2005 Buick Lacrosse, Repeated ECM Failures

In two previous articles I outlined the problems and solutions on a 2005 Buick Lacrosse.  Symptom  and Solution. Now for the root cause of this failure. In every case that I found, similar to the vehicle I was working on was that the condition was preceded by a battery event. Most notably loose and corroded … Continue reading “2005 Buick Lacrosse, Repeated ECM Failures”

2005 Buick Lacrosse, U1300 Follow Up Testing

This repair information is an addition to a previously published article. To see that article please click here. The code U1300 turned out to be the most relevant code but SI was severely lacking in background information. SI states that the code U1300 can only be seen as a history code. The U1300 was stored … Continue reading “2005 Buick Lacrosse, U1300 Follow Up Testing”

2005 Buick Lacrosse, Gauges Do Not Work

This 2005 Buick Lacrosse came in with the complaint that the instrument cluster gauges would  not work and the T/C , traction control light stayed on. . The customer stated that the air conditioner would have to be turned off and then back on before it would get cold. Through a little bit of research … Continue reading “2005 Buick Lacrosse, Gauges Do Not Work”