Enter Vehicle Year Make Model

Specify your vehicle's year, make and model to guarantee fit.

Year
Make
Model
Options
Drivetrain

2003 Chevrolet Trailblazer EXT Knock Sensor

What year is your
Free Same Day Shipping

2003 Chevrolet Trailblazer EXT Knock Sensor

Filter Results
  • Notify When Available

    VIDEO

    98-06 GM Hummer Isuzu PU SUV Multifit 4.2L 4.8L 5.3L 5.7L 6.0L Knock Sensor PAIR

    Replaces 2003 Chevrolet Trailblazer EXT V8 5.3L 2 Piece Engine Knock Sensor Set TRQ ESA12268

    13 reviews
    Brand: TRQ
    - ESA12268

    • Quantity: 2 Piece
    • Kit Includes: (2) Engine Knock Sensors
    $36.95
    Save 23%
    List $47.95 Save $11.00

    Guaranteed to Fit 2003 Chevrolet Trailblazer EXT

    Guaranteed to Fit 2003 Chevrolet Trailblazer EXT

    Replaces 2003 Chevrolet Trailblazer EXT V8 5.3L 2 Piece Engine Knock Sensor Set TRQ ESA12268

    VIDEO

    98-06 GM Hummer Isuzu PU SUV Multifit 4.2L 4.8L 5.3L 5.7L 6.0L Knock Sensor PAIR
    13 reviews
    Brand: TRQ - ESA12268
    • Quantity: 2 Piece
    • Kit Includes: (2) Engine Knock Sensors
    $36.95
    Save 23%
    List $47.95 Save $11.00

    Guaranteed to Fit 2003 Chevrolet Trailblazer EXT

    Guaranteed to Fit 2003 Chevrolet Trailblazer EXT

  • Notify When Available
    Engine Knock Sensor

    Replaces 2003 Chevrolet Trailblazer EXT L6 4.2L Engine Knock Sensor TRQ ESA90017

    Brand: TRQ
    - ESA90017
    $24.95
    Save 32%
    List $36.95 Save $12.00

    Guaranteed to Fit 2003 Chevrolet Trailblazer EXT

    Guaranteed to Fit 2003 Chevrolet Trailblazer EXT

    Replaces 2003 Chevrolet Trailblazer EXT L6 4.2L Engine Knock Sensor TRQ ESA90017

    Engine Knock Sensor
    Brand: TRQ - ESA90017
    $24.95
    Save 32%
    List $36.95 Save $12.00

    Guaranteed to Fit 2003 Chevrolet Trailblazer EXT

    Guaranteed to Fit 2003 Chevrolet Trailblazer EXT

  • Notify When Available

    VIDEO

    Engine Knock Sensor

    Replaces 2003 Chevrolet Trailblazer EXT V8 5.3L Engine Knock Sensor TRQ ESA53623

    5 reviews
    Brand: TRQ
    - ESA53623

    $25.95
    Save 28%
    List $35.95 Save $10.00

    Guaranteed to Fit 2003 Chevrolet Trailblazer EXT

    Guaranteed to Fit 2003 Chevrolet Trailblazer EXT

    Replaces 2003 Chevrolet Trailblazer EXT V8 5.3L Engine Knock Sensor TRQ ESA53623

    VIDEO

    Engine Knock Sensor
    5 reviews
    Brand: TRQ - ESA53623
    $25.95
    Save 28%
    List $35.95 Save $10.00

    Guaranteed to Fit 2003 Chevrolet Trailblazer EXT

    Guaranteed to Fit 2003 Chevrolet Trailblazer EXT

  • Notify When Available

    VIDEO

    Engine Knock Sensor

    Replaces 2003 Chevrolet Trailblazer EXT V8 5.3L Engine Knock Sensor TRQ ESA90004

    Brand: TRQ
    - ESA90004
    $25.95
    Save 32%
    List $37.95 Save $12.00

    Guaranteed to Fit 2003 Chevrolet Trailblazer EXT

    Guaranteed to Fit 2003 Chevrolet Trailblazer EXT

    Replaces 2003 Chevrolet Trailblazer EXT V8 5.3L Engine Knock Sensor TRQ ESA90004

    VIDEO

    Engine Knock Sensor
    Brand: TRQ - ESA90004
    $25.95
    Save 32%
    List $37.95 Save $12.00

    Guaranteed to Fit 2003 Chevrolet Trailblazer EXT

    Guaranteed to Fit 2003 Chevrolet Trailblazer EXT

  • Notify When Available

    VIDEO

    Engine Knock Sensor

    Replaces 2003 Chevrolet Trailblazer EXT L6 4.2L Engine Knock Sensor TRQ ESA53630

    Brand: TRQ
    - ESA53630
    $29.95
    Save 30%
    List $42.95 Save $13.00

    Guaranteed to Fit 2003 Chevrolet Trailblazer EXT

    Guaranteed to Fit 2003 Chevrolet Trailblazer EXT

    Replaces 2003 Chevrolet Trailblazer EXT L6 4.2L Engine Knock Sensor TRQ ESA53630

    VIDEO

    Engine Knock Sensor
    Brand: TRQ - ESA53630
    $29.95
    Save 30%
    List $42.95 Save $13.00

