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How to Determine the Correct T-One Wiring Harness For a 2021 Chevrolet Trailblazer  

Question:

Which wiring harness # is compatible with my 2021 Chevy Trailblazer LS,1.2 engine. I noticed there are 2 different harnesses, one for regular lights and one for LED lights. My owners manual says there are both LED and regular bulbs in my vehicle. Very confusing. Thanks.

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Expert Reply:

The correct harness is dependent on specifically the taillights in your 2021 Chevrolet Trailblazer.

If the taillights are LED's then you would use the T-One Vehicle Wiring Harness # TK26VR.

If your taillights are not LED's then you would use the T-One Vehicle Wiring Harness # TK39FR

Your Trailblazer will have both types of lighting, but the only one you need to be concerned with are the taillights specifically.

expert reply by:
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Scott S

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