Bulletins


BulletinBulletin dateReplacement BulletinItem no.SummaryAdded
POWER TRAIN
3609A3609B10018537Harsh 1-2 shift, malfunction indicator lamp illuminated, diagnostic trouble code p0894 stored in pcm. *tt01/05/2006
POWER TRAIN - AUTOMATIC TRANSMISSION
PIP-3366-B11/01/201110043185Cadillac/chevrolet/gmc/hummer: some suvs and trucks are exhibiting a condition where by grinding/ratcheting type noise coming from automatic transmission when shifting into park while in 4wd low (4lo) range. *pe02/29/2012
393109/28/20063931A10021018No movement when the shift lever is moved to d4 or d3. normal operation when moved to d2 d1 or reverse. *kb updated. *kb02/22/2007
33093309B10013548Investigation of extension seal leaks on 4l60e automatic transmission. *tt04/21/2005
31703170C10010577Harsh 1-2 shift. *eh12/01/2004
31363136A10010080The 4l60e/4l65e automatic transmission slip condition in 2nd, 3rd, or 4th gear. also to include the pontiac gto 2005. *tc11/04/2004
POWER TRAIN - AUTOMATIC TRANSMISSION - CONTROL MODULE (TCM, PCM)
306112/01/20073061F10023773Dtc c0327 with or without additional dtc's setting. with four wheel drive (4wd) only. *nj01/31/2008
POWER TRAIN - AUTOMATIC TRANSMISSION - COOLING UNIT AND LINES
PIT-472210/01/200810026804Gmc: fluid leak from transmission oil cooler lines due to corrosion. all 2000-2006 light duty trucks equipped with the light duty automatic transmission. *pe12/18/2008
POWER TRAIN - AXLE ASSEMBLY
0604200310/01/200610020950Revised rear axle fluid capacity and fluid level checking specification. *kb02/01/2007
371810019437Squeak, squeal or whistle noise from front axle equipped with 4wd. *tt03/14/2006
03041700212/01/2006030417002A10001111Whine noise from rear axle. *tt04/15/2003
POWER TRAIN - MANUAL TRANSMISSION
31363136K10021019Slip condition in 2nd, 3rd, or 4th. damaged 2-4 or 3-4 clutch. *kb updated 10/31/07. *nj02/22/2007
410810020876Transmission shift indicator adjustment. *kb01/25/2007
POWER TRAIN - TRANSFER CASE (4-WHEEL DRIVE)
05-04-21-00301/01/2008050421003C10017464Service 4wd light illuminated, diagnostic trouble code (dtc) c0374 set. *tt updated 10/05/07. *nj inspect wiring harness to transfer case speed sensors, replace wiring harness. updated 7/18/08 *pe11/08/2005
34243424A10017299Electronic transfer case unable to complete shift. *tt11/02/2005

Consumer Complaints


Fail datemilesoccurencesPurchase date
POWER TRAIN
10/31/2012120000
 Tl-the contact owns a 2006 chevrolet trailblazer. the contact stated that he noticed fluids leaking from his vehicle. the vehicle was taken to an independent mechanic for diagnosis. after diagnosis he was informed that the transmission coolant lines were corroded and needed to be replaced. the vehicle was repaired for the transmission coolant lines. the manufacturer was contacted and they advised him that there were no recalls on his vehicle. the failure and current mileages were approximately 120,000. tb
06/15/2011360004
 This has happened to me 4 times in the last year and a half first time at a red light it turned green i was the only car at the light when i hit the gas it felt like someone rear ended me look no one behind me then the rear brakes were locked up i drove it 1/4 of a mile and they unlocked them selves i drove to my dealer told them he looked it up said there was a service bulletin about that took my blazer in for a oil change an i supposed looked at the brakes then about 6 months later the same thing and it felt like some one rear ended me again but no one there behind me..then about a month ago in july the same thing at a red lite and i had 3 senior citizens in the blazer when they all thought some one ran into the rear of me but no one was behind me the rear brakes only stayed locked up maybe 300 yards and then released ..then today at a stop sign 8-16-2012 same thing then all kind of noise going to the doctors office about 1/4 of a mile away got into the parking lot an the drive shaft fell out at the front of the trans here both bars trailing arms at the rear axle broke had to have it towed the chevrolet dealership(greenwood) in austintown ohio i have 43000 miles on it and bought it new at greenwood chevrolet. *tr
08/01/2012610001
 Transmission cooler lines corroded through and started leaking. *tr
12/19/201059800
 Very hard, shocking 2-1 (maybe 3-2?) downshift after long drive as in 2-3 hours or under heavy load. such a hard brutal shift can lead to an accident. this is a very serious situation and it feels like you have hit something solid like another car. it is hard enough to completely jar occupants and dislodge glasses off of your face. you immediately lose about 5 mph. feels like it could cause complete transmission failure. it is very difficult to recreate this failure and it is so scary that you would not want to do it again.
