The question then is was the gauge reading correctly while he was looking at the sending unit input? If it was, any testing has to be done while the problem is occurring. That is where having your own scanner is better than having to pay someone by the hour to to try to make the problem occur. If the Body Computer showed it was reading a correct fuel level, then it becomes an issue of looking at what the instrument cluster is seeing for fuel level information that is sent from the Body Computer. Welcome to our world of frustration thanks to all this unnecessary technology.
One thing you might consider before getting too involved is starting with the 1996 models when the instrument cluster became an unreliable computer module, there have been a lot of problems caused by loose connector pins on the back of the cluster. Those can be soldered to the copper circuits to improve reliability.
Monday, March 21st, 2016 AT 2:42 AM