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2002 chevy trailblazer_lt
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438 Posts
Just trying to save you money here before you go digging in the oil pump.

1.) What kind of oil filter are you using?
2.) What grade and type oil are you using?
3.) When was the last oil change?
4.) Are you certain the oil level is full?

There have been incidences where oil filters have failed internally, may have been defective out of the box, and can cause restriction as the engine warms up. In the process of elimination, I would change the oil & filter first. Use a high quality conventional 5w/30 or a synthetic 5w/30. Go with an AC-Delco oil filter PF-61e.

Also the I6 has gotten looked over at oil change places or by DIY-ers before as it takes 7 quarts of engine oil and not the traditional 5. Are you positive the oil if at the full mark on the dipstick?
 

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Registered
2002 chevy trailblazer_lt
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438 Posts
Just had the oil changed,Valvoline 5w30 ac delco filter two days ago.
affermative on 7 Qts of oil and tripple checked the dip stick.

thinking about putting in some seafoam or Kerosene to clean out the possiable gunk.
then changing oil and filter again.
Did the oil pressure problem occur before the oil change? Are you sure they changed the filter?
 
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