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Chevy TrailBlazer Transmission Problems



  • wags2wags2 Posts: 7
    If i remember right it should be your.Transfer Case Endoder Motor. Get them to diagnose to be sure,them check out these two E-bay auctions Item number: 220052440673 and Item number: 270060824717 here is a good start!!!
  • Ok I've been reading through most of these posts and it doesn't look good. I am regretting buying this 02 Trailblazer now. I've had it for 2 years now and it has 47,000 miles....purchased it with 35,000 miles so obviously i dont do a whole lot of driving with it so to have these kind of issues that quick is not a good sign. Here's a list of my issues:
    1) About 4 months ago it started making clunking sounds when in A4WD and it felt like the wheels were slipping.
    2) Clunks real bad when shifting down from 2nd to 1st at a stop in A4WD. Can only drive it in 2HI now just for fear of something breaking although 2HI is starting to feel sloppy.
    3) After about 45 minutes of driving, come to stop and start to go again and hear a creek for a few seconds
    4) Yesterday, started it up and 2HI light was constantly blinking and it would blink in any other gear i put it but would not actually change over.

    Now I bought this GM CERTIFIED and thought that would be the best way to go on something used. I guess I was wrong. Warranty is up, I have a newborn on the way and do not want to get stranded with this vehicle. I cannot afford $3k in repairs and owe more than the vehicle is worth. I really do not want to get stranded on the side of the road with my newborn when the transmission goes.

    I guess this is just a little rant if anyone has any input?

  • wags2wags2 Posts: 7
    Your issues are the same reason GM CERTIFIED don't mean crap when they don't back it up.The only reason i bought the TB is for the 3rd row seat and didn't want to spend 30k on a B9 Tribeca.Maybe GM should merge with Ford and they can bask in there quality issues and we will just buy from Subaru Honda and Toyota and they can analize the product and the reasons why the quality is so much better.
  • hardhawkhardhawk Posts: 702
    Your flashing selector switch lights could just be a bad switch. I leave my selector in 2HI unless there is snow or something and then I use A4WD. Mine is a 2002 Envoy that I have owned for 5 and a half years. It has has some minor issues but overall has been a reliable vehicle. Never had anything that left it stranded. I did have the selector switch replaced when it flashed weird like yours. The biggest story I have seen is the sunshell part in the transmission. When it goes it goes. But,knock on wood, I have yet to have this issue arise in almost 60,000 miles of driving, some of which involves towing a 5000# boat and trailer. Don't get too wigged out just yet. Our Envoy is my wife's primary car and I have no worry about her and the kids being in it at all. The clunking could be a number of things, none of which would involve the transmission. Could be a CV joint or could be nothing at all. I know sometimes in 4WD mine will clunk if I turn sharply or one wheel is slipping on snow or ice. The ABS system makes clunking noises when activated, as does my limited slip rear axle, usually during slippery conditions. I think you will find that the vast majority of triplet owners have had pretty reliable vehicles. The ones that are bad however, have been really bad! Hope this helps.
  • I bought my trail blazer BRAND NEW 2004. I am a sales rep and i needed a reliable car for work. I parted with my car of 13 years (a toyota)for a Trail blazer and it has been nothing but HEADACHES.
    Within several months the cruise control broke, then the radio went silent after getting that fixed it went back in b/c the gages were shooting up and down even when i was in park. This is not suppose to happen to new cars.
    As if these problems were not enough the car just started to turn off. This problem started first only when i had the air conditioning on, then the heat now everything could be off and the car still cuts off. At first the car would warn me to cut engine, now - no warning. I brought it to the dealer to get fixed like always - "wow we never had this problem before, let us fix it". then poof a couple of days later i get the car and like clock work days go by my service engine light goes on (never to turn off) and the problem still exists. Now that i am past warranty i refuse to pay for something they can not or will not fix. This is were it gets interesting one day (of many) while i was at the dealership, one of the sales managers whispered to me "get rid of it trade it now, trust me". So i am going in this weekend to do just that.
    Oh did i mention the brakes started to squeek two days into owning it and they have ever since - they said all semi metallic brakes do that and there is nothing we can do about it.
    So sad b/c I really do love my TB too bad it's crap.
  • Well I ended up calling the customer service # i found on here. They opened up a case file but would not own up to any "silent" recall for the transmission or anything. The best they could do was tell me to call my local dealer and schedule a full diagnostic which i have to pay for of course. I forgot to mention one other problem: Mirrors go crazy whenever i start the truck, but that is the least of my problems. With so many people having problems with these vehicles, isnt there some kind of class action possible?

