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Uplander/Montana/Relay/Terraza TSBs and Problem Codes



  • gmcustsvcsarahgmcustsvcsarah Posts: 1,964
    Hello acdmum,
    I'm sorry that your Uplander has been encountering so many difficulties. I see that you did take this in to a dealership to have some work done on it for the ABS - if we can follow up on this with you, please send us an email to one of the addresses located in my profile (include your name/Edmunds username, phone and address, the last 8 digits of your VIN and current mileage, and the name of your dealership). My coworker Christina, who answers inbound emails from the forum, will advise you further.

    All the best,
    GM Customer Service
  • rriprrip Posts: 4
    Hello Sarah from GM,

    So how does one send you an email when your e-mail address is marked as "private"?

    My 2006 Buick Terraza (same body as the Uplander) started its ABS trouble right after the warranty ended. I have not taken mine into a dealership because I cannot afford to pay megabucks to fix this lemon.

    Will GM make good on a flawed ABS system in a car that is out of warranty?
  • gmcustsvcgmcustsvc Posts: 4,055
    Thank you for your message. Edmunds is working to fix the concerns with Sarah's profile. I apologize for your frustrations. I understand your concerns and would be happy to set up a case for you with GM Customer Assistance; however, we will require that you have the vehicle diagnosed at a GM dealer. From there we can look into your concerns and frustrations. Please feel free to email me with the name of the dealer you will be working with, your VIN, and current mileage. I look forward to your email.
    GM Customer Service
  • Sorry! It seems I have nothing new or exciting to report. Just another Uplander having the ABS and Traction Control warning light problem. I was hoping to find an easy fix for what I thought would be a rare occurrence. After reading the messages I now know this will not be the case.

    Hey Sarah, you have time for one more happy satisfied customer? Please advise on what information you need and how to send.

    Thank you
  • Has anyone actually gotten a satisfactory outcome from "Sarah" or anyone at GM Customer Service? I've gone ten rounds with them and gotten more of the same company line. Here's the latest:

    I filed complaints with BBB and the Attorney General (the car is still under powertrain warranty, and this is a powertrain problem). I received a call from customer service, who asked me when I bought the car and what the current mileage was. THAT's ALL... nothing about the problem, the dealer experience, nothing. They told me they were required to call the customer when they got a complaint and that's what they were doing. What kind of joke is this? It's as if they're automatons who read from a script, but are incapable of independent logic, thinking or empathy. All I want is a safe vehicle that I can register with license plates when they come due. I can't even do that right now because of the engine problem. The traction control/stability control problem (unfortunately) is a luxury for me right now (along with the suspension clunk, the turn signals, the rear wiper (new problem). What a piece of junk! More importantly, what a poor, ineffective, uncaring, customer service organization!

    I'm not an unreasonable person, I like to think I'm well educated, the car is paid for. When I talk to customer service I don't raise my voice, curse, or call their ancestry into question. Heck, I used to work for GM so I'd like to think I have some sympathy for them. But then I remember why I quit my job there - because of stupid stuff like this.

    GM Customer Service - I'd love to hear a solution that works. What you've suggested before has been tried and failed. Why don't you try something new, like actually caring about the customer and addressing the problem once and for all instead of this constant runaround? :sick:
  • gmcustsvcsarahgmcustsvcsarah Posts: 1,964
    Good morning pos08uplander,

    Do you have a case number with us (71-**********)? If you wanted to get that our way, we'd be happy to get you any available updates. However, as this is now a BBB matter, I am very limited in what I can do at this point.

    I'm sorry to read that you don't feel as though we're addressing this properly at the moment. If I can get your case number (or the last 8 of your VIN), I can send a notification to your agent with any requests you may have.

    GM Customer Service
  • gmcustsvcsarahgmcustsvcsarah Posts: 1,964
    Good morning 3rdreacon,
    We'd be happy to look into this further with you. Please email us at with: your name and Edmunds username, phone and current address, last 8 of your VIN and approximate mileage, and the name of your involved dealership. My coworker Christina, who answers inbound emails from Edmunds, will advise you further.