01/09/201228752
 Without warning car would not accelerate when applying pressure to gas pedal, the motor would just rev up. i had to shift automatic transmission into lower gear to get it to go. i was able to drive to dealership by manually shifting transmission. service department inform me that transmission was shot and would need to be replaced for about $3,000.00 dollars. my 2006 chevy trailblazer has always been service at the same dealership and only has 28,783 miles on the odometer; i did not think that the transmission would fail with such low mileage. gm did say that they would cover the parts but i would be responsible to pay for labor. i realized that chevy did not offer 100,000 mile power train warrantees on trailblazers until 2007 but i believe that the transmission was defective from the start and chevy should be responsible to cover replacement cost
12/26/201184000
 The rpm guage stopped working today. the car hesitated and is acting not right. i have read of numerous people having the exact same issue. gm needs to do a full recall on this issue.
01/05/201156468
 The 2006 trailblazer had issues with the 2-wheel drive/4-wheel drive actuator and sensor. i had the sensor replace under warrenty because the indicator light on the actuator handle was in a different range than what the knob indicated. after replacement, the truck indicator light would occasionally change while driving. there were no warning lights lights indcating that there was an issue with the power train system. the transfer case eventually burned up due to continuous swithing between high and low hears while driving. the truck lost power while driving at 65 miles an hour in mountainous and snowy conditions. the tansfer case, and sensor and actuator were all paid my the car owner.
04/14/2010
 2006 chevy trailblazer. i have been told several time by the mechanic at chevy that the idler pulley is constantly a problem.
02/14/2009401
 Purchased used 38k miles problems started straight away reardoor locks quit, child safety lock rod fell off broken clip, would find plastic trim on ground next to car,seat trim broken fell off, when it rains or snows 4 wheel unit fail to engage and disengage correctly engine light comes on and goes out alot alternator is loud water pump went out ,rear chevy emblem popped off we now have 56k can't imagine what's next. *tr
01/20/20091
 I bought a brand new 2006 chevy trailblazer in jan. 19, 2006. on jan. 20, 2009 the 4-wheel drive component in the trailblazer quit working. now i am over the 36,000 miles - i have approx. 44, 000 miles on the trailblazer. the 4 wheel-drive will not work in 4wd hi, 4wd lo or automatic 4wd. i live in northwestern pa and need 4wd, especially the winter of 2009. there have been numerous occasions that i have slid on the road narrowly missing an accident due to not having 4 wheel drive. i called several dealers and asked if they had problems but was told one of two answers: 1. that's what happens when you buy a 4 wheel drive vehicle or 2. there's nothing we can do about it. i have never heard of this problem with any other model on such low mileage! *tr
POWER TRAIN - AUTOMATIC TRANSMISSION
06/02/201159601
 Pulling out on the road before oncomiing traffic and accelerated normal. the vehicle traveled about 10 to 20 yds when the engine rpm drasticly increased like the vehicle went into neutral, but the transmission was in d. it happened so quickly and before i could let my foot off the accelerator a very loud bang occurred in the driveline. i immediately let off the accelerator and began pulling out of the right lane of traffic on to the shoulder out of traffic. i attempted to increase acceleration with the vehicle in d and the rpm iincreased and no forward motion, shifted to 3 and tried again (nothing), shifted to 2 and then the transmision engaged and forward motion was established. took vehicle to gm dealer and results were a broken sprag in the transmission. gm rebuilt transmission to repair. discussed with serv mgr the problem and he indicated that they see these sprags break quite often in this type of transmission. doing further research after that i discovered that there are numerous occations of this vehicle with drive train problems in the transmission all throughout the veh mileage range from 4, 5000, 10000, and 34000 . vehicle service up to date by my dealership and has been driven under normal conditions. the