  • hey i was the one that posted the "silent" recall....they will own up to need to call c/s back and have them schedule the diagnostic check for you and tell them you arent paying for can tell them you took it to your mechanic and he said its the sunshield....thats what i did and she told me i had to have them (GM) check it so i said fine make the appt but im not paying for it...and then when i called the dealership to confirm the appt i told them i wasnt paying for the diagnostic check that GM said they would pay for it. i really do believe it depends on where you bought your truck, if its a family dealership. i do believe i got lucky on that one.....oh and i cried. if it wasnt for the dealership standing behind me with GM i might still be waiting to hear from GM about whether they would pay to fix it or not. i also get the constant squeeking of the personal mechanic has checked the brakes twice and there is nothing wrong with them.
  • I just took my 05 in for a similar problem, (kept shifting from 2HI into AWD, instead of 4LO). The problem was in the computer module. I'm not sure how much it was to replace the part due to the vehicle being under warranty, but it was a pretty quick fix, less than an hour...
  • This is lengthy but worth the time. It’s time to force a recall since GM isn’t going to step up to the plate. My last GM purchase has been made, however I want reimbursed and ensure the safety of other Trailblazer owners!!!!!

    -2002 Trailblazer LT 2WD
    -Transmission failure at 78,000 miles
    -Near accident with two children in car ages 2 and 7
    -Major repair cost
    -Significant safety problem
    -Multiple listings of identical failures (sun shell/ reaction gear) planetary system.
    -Reportedly known defective and (under designed) part. This will be the NHTSA’s responsibility to investigate and sort out.
    -Some reports of “silent recall” however never acknowledged with my conversations
    -No warning of oncoming failure
    -Owners manual doesn’t recommend any transmission service until 100,000 miles
    -Never towed anything
    -Wife driven/ garage kept
    -Significant engineering accomplishments in transmissions have been made in the past decade with materials and lubricants. There is absolutely no reason a tranny should fall apart on an automobile towing or not under 100,000 miles especially if your following the manufacturers maintenance recommendations

    Read on if you have time.

    On 10/26/06 while traveling with my two children( 2 and 7) the transmission failed in my 2002 (TB)Trailblazer LT. I was merging into 40~45 mph traffic from a side road, there was more than adequate time to enter traffic and accelerate to traffic speed before oncoming traffic would approach. Entering the intersection I heard and felt a heavy clunk in the rear of the TB and immediately following a horrendous screech and whine (transmission failing). I immediately checked the rear-view mirror since I was now in quickly approaching traffic with no power. The engines RPM’s raced and I let off the gas and then slowly re-applied the gas and the transmission caught (worked), however I could only get the SUV up to about 20mph fearing engine problems because the tranny wouldn’t shift gears and engines RPM’s were racing. At the same time I yelled at the kids to hold on because it looked like the approaching car wasn’t slowing down. ( I assume they saw me enter traffic and presumed I would be at traffic speed by the time they approached). For the second time I heard a horrendous screeching this time the tires of the car behind me. I’m certain that car would have hit us had they not managed to swerve slightly to the right rear of my TB. I managed to slowly drive the TB to the closest Chevrolet dealership, fortunately only a couple of minutes away, and getting the finger from every pissed off Black Friday shopper in the city. Left the TB with dealership and tried to deal with two children and transportation arrangements.

