will not shift past 2nd gear?

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DRKSTW
  • MEMBER
  • 1 POST
My trailblazer will not shift past 2nd gear, and my speedometer does not read accurately all the time
May 14, 2008 at 3:08 PM
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KASEKENNY
  • ✓Experienced Mechanic
  • 18,907 POSTS
More than likely this is a speed sensor issue.

So, let's start with testing a speed sensor using this guide. This guide is for a wheel speed sensor, but the process is the same.

https://www.2carpros.com/articles/abs-wheel-speed-sensor-test

Please run through this and use the info below from the manual to do this testing and replace it if needed.

Let me know if you have questions. Thanks
Mar 15, 2022 at 1:39 AM
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