Tachometer not working properly

2005 CHEVROLET TRAILBLAZER
130,176 MILES • 3.9L • 6 CYL • 4WD • AUTOMATIC
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TAMMY MCMASTERS
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My rpm gauge reads almost 3,000 at speed of 70 mph and feels like it's not going into overdrive.
Feb 15, 2019 at 4:49 AM
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STRAILER
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Hello,

It does sound like the car is not going into overdrive. can I ask if the engine seems to have power? Can you please shoot a quick video with your phone so we can hear the noise? that would be great. You can upload it here with your response. Also, lets run the codes to see what comes up.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Please run down this guide and report back.

Feb 18, 2019 at 10:21 AM