engine is a 6.0 liter 395 hp, 400 ftlb torque. i also noticed where gm first produced this vehicle with a lighter duty transmission 4l60-e, then upgraded to a 4l70-e and larger torque converter to withstand the power developed by the 6.0 liter engine. ther gm serv. mgr indicated my vehicle had the 4l70-e transmission when i called him to discuss. there is still an issue with this particular circumstance with the heavier transmission not handllng the power developed. it is a safety hazard if quick acceleration was needed to cross an intersection or avoid oncoming traffic. fortunately i wasnt crossing traffic and turning from the parking lot onto the road able to avoid oncoming traffic avoiding a serious accident. trailblazer
03/01/2011505/17/2010
 2006 chevrolet trailblazer. consumer states problem with brakes and traction control light illuminating. *tgw the consumer the abs would activate when making right turns. several components were replaced, but the consumer continued to experience problems. the blower resistor was replaced due to it only working on high. the engine light illuminated, the fuel sensor was not working, the heat was inoperative, there were noise/creaks coming from the steering wheel when driving slow and making turns, the power windows and heated seats stopped working, the fuel gauge was inaccurate, the 4-wheel drive switch had to replaced, the seat belt was difficult to fasten, the head lights and tail lights sockets burned out, the fan for the heater and defroster stopped working, the transmission would not down shift properly and eventually had to be replaced, the ignition switch didn't always work and the key would sometimes get stuck. *jb
11/09/201034000
 Tl-the contact owns a 2006 chevrolet trailblazer. after stopping the vehicle she shifted it into park and removed her foot front the brake pedal. after she removed her foot from the brake pedal the vehicle surged forward until she reapplied pressure to the brake pedal. once the vehicle stopped she noticed the instrument panel was displaying the vehicle was still shifted into drive even though the gear shift lever was in park. in order to shut off the vehicle she had to apply the parking brake. she attempted to restart the vehicle but it would not start. the vehicle was not taken to have the failure diagnosed and was not repaired. the failure and current mileages were 34,000. sm.
02/12/2010440001
 Transmission on my 2006 trailblazer failed at 44,000 miles. the failure caused the vehicle to roll backwards almost immediately. the vehicle would only operate in 1st and 2nd gear. dealership inspection indicated that the transmission failed prematurely but had no explanation as to why. *tr
01/04/2010550001
 Driving to work soon as pull off the trans does not want to shift into second gear till you reach at least 2500 rpm's or higher and then jerks you in your seat. only does this from 1st to 2nd gear shift, all other shift work proper. could not make it to work that day (resulting in me being fired) instead had to take it to the transmission shop in which i paid 160 dollars to change solenoids, filter and fluid. this did not fix the problem. had 55,000 miles when this happened. the trans guy says it needs a rebuild which is in upwards of $2000. vehicle is 2006 trailblazer ss awd model. a $45,000 vehicle with a bad trans at 55,000 miles is ridiculous. i have now 56,000 miles. *tr
07/22/2009430001
 Transmission cooling lines corroded and failed causing a car fire. the transmission fluid leaked on to the catalytic converted igniting a fire that melted the wiring harness and elements of the electrical/computer system. *tr
06/15/200713000712/14/2006
 Tl*the contact owns a 2006 chevrolet trailblazer. the front passenger seat track cover was loose. in addition, the transmission would slip and the engine made a hissing sound while driving between 45-50 mph. the vehicle would drive in reverse and then shift into gear. the vehicle was taken to the dealer three times. when the contact removed his foot from the accelerator pedal, the vehicle would stop and not move again until it reached 5-8 mph (stabilizing track). the master cylinder also failed. when making a left or right turn ,the power steering would make a loud screeching sound. the vehicle was taken to the dealer six times. the dealer confirmed the failures. the current mileage was 49,000 and failure mileage was 13,000.
