The computer port on my GMC truck does not work. Can't read codes, code reader says "No power!"

Asked by May 02, 2017 at 09:52 AM about the 2003 GMC Sierra 1500 STD Standard Cab LB

Question type: Maintenance & Repair

The check engine light is on  my 2003 GMC. The computer port inside the truck has no power to it. Is there a fuse on this circuit or was that optional equiptment on my base model truck? It has a 4.3L V6

2 Answers

67,965

There is a fuse and many times it is the cig. lighter (power port) fuse.

2 people found this helpful.
Best Answer Mark helpful

Thanks for your help. My cig lighter won't work either, so maybe that is the reason. Thanks again!

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