed up.
 

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Premium Member
08 trailblazer SS
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3,614 Posts
Doesn't really sound like a stuck lifter to me. Any other issues then the noise? I know anytime I have seen lifters stuck in any other ls motor they had other issues like a misfire.
 
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