2001 GMC C2500 no codes

2001 GMC C2500
96,000 MILES • V8 • 4WD • AUTOMATIC
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ECCCA
  • MEMBER
  • 2 POSTS
I went to my local auto parts store to have them read the computer and it shows nothing at all. We checked all the fuses and all were fine. We went to his car to check if the scanner was bad and it read his with no problems. It will not read anything. Any sugestions.
Aug 7, 2010 at 8:48 AM
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MMPRINCE4000
  • ✓ASE Certified Mechanic
  • 8,548 POSTS
  • ASE Certified Mechanic
The diagnostic connector is a fused circuit, so if scanner will not connect, fuse is bad.
Aug 7, 2010 at 8:54 AM
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ECCCA
  • MEMBER
  • 2 POSTS
I did check all fuses and they are good. Could the computer gone bad.
Aug 7, 2010 at 10:48 AM
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MMPRINCE4000
  • ✓ASE Certified Mechanic
  • 8,548 POSTS
  • ASE Certified Mechanic
Yes it is possible the PCM is bad, dealer or well equipped garage can test PCM.
Aug 8, 2010 at 8:34 AM
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