    GM Customer Service
  • khriesikkhriesik Posts: 1
    I, too am having issues with these lights coming on. Mostly, they appear after the van has been idling while in park or at a stop light for several minutes. I've looked it up on other sites and one of the problems noted were bad wheel bearings, which were replaced about a year ago. It states that the harness on the bearings could be bad. One side were replaced at a dealership, the other side was done by my husband. However, if there are this many other people with the same issue, I doubt that could be the problem. Please let me know what steps we need to take to get this issue resolved. Obviously there is a problem with these vehicles. I had also had the problem with the passenger side sliding rear door not closing repeatedly and beeping and had that since the van was just 2 months after purchasing it (it's a 2006 and was purchased brand new). It took until just before the warranty was expired and me taking a video of it and showing it to the service department before anyone could "duplicate" the problem and believe me that it was really happening. We had purchased the van in another location than where we live, and I had even taken it there several times before giving up and finally taking it to our town. I find it ridiculous that it takes almost 5 years for a problem to be resolved. It got so bad that rivets were popping and I had to force close the door in order to make it drivable. Anyway, the issue now is the ABS/stability/traction lights. The systems still work, because as the lights had been on one time before, the traction control was engaged on a gravel road. Please advise!
  • gmcustsvcsarahgmcustsvcsarah Posts: 1,964
    Good morning khriesik,

    If we can look into this further with you, feel free to send us an email at (include your name and Edmunds username, phone and address, the last 8 of your VIN and current mileage, and name of your dealership).

    All the best,
    GM Customer Service
  • I'm at a loss here, any suggestions (in compliance with the law that is) are appreciated.

    I have a 2008 Chevy Ulander, which has been a problem since the day I bought it. It is still covered by the powertrain warranty. Current problems include:

    Service engine light (keeps me from registering or selling the vehicle, because it won't pass echeck)

    Transmission slippage

    Traction Control / Stability Control service light

    I've taken it to four different Chevrolet dealers, and they've serviced it at least twelve different times. NONE of the problems have been fixed. I also have a faulty turn signal indicator (not under warranty but they weren't able to fix) and a faulty rear wiper motor.

    Each time I've taken off work, I've imposed on my friends for a ride, and been without my car for an extended period of time. Did I mention NONE of the problems have been fixed? I filed a complaint with BBB and got a call from Chevrolet. Their response was "Well, we're required to call you and we did." Didn't ask anything about what was wrong, what had been done, or that NONE of the problems have been fixed. They seem content to play a waiting game and hope that I give up.

    Has anyone tried other options - for example, calling every news outlet in Ohio, or painting lemons on the car and driving in circles around their dealership? What about showing up with a film crew at the dealer and then posting it on Youtube? If any of those have worked I'd love to hear it. I won't take off from work and I won't do without my car anymore because NONE of the problems have been fixed.

    Thanks for the advice.
  • 4alexa24alexa2 Posts: 2
    I actually have my Uplander at the dealership now. I have the traction control, stability system, tire monitor system, and check engine lights on. I dropped it off at the dealership March 30th. After they changed the first part they called for me to pick it up. After signing the papers and getting my kids out of the car etc. My van was driven around the building to me. The service man leans out the window and asks me if the traction control light had been on. After I told him that was one of the reasons it was there, he had me wait on the lot with my kids while he drove around back to speak with the technician. He then came back around and ask if they could keep it a little longer. After not hearing anything again for a couple of days he called to say the problem was they had reset the lights incorrectly. He wanted to know if I would mind if they kept it overnight to drive it a bit more. Of course I said sure. Then after not hearing anything again even though I had been calling and getting no where. I was told the lights were back on and they had no idea why. I was told this evening after I called even though James had promised to call, that the problem was the brake pressure modular thing and they had ordered it and it should be in tomorrow. He also told me after I ask that this would in fact cause all of the lights. Is this accurate? It just doesn't seem right to me because the lights do not come on at the same time. BTW, GM is covering everything so far. I am at almost 94,000 miles.
  • pos08uplanderpos08uplander Posts: 8
    edited April 2012
    Hi 4alexa2,

    I'm an accountant, not a mechanic but I do have some common sense (moreso than the dealer's mechanics seem to have) - let me ask two questions:

    When the Traction Control and Stability Control lights are on, does the ABS (Anti lock Braking System) light come on?

    Do you have the Flex Fuel engine (it has a yellow gas cap)?

    My dealer told me the same story about the Electronic Brake Control Module, but this doesn't make sense. If it was bad, then all the systems that use it would fail (TC/SC/ABS). It's a shared part like a Christmas tree light - if one goes out, they all go out.

    On the engine light - does it come on during long trips, or when it's cold and damp? I've tried to explain to the mechanic that using e85 ethanol (sold at only a few gas stations in the country) will make the light go out. e85 runs notoriously lean (they use it in Indy cars) which means that it's probably my computer program telling the car to run too rich.

    Has GM given you a loaner while they experiment with the thing? That's been my biggest hangup with them - I'm willing to let them work on the car but I don't have another one to drive and I don't think I should have to pay for a rental for their incompetency.

