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”

2002 Buick Rendezvous Water In The Tail Light Assembly

This 2002 Buick Rendezvous came in with the complaint that the left rear turn signal did not work. Also the stoplight and the tail light on the left side did not work. Well three inches of water and the glass part of the light bulb in the bottom of the tail light assembly was pretty … Continue reading “2002 Buick Rendezvous Water In The Tail Light Assembly”

2002 Buick Rendezvous No Run Condition

This 2002 Buick Rendezvous came in with the complaint that it would not run at times. Started out just a problem sometimes but now it is most of the time. I checked for codes and the only one present was for a fuel level sensor. I checked fuel pressure and spark and they were both … Continue reading “2002 Buick Rendezvous No Run Condition”

2009 Buick Lacrosse Interior Light Fuse Blows

This 2009 Buick Lacrosse came in with the complaint that the interior light fuse blows. The fuse is located in the passenger side interior fuse box. there is a cover on the end of the dash that covers the fuse box. I confirmed that the interior light fuse was blown. The fuse should be labeled … Continue reading “2009 Buick Lacrosse Interior Light Fuse Blows”

2005 Buick Lesabre, Changing The Gauge Stepper Motors

The gauge stepper motors had failed in this cluster. If you need to see how to remove the instrument cluster please click here. The first step was to remove the four screws and lever latches that hold the instrument cluster to the dash carrier. Then using a small screw driver to release the clips that … Continue reading “2005 Buick Lesabre, Changing The Gauge Stepper Motors”

2005 Buick Lesabre, Gas and Temperature Gauges Erractic

This 2005 Buick Lesabre Custom came in with the complaint that the fuel and temperature gauges were not working properly. Since the gauges had gone way past the high marks and were circling back around, I was pretty sure the stepper motor in the gauges were failing. I did do some testing with my Tech … Continue reading “2005 Buick Lesabre, Gas and Temperature Gauges Erractic”

2004 Buick Century, Battery Goes Dead

This 2004 Buick Century came in with the complaint that the battery would go dead overnight. I disconnected the battery negative cable and connected my trusty Fluke multimeter in series between the negative battery post and a good chassis ground. I had already set the meter up to read DC amps. One lead was in … Continue reading “2004 Buick Century, Battery Goes Dead”

2002 Buick Century, Idles High

This 2002 Buick Century came in with the complaint that the idle speed was higher than it was supposed to be and sometimes it was very high. I looked the car over and saw that a new IAC valve and and new TPS had already been installed on the engine. I did a quick check … Continue reading “2002 Buick Century, Idles High”