    The service department called me back with preliminary diagnosis (blown transmission) metal shavings in the transmission oil and no reverse. They would not do a complete break-down because they were aware of similar problems plus the additional cost of a full breakdown analysis. The sun-shell “grenades” per the technicians words. I told them to go ahead and replace the transmission since I could not afford to be without a vehicle (which ended up costing me an arm a leg and another leg, plus 7 days ) even after GM paid 30%. I didn’t have the money to cover this but the worse of the two evils was to be without a vehicle.

    After doing extensive research on the subject it is easy to find that there is definitely a faulty part and a significant safety issue here. Google this for instance: “2002 trailblazer transmission problems +sun gear”. The only thing preventing a full re-call in my thoughts (being an engineer myself) is the huge cost to the manufacturer to recall and replace/repair this problem and most importantly there has not been an injury to date (at least not reported). I am certain Chevrolet/GM is fully aware of the problem based on my research and they are sitting on the problem until they are forced to make a recall, I pray that it is not at the expense of someones life. To see over 81 complaints actually registered with the NHTSA within a narrow search criteria go to:
    use the vehicle search +
    Year : 2002
    Make : CHEVROLET

    Some of these complaints do not match my problem but there are TOO MANY that have exactly the same phenomena as I have described (think of how many people just don’t pursue this problem).

    Read on if you want to know about my Customer Service conversations.

    Customer Service experience:
    Talked to a Customer service manager and took general information details etc…, Immediately transferred me to Specialist (maybe because I mentioned silent recall). Specialist went over details I gave to first person and was very apologetic, however never admitted or denied to the silent recall. Scheduled a follow up phone discussion for two days later after she had time to review the material. Received a phone message that the specialist would not be able to keep appointment because of promotion however she had advanced the issue to the next level district manager to see if they “couldn’t get this covered” (still have the recorded message). Got a call on 10/29/06 TB was fixed, asked if they heard anything from GM Cust. Serv. (no). Told them I would have to wait until I heard from them before I proceeded. Called back several times with no return phone call on 10/29/06 because TB was ready. Tried again on 10/30/06 and finally got specialist around noon that day. Specialist said they had reviewed the material and decided to cover 30% of the charges, to which I questioned the obvious known defect and unquestionable safety issue, along with requesting 100% coverage. This transmission was only at 75% of the mileage before they recommend the first service. The specialist just sat there and listened and never gave any answer just that they had made there decision. At that point I suggested they contact the dealership and ensure the paper work was handled, I needed the car today. Of course I called the dealership before I left work for the day to confirm the paper work was handled and it was not. Immediately called back specialist (this, 4 hours after our initial conversation) and she said she had just talked to them and everything was okay. Demanded she have the District manager call me since he was involved with the decision, to which she said she would put in the request. Called back dealership to confirm and they said still waiting on final decision, so I had to wait until 10/31/06. Talked to dealership on 10/31/06 and still hadn’t finalized with cust. Serv. At this point I’m livid and demand an immediate answer. Dealership calls back shortly and says car is ready and with appropriate paperwork. Got my car and left , never received a call from district manager.

    Make your complaint known to the NHTSA, and then
  • I agree. I had the same grinding noise coming from my left front wheel when hard turning right. Then, there was a noise coming from the front left in normal driving.

    Changed the front wheel hub assembly this morning. Actually, quite easy. Do I love american cars and trucks for this. I am not a mechanic and it took me about 2 hours. If you are going to change this yourself, make sure you shop around for your parts. I went 2 parts places and one quoted me 307 + tax. This is in Canadian dollars. The other one wanted 1200 for the same part. I did not dare going to the dealer to find out how much would have been this job.
  • 10 bucks says you need a "transfer case shift control module", otherwise known as a TCM. There will be a code stored in your computer if the TCM has failed, or the technician will tell you thet there "is no communication" with the TCM. The part lists for about 250.00, and the dealer shouldn't charge you more than an hour labor. I work in the parts dept of my local Chevy dealership, and I just had to replace the TCM on my 02 TB 4WD. Also, a bad TCM could VERY negatively affect your gas mileage, as it could be shifting into AWD or 4WD without your knowledge as you drive. My mileage decreased by about 25% until I had my TCM fixed. Good luck!
  • I would like to know how message 188 resolve her problems with GM in order for her to get a new transmission for only 250.00 dollars. I just experience the same problem as she did and I would like to see if I can get some advise from her. Please let me know.

