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1st Generation Chevrolet (Chevy) Trailblazer, based on the GMT360 platform.

I’m having a Transmission issue

When I put my truck in drive it won’t change gears but if I manually shift my gears I have all over then and my speedometer doesn’t work

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@michaelmosley I'd suggest you have the OBDII scanned first. This sounds like an issues with the vehicle speed sensor.

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Michael mosley crwdns2934231:0crwdne2934231:0
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