speedometer quits working, ac will not work , trans will not shift

1994 GMC C1500
192,000 MILES
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TBAKER88
  • MEMBER
  • 1 POST
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?
Jul 7, 2013 at 12:23 PM
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FREEMBA
  • ✓Experienced 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.
Jul 7, 2013 at 12:50 PM
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