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

11,555

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 .

11,555

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 1,155 nationwide Trailblazer listings starting at $18,495.

Postal Code:

CarGurus Experts

  • #1
    FJ4072
    Reputation
    7,680
  • #2
    Gene Arnett
    Reputation
    3,180
  • #3
    bigdogracer
    Reputation
    2,750
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Equinox
69 Great Deals out of 2,789 listings starting at $2,499
Used Chevrolet Tahoe
16 Great Deals out of 717 listings starting at $5,995
Used Chevrolet Silverado 1500
229 Great Deals out of 5,924 listings starting at $3,995
Used Jeep Grand Cherokee
125 Great Deals out of 3,270 listings starting at $4,995
Used Toyota RAV4
107 Great Deals out of 2,082 listings starting at $3,499
Used Honda CR-V
87 Great Deals out of 3,900 listings starting at $1,995
Used Chevrolet Malibu
46 Great Deals out of 1,150 listings starting at $1,495
Used Ford Escape
148 Great Deals out of 4,559 listings starting at $2,995
Used Ford Explorer
85 Great Deals out of 2,036 listings starting at $2,999

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.