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Speedometer quits working, AC will not work, trans will not shift

Tiny
TBAKER88
  • MEMBER
  • 1994 GMC C1500
  • 192,000 MILES
Sometimes when I start truck the trans will not shift out of low, can not turn ac on, and speedometer does not work, abs light on. Sometimes I can cut it off and restart it and all will work. I know it has to be a short but where?
Sunday, July 7th, 2013 AT 7:23 PM

1 Reply

Tiny
FREEMBA
  • MECHANIC
  • 1,152 POSTS
Check the fuses and relays to the affected systems. They could be loose of for some reason not making good connections.
The only place I've found for a bad connection is the PCM.
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Sunday, July 7th, 2013 AT 7:50 PM

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