2001 Chevrolet Express Comms Module Fuel Spark Gauges Working Right Ignition

2001 CHEVROLET EXPRESS
500,000 MILES
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no comms with any module. no fuel no spark. gauges not working right ignition module gets hot with key on
checked power and ground on pcm. checked ok replaced pcm worked ok 1/2 hour and did the samething
Dec 8, 2012 at 9:49 PM
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JDL
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About all I can tell you now is to check for voltage at pin 16 of datalink connector. Pins 4 and 5 are grounds.
Dec 8, 2012 at 10:42 PM
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