shifting irratically

2002 CHEVROLET SILVERADO
145,000 MILES
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GERV59
  • MEMBER
  • 4 POSTS
When I have it cruise at 60 mph the the rpms will bounce around from 1600 to 2600, up and down. It seems to shift okay if I just keep it in 3 gear or keep it on Towing. Is this the transmission or is there some kind of sensor that may be going out?

Thanks.
Nov 17, 2011 at 1:42 AM
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