'05 Trailblazer runs rough loss of power & oil pressure

Asked by Kim Jul 13, 2020 at 02:15 AM about the 2005 Chevrolet Trailblazer LS 4WD

Question type: Maintenance & Repair

I've replaced all spark plugs, checked
the injectors, vac lines, EGR, Volt. Reg.,
Alt. & wiring, comp. oil press. switch, &
ECM fuses... & butter my buns & call
me a biscuit, but NOTHING has fixed
the issue.

3 Answers

would there happen to be a hole in the exhaust somewhere? that can cause a loss of power


I dont see that u have replaced the fuel filter, on the other hand I would have the timing checked.


Hi there. We don't have an EGR on our platform. Have you cleaned the throttle body? Oil pressure loss could be bad, but most of the times it's the pressure switch located right above the oil filter. If it has oil on it, it's bad. I'd replace it anyway, cheap, compared to oil pump, outch!

Your Answer:


Looking for a Used Trailblazer in your area?

CarGurus has 9,881 nationwide Trailblazer listings starting at $1,733.


Sell Your Car Yourself

With a simple, secure transaction.


2005 Chevrolet Trailblazer LS 4WD

Private sale estimate


I have a different car

Chevrolet Trailblazer Experts

  • #1
  • #2
    G A Arne
  • #3
View All

Find great deals from top-rated dealersTM


Related Models For Sale

Used Chevrolet Blazer
60 Great Deals out of 10,978 listings starting at $2,299
Used Chevrolet Tahoe
617 Great Deals out of 21,618 listings starting at $1,950
Used Jeep Grand Cherokee
1,151 Great Deals out of 64,789 listings starting at $1,995
Used Chevrolet Silverado 1500
1,738 Great Deals out of 91,299 listings starting at $1,399
Used Chevrolet Equinox
1,148 Great Deals out of 82,442 listings starting at $1,495
Used Chevrolet Trailblazer EXT
4 Great Deals out of 262 listings starting at $1,950
Used GMC Envoy
17 Great Deals out of 516 listings starting at $2,050
Used Ford Explorer
1,085 Great Deals out of 65,619 listings starting at $750
Used Dodge Durango
430 Great Deals out of 20,427 listings starting at $999
Used Chevrolet Impala
335 Great Deals out of 11,666 listings starting at $1,200
Used Dodge Charger
587 Great Deals out of 27,143 listings starting at $2,995
Used Ford F-150
2,625 Great Deals out of 127,417 listings starting at $1,600

Used Cars For Sale

2007 Chevrolet Trailblazer LS 4WD For Sale
71 listings starting at $1,733

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.