ABS light stays on on 2005 Buick Terraza

The ABS & TC light started staying on yesterday. This is the first time it doesn't stay off after I restart the car. How soon do I need to take it in and what should I expect

by in Newcastle, CA on April 13, 2010
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5 answers 2 comments
ANSWER by , September 25, 2010
This seems to be a common problem on these vehicles..I used a good sealer on the connectors to the front wheel sensors. Also, bent the brackets a bit so the wires and connectors do not contact the suspension parts at any time....So far, so good... Mike
ANSWER by , April 13, 2010
If the ABS Light is on, then you will not have anti-lock brakes, but the regular brake system will work normally, as long as none of the other brake lights are on. You should expect to pay for diagnosis time to look into this, normally 1 hour of diagnosis time.
ANSWER by , June 05, 2010
This happens on our 2005 Terraza also. One cause (expensive ~$375) was an intermittent sensor in the front wheel. The sensor is only sold as part of a full wheel bearing assembly. The other (not resolved) are issues with the Body Control Module (BCM). At the present time speed control fails in about 30 minutes, and then "service T/C" module displays. When we turn off car often it will work for another 15-30 minutes. Of course when we go to dealer (only place that can access BCM) it doesn't show fault, but comes with a 1hr diagnostic charge each time... Good Luck
COMMENT by , September 19, 2010
have a terraza mini van - 2005 - purchased in October 2005. March 2007 had to replace ALL 4 tires. The again in January 2009 - at this time - was told that the sensor in the Hub Bearing was bad and the whole Hub Bearing assembly had to be replaced. Replaced both - left and right. (ABS) light started coming on afterwards. Shop replaced the Hub Bearings again. Now October 2010 - need 4 new tires AGAIN - and (ABS) lights on AGAIN. replaced one Hub Bearing Assembly - and a couple of days later (ABS) on again! I have aligned all 4 tires several times, have the tires rotated almost every other or every 3rd oil change and have had the tires balanced. My tires are getting totally chopped up in about 18 months and the (ABS) light is a continuous problem. My van is headed back to the shop tomorrow - Monday, September 20th because the (ABS) light is on and the tires will HAVE to be replaced. Something else is wrong with my van - Something is tearing up my tires!!
COMMENT by , September 25, 2010
1st, "Service T/C" issue above turned out to be a wire cut when quarterpanel was installed. At 48000mi and post bankrupcy cost me another $400 (on top of about $1200 in mis-diagnosis). GRRR. 2nd you are right about wheel bearings being a common problem. At 52000 all 4 are bad. Dealer only part about $350/wheel. This is doubly bad considering that 2 of them were replaced as part of the ABS debacle. Tires/brakes/ wheel bearings seem mighty fragile on this vehicle. Baldo51
ANSWER by , February 28, 2016
I own a 2005 Terraza CX. I too have dealt with all these problems and painstakingly combed online forums for solutions. In my case, yes, the wheel bearings/hub assemblies all needed replacing and since replacing them, two were duds and needed replacing again within 4 months, thankfully under parts warranty. As for the abs/tc/stabilitrak lights, I ended up discovering it was the wire harness that connects from the wheel hub assembly to the van's computer. The wire runs along the control arms and over time all the flexing from turning the wheels left or right causes mini fractures in the wires. The wiring "appears" to look fine, but inside the insulated coating, the wiring is brittle and cracked - causing a short. So the lights come on sometimes, all the time, or sometimes don't come on at all. It can be very random or consistent too, making it hard to diagnose. Once I replaced the wire harnesses for left and right sides I haven't had a problem since. As for tires, I too chewed through a new set within a year and a half. So, I upped my game and bought a set of continental TrueContact tires, which are fairly new and sort of experimental, boasting incredible performance and longevity. I've had them over a year now - about 15,000km, and they still look near new and give me a nice smooth ride also they really kick ass on wet roads when before I always lost traction going up hills on wet roads in this stupid van now I can rip up them like an irresponsible teenager with a lead foot ;). So, overall, GM really screwed up and the wheel bearings can be expected to burn out regularly ... so either get rid of the van or expect this necessary evil. Aside from that issue I've made the best of my situation just by being online a lot to trouble shoot problems on my own. I've had other issues... stock radio sucks so I replaced with a double din GPS deck which requires a wire conversion harness behind the dash that had an amazing extra feature to let me mute the ridiculously sensitive side sliding door chime that would always ding for no reason - two birds with one stone, plus optional back up camera to help counter the poor rear visibility... so actually three birds with one stone! Apart from all that I do actually like this van. It's nice looking, great for hauling things and people, it just requires a lot of maintenance. :P Hope some of this helps anyone else out there. Cheers.
ANSWER by , December 06, 2010
dont worry to much evrithing is ok