    Guaranteed to Fit 2003 Chevrolet Trailblazer EXT

    Guaranteed to Fit 2003 Chevrolet Trailblazer EXT

  • Notify When Available

    VIDEO

    AC DELCO Knock Sensor 213-3521 Pair

    Replaces 2003 Chevrolet Trailblazer EXT V8 5.3L 8th Vin Digit P 2 Piece Engine Knock Sensor Set ACDelco ACEEK00030

    4 reviews
    Brand: ACDelco
    - ACEEK00030

    • Quantity: 2 Piece
    • Kit Includes: (2) Engine Knock Sensors
    $162.95
    Save 36%
    List $254.95 Save $92.00

    Guaranteed to Fit 2003 Chevrolet Trailblazer EXT

    Guaranteed to Fit 2003 Chevrolet Trailblazer EXT

    Replaces 2003 Chevrolet Trailblazer EXT V8 5.3L 8th Vin Digit P 2 Piece Engine Knock Sensor Set ACDelco ACEEK00030

    VIDEO

    AC DELCO Knock Sensor 213-3521 Pair
    4 reviews
    Brand: ACDelco - ACEEK00030
    • Quantity: 2 Piece
    • Kit Includes: (2) Engine Knock Sensors
    $162.95
    Save 36%
    List $254.95 Save $92.00

    Guaranteed to Fit 2003 Chevrolet Trailblazer EXT

    Guaranteed to Fit 2003 Chevrolet Trailblazer EXT

  • Notify When Available

    VIDEO

    ACDelco 213-3521 Knock Sensor

    Replaces 2003 Chevrolet Trailblazer EXT V8 5.3L 8th Vin Digit P Engine Knock Sensor ACDelco 213-3521

    2 reviews
    Brand: ACDelco
    - 213-3521
    $89.95
    Save 35%
    List $137.95 Save $48.00

    Guaranteed to Fit 2003 Chevrolet Trailblazer EXT

    Guaranteed to Fit 2003 Chevrolet Trailblazer EXT

    Replaces 2003 Chevrolet Trailblazer EXT V8 5.3L 8th Vin Digit P Engine Knock Sensor ACDelco 213-3521

    VIDEO

    ACDelco 213-3521 Knock Sensor
    2 reviews
    Brand: ACDelco - 213-3521
    $89.95
    Save 35%
    List $137.95 Save $48.00

    Guaranteed to Fit 2003 Chevrolet Trailblazer EXT

    Guaranteed to Fit 2003 Chevrolet Trailblazer EXT

  • Notify When Available
    Engine Knock Sensor - Delphi

    Replaces 2003 Chevrolet Trailblazer EXT L6 4.2L Engine Knock Sensor Delphi AS10260

    Brand: Delphi
    - AS10260

    $28.95
    Save 55%
    List $63.95 Save $35.00

    Guaranteed to Fit 2003 Chevrolet Trailblazer EXT

    Guaranteed to Fit 2003 Chevrolet Trailblazer EXT

    Replaces 2003 Chevrolet Trailblazer EXT L6 4.2L Engine Knock Sensor Delphi AS10260

    Engine Knock Sensor - Delphi
    Brand: Delphi - AS10260
    $28.95
    Save 55%
    List $63.95 Save $35.00

    Guaranteed to Fit 2003 Chevrolet Trailblazer EXT

    Guaranteed to Fit 2003 Chevrolet Trailblazer EXT

  • Notify When Available

    VIDEO

    Engine Knock Sensor - Delphi

    Replaces 2003 Chevrolet Trailblazer EXT V8 5.3L Engine Knock Sensor Delphi AS10017

    Brand: Delphi
    - AS10017

    Out of Stock

    $ 50.95

    Guaranteed to Fit 2003 Chevrolet Trailblazer EXT

    Guaranteed to Fit 2003 Chevrolet Trailblazer EXT

    Replaces 2003 Chevrolet Trailblazer EXT V8 5.3L Engine Knock Sensor Delphi AS10017

    VIDEO

    Engine Knock Sensor - Delphi
    Brand: Delphi - AS10017

    Out of Stock

    $ 50.95

    Guaranteed to Fit 2003 Chevrolet Trailblazer EXT

    Guaranteed to Fit 2003 Chevrolet Trailblazer EXT

Close



Same Day Shipping

Need your part faster? Choose expedited shipping at checkout.

Guaranteed To Fit

Highest quality, direct fit replacement auto parts enforced to the strictest product standards.

USA Customer Support

Exceeding customers' expectations, our team of passionate auto enthusiasts are here to help.

Instructional Video Library

Thousands of how-to auto repair videos to guide you step-by-step through your repair.

Go To Top
Specify your vehicle

Specify your vehicle's year, make and model to guarantee fit.

Year
Make
Model
Options
Drivetrain

If your vehicle isn't listed, close the window to return to search.