10/16/20074046008/20/2006
 Vehicle has 40,000 miles and transmission going bad already. codes pulled state that the transmission slipping
08/28/200717155112/12/2006
 I came to a complete stop and went to move into the intersection. a couple of feet into the intersection the transmission made a loud bang type sound and the suv stopped moving. this almost caused accident with cross traffic and i was almost hit twice when i pushed the suv out of the intersection. the suv was repaired at a dealership the cause was a failure of the forward sprag in the transmission. vehicle was a 2006 trailblazer lt 4wd with a 5.3 l v 8. transmission was repaired old part was not available. *jb
12/01/20064112/01/2006
 Tl*the contact owns a 2006 chevrolet trailblazer. the contact stated that when driving downhill and shifting into third gear, the vehicle only accelerated to 40 mph. the dealer stated that the vehicle was designed to operate in that manner. the current mileage is 7,000 and failure mileage was 4. the vehicle came equipped with a trailer hitch. the owners manual stated it could tow over 6,000 pounds. the transmission is a 4 speed auto. while going down hill, and manually moving the shift lever t the 3rd position for the engine compression, it would provide compression for slowing down to 40-45 mph. updated 08/09/07. *jb
05/04/200780002011/29/2005
 I have had many many problems with my 2006 chevrolet trailblazer most recently the transmission is bad, i had started complaining to the dealer about the transmission slipping at around 8,000 miles, the truck now has 17,000 miles on it. the dealer refuses to repair it under my warranty. the dealer will not cover the repair. the dealer told me i had to pay out of pocket. i was informed of this on 5/4/2007. i have had many many repairs done on this vehicle, something is not right. the dealer also refuses to fix the brakes, the dealer claimed to have repaired them 3,000 miles ago and told me that it is not possible for the brakes to be bad again, the dealer said i need rotors, pads, and they did replace a lt ft caliper that they found to be bad. the dealer will not replace the pads and rotors. the dealer has told me to pick my vehicle up. the vehicle is currently not in safe condition to operate on public highway, i informed the dealer that i will leave the truck there while i contact nhtsa and whoever else i find that will help me. if the dealer insist that i remove my vehicle, i will have it towed, i will not operate the vehicle on public highways, as it is not safe. i will now list some of the items most recently replaced. also, abs , check engine, and service 4wd lite was on and off since january 2007. the gas gauge malfunctioned. the instrument panel was replaced twice, also replaced the radio, front heater, rear heater, dvd player, both upper ball joints, brakes, ft wheel bearing, lt ft door control, ft calipers, some kind of bearing in the steering wheel. the front suspension still makes noise, rattles (the dealer cannot find the problem) there is more but this is what i remember right now without looking it up. the dealer also told me that it is not possible for so many things to be wrong and has accused me of changing parts over from another trailblazer. *tr
POWER TRAIN - DRIVELINE - DIFFERENTIAL UNIT
10/26/200721000101/19/2007
 Noise from rear axle drive shaft clank at times when shifting 1st to 2nd autotransmisson and light traffic when stop and go under acceleration dealer replace rear axle gears only not the whole complete rear transaxle and then installed rubber spring mounts rear noise is worse now load whine in over drive from 42-to- 62 mph. *tr
POWER TRAIN - TRANSFER CASE (4-WHEEL DRIVE)
05/04/200780002011/29/2005
 I have had many many problems with my 2006 chevrolet trailblazer most recently the transmission is bad, i had started complaining to the dealer about the transmission slipping at around 8,000 miles, the truck now has 17,000 miles on it. the dealer refuses to repair it under my warranty. the dealer will not cover the repair. the dealer told me i had to pay out of pocket. i was informed of this on 5/4/2007. i have had many many repairs done on this vehicle, something is not right. the dealer also refuses to fix the brakes, the dealer claimed to have repaired them 3,000 miles ago and told me that it is not possible for the brakes to be bad again, the dealer said i need rotors, pads, and they did replace a lt ft caliper that they found to be bad. the dealer will not replace the pads and rotors. the dealer has told me to pick my vehicle up. the vehicle is currently not in safe condition to operate on public highway, i informed the dealer that i will leave the truck there while i contact nhtsa and whoever else i find that will help me. if the dealer insist that i remove my vehicle, i will have it towed, i will not operate the vehicle on public highways, as it is not safe. i will now list some of the items most recently replaced. also, abs , check engine, and service 4wd lite was on and off since january 2007. the gas gauge malfunctioned. the instrument panel was replaced twice, also replaced the radio, front heater, rear heater, dvd player, both upper ball joints, brakes, ft wheel bearing, lt ft door control, ft calipers, some kind of bearing in the steering wheel. the front suspension still makes noise, rattles (the dealer cannot find the problem) there is more but this is what i remember right now without looking it up. the dealer also told me that it is not possible for so many things to be wrong and has accused me of changing parts over from another trailblazer. *tr