    I look forward to your answers and keep us posted on the outcome. Thanks.
  • gmcustsvcsarahgmcustsvcsarah Posts: 1,964

    It sounds as though they've found the root of the matter; hope that the repair goes well! Please keep us updated on progress, and if we can be of any assistance feel free to send an email to

    All the best,
    GM Customer Service
  • 4alexa24alexa2 Posts: 2
    Yes, the dealership has given me a car to drive or else I don't think I would be so forgiving on the amount of time it is taking. I have also found out my van has been put to the side several times because apparently others are more important.
    To answer your other questions, yes it is the one that can take the flex fuel. I agree, after reading what everyone has said here and what I have been able to find elsewhere it seems everyone with the brake pressure modulator valve issue has an ABS light on. I don't. The lights I have are on everyday it seems, but they don't usually come on at the same time. Sometimes I can drive a bit before they start coming on.
    The first part they changed was under the intake and this is what GM covered.
    I was just informed this repair would be $1300. Thank goodness for extended warranties. I have 6000 miles left on it. I believe if they ever figure this out I will drive it straight to another dealership to trade it in!
  • jpfjpf Posts: 496
    GM seems to have a lot of problems with its Stabiltrak/Traction Control system across a variety of models (e.g. Impala). What's interesting is that there are Uplanders and Montana SV6s out there without the Stabiltrak/Traction Control feature. My 2007 Uplander doesn't have it and it's one reason why I bought it. Good luck.
  • Why all the hate people? Bought my Terraza brand new in 05'. Since then, other than breaks, tires and normal services - we have been running trouble free now for over 150,000 miles. I have a had a great experience, too bad they do not produce this line anymore :(
  • Wow, I read that wrong. I thought you said breaks (sic) and FIRES...

    Don't get me wrong, I agree that the U-van is a good vehicle in principle. Seating for seven, take the seats out and you can put a 4x8 sheet of plywood in the back. Towing for 3,500 pounds, front wheel drive and unibody provide a reasonably comfortable ride in snow, good visibility and decent gas mileage.

    My gripe is that I can't find a competent dealer to service it, and General Motors feels they have no further obligation once they build it. Four different dealers have worked on the thing and I have the same problems as when I bought it four years ago. Honestly, more than a dozen trips for the same problems which never get fixed? You'd be frustrated too if you got shuffled back and forth with no answer and no resolution.

    I've called GM in Detroit, and spoken to their representatives at the car shows. Their response is almost robotic - take it to the dealer (just like the other dozen times). There should be some sort of escalation process - "if this doesn't work, try this instead."

    Customer Service Sarah won't even reply to me, because she isn't empowered to make a decision that would resolve this problem. I'm not an unreasonable person, but insanity is doing the same thing over and over and expecting a different result. I've tried taking it to the dealer; Sarah, why don't you suggest something else?

    You're right, I'm a hater. I hate the way that GM and their dealer network have passed me back and forth; I hate the way they treat me like I'm stupid, gullible or both; I hate all the time I've lost and the money I've spent on repairs for ZERO results; and I hate that I paid tens of thousands of dollars for a vehicle that I can't renew the registration on because it won't pass e-check.

    No more GM vehicles, I've learned my lesson. You simply can't depend on them (their vehicles or their employees).
  • gmcustsvcsarahgmcustsvcsarah Posts: 1,964
    We're glad to hear that you have had such a great experience with your Terraza! Hope you get to enjoy many more happy miles in it.
    All the best,
    GM Customer Service
  • gadcinigadcini Posts: 2
    I have been having trouble with the traction control engaging randomly. Occassionally the service stabilization light and service aBs comes on. No light ever stays on. I have had it in the shop for weeks at a time and the problem never duplicates and no codes are ever stored. HELP. What can it be? Have replaced wheel bearings and awl sensor twice. New battery, power steering pump. And probably a few other things. I am at a loss. It is a death trap but I can't afford to purchase another vehicle.
  • susanssv7susanssv7 Posts: 3
    After taking my Montana V6 in for the 4th time to have the ABS fixed, they have replaced the system 3 times, (the last 2 times it was under warranty) they finally found a shorted out or broken wire half way through the wiring system. This seems to have fixed my problems.

    Although my traction control still grabs occasionally at stop signs my TC & ABS lights don't come on anymore every time I turn. Have them look for this. I have had it in so many times that the repair shop only charged me for parts, about $74. They have fixed A LOT of ABS problems on these vehicles.

    Good luck. I'm still trying to find a way to get my Engine light off. No engine problems but light will not go off. I've decided to keep my now for another year. I paid it off this month as was going to get rid of it fast. Too bad they have all of these problems because i do like the van otherwise.
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