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trailblazer engine knock
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  1. OEM Issues
    So I have my 5.3l 04 trailblazer throwing codes for the tps and knock sensor. Codes p0120 p0220 and p0332. First 2 are tps sensors a and b. Last code is knock sensor bank 2. Any suggestions before I tear both off and replace them. If not any tips on replacing them??
  2. OEM Issues
    I am new to this site and hoping someone can help. I have a 2003 trailblazer 4.2L I6 with an upper engine knock. The noise is coming from the upper front of the engine. Have ruled out the accessories on the front of the engine by running the engine without the serpentine belt, noise still...
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