Where is upstream oxygen sensor

50

Asked by GuruPBGG5 Apr 21, 2020 at 12:26 AM about the 2007 Chevrolet Trailblazer LT RWD

Question type: Maintenance & Repair

I had codes read and it says to replace upstream
oxygen sensor (bank 1 sensor 1). I've searched
online looking for videos or pictures to show me
exactly where it is but found nothing and
shockingly the owners manual does not mention it.
Can anyone help me out with its exact location.
And maybe it would help if you all knew it's an
inline 6 engine.

4 Answers

11,155

Passenger side, look down below the exhaust manifold, it's right there. Soak it with PB Blaster.

50

If it is the sensor closest to the cab of the truck and down toward the bottom of the engine then I have found it. Thanks for the help guy's. But I'm still very surprised that my owners manual didn't mention a single word about oxygen sensors .

11,155

Yep, that's it, fairly easy one to do if it's not stuck on there. The normal sized o2 sensor socket tends to hit the fender there. If it is stuck, I've had luck with propane torch, then freeze spraying the sensor right after. Only thing that worked.

Your Answer:

Trailblazer

Looking for a Used Trailblazer in your area?

CarGurus has 17,898 nationwide Trailblazer listings starting at $2,000.

ZIP:

Own this car?

Share your experience with others.

2007 Chevrolet Trailblazer

Review another car

CarGurus Experts

  • #1
    FJ4072
    Reputation
    7,430
  • #2
    Gene Arnett
    Reputation
    3,160
  • #3
    bigdogracer
    Reputation
    2,730
View All

Know more, shop wisely

Search

Related Models For Sale

Used Chevrolet Tahoe
1,056 Great Deals out of 21,466 listings starting at $3,700
Used Chevrolet Equinox
2,146 Great Deals out of 49,918 listings starting at $1,549
Used Ford Explorer
2,016 Great Deals out of 59,138 listings starting at $999
Used Jeep Grand Cherokee
2,231 Great Deals out of 45,045 listings starting at $800
Used Toyota RAV4
1,828 Great Deals out of 31,865 listings starting at $1,950
Used Chevrolet Silverado 1500
3,887 Great Deals out of 131,035 listings starting at $2,390
Used Ford Escape
2,026 Great Deals out of 43,029 listings starting at $995
Used Honda CR-V
1,733 Great Deals out of 38,648 listings starting at $1,450
Used Dodge Charger
694 Great Deals out of 38,761 listings starting at $1,600
Used Ford F-150
5,525 Great Deals out of 122,198 listings starting at $1,995
Used GMC Acadia
844 Great Deals out of 16,035 listings starting at $1,992

Used Cars for Sale

2024 Chevrolet Trailblazer For Sale
3 Great Deals out of 11,744 listings starting at $18,790
2023 Chevrolet Trailblazer For Sale
97 Great Deals out of 2,632 listings starting at $18,607
2022 Chevrolet Trailblazer For Sale
76 Great Deals out of 998 listings starting at $16,995
2021 Chevrolet Trailblazer For Sale
131 Great Deals out of 2,120 listings starting at $14,950
2009 Chevrolet Trailblazer For Sale
18 listings starting at $3,499

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.