Q: Chevy Solution on 2001 Chevrolet Suburban 1500

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I bought a 2001 Chevy Suburban that the computer is not reading when put on a machine. I was told it may have electrical problems but everything in the dash panel is working inluding message center. Could it be fuses? I also replaced spark plugs but it continues to vibrate a little. The warmer the motor gets the more vibrating and hesitating it does. Any idea what this could be since I cant get a read from the service engine soon light?
(2) Answers
The OBD Connector, which is where you connect a code reader, needs to have the wiring diagnosed. It should have power and ground to the connector, and a connection to the PCM. Here is a wiring circuit diagram and info about the connector:
Check the fuse panel. This is generally the problem in these subs, especially if you have connected (tapped) electric trailer brake module. It's a pain, but GM has no remedy for this prob. Just have to keep changing this fuse, mine does the same also!!