    I have a call in to GM and I am at a stand still right now. I would just like to know what words you told them that may help me out in getting the deal that you received.
  • I would like to know what exactly you told GM in order to get the great deal you received. I just experience the same problem you did and I did make to the call to GM and I am just at a stand still. Is there any advise you can give me? Thanks
  • cbaileycbailey Posts: 3
    I explained to them sound I heard and the behavour of the transmission. I told them that through research I believed the sun gear was the issue. They didn't acknowledge they knew what the sun gear was, but they kept recommending that I take it to my selling dealership. I did and I told them the same story I told GM rep. The dealership dove into the tranny found it was the sun gear, then they called GM and brought the offer to me.

    From what I have read online & experienced, it seems that having an understanding dealership that values your past and possibly future business is key to getting a good deal.
  • I had to have the tranny cooler lines replaced last summer.They were rotted. Anyone else have this problem? Or could it be just from my harsh winters. 2003 TB 66,000 miles.

    I just started having a problem when shifting from 2WD to A4WD. It sounds like the u-joint is going to fall apart. No problems in 2WD or in 4HI.

    At what point will GM have to do a recall? It seems like there are a multitude of problems with TB Transmissions.

    THanks in advance.
  • jworkmanjworkman Posts: 27
    I posted a message waaay back about my tranny lines....the exhaust actually burned a hole in mine.

    I recently replaced the trafer case control module on my 02 TB LT 4WD after getting stuck in a PARKING LOT this winter. I was not very impressed with the 4WD capabilities of the TB....seemed like the 4WD would engage for a second, but then slip 4HI or LO. Replacing the TCM made a WORLD of difference in 4WD traction, and fixed the crummy mileage I had been getting for a while too. I believe the faulty TCM was engaging AWD at highway speeds without my knowledge.
  • rll3rll3 Posts: 1
    My tranny went out and I replaced with a used tranny and it didn't work. I was told that sometimes the computer won't recognize the tranny. I disconnected the battery and reconnected didn't make any difference.
  • I bought mine used in 2003 with 26000 miles, and just traded it in for a 2007 Honda Civic. Saving $190 in gas, alone, each month.
    I loved the truck at first, but right before I traded it in at 80000 miles, I began running into a slew of problems (tranny, ball joints, AC working sporadically, half the fan speeds did not work, multiple replacements of tail light bulbs (after recall fix,) 2 new water pumps, fan clutch.....ugh. I was glad to be rid of it for $700 more than I owed. I have owned two Fords that had 120K+ miles when I traded them in, and a Isuzu Trooper with 190K miles when it finally died. What happened to GM vehicles, I'll never know. I certainly won't be buying one again, however.... :sick:
  • shannonvshannonv Posts: 1
    I just replaced my 4wd switch not too long ago and the switch itself was only $25. All together to have the dealership fix it was $120. Like you I have had alot of recalls done on my 2004 TB, but luckily the 4wd switch was the first problem i've had.
  • cubbycarrcubbycarr Posts: 1
    I have a 2003 TB 2wd and the transmission is having problems at only 50000 miles. Also the fan clutch and O2 sensor had to be replaced. My auto starts out in 2nd gear and at highway speeds it won't stay in overdrive. It hunts for the right gear. My dealer thinks it's a valve in the transmission. It's going to cost about $1600.00. After reading all the other replies on this site I think it's a manufacturer defect.
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