Pulling out on the road before oncoming traffic and accelerated normal. The vehicle traveled about 10 to 20 yds when the engine RPM drastically 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 increased and no forward motion, shifted to 3 and tried again (nothing), shifted to 2 and then the transmission 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 occasions 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 ft\lb 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. Their 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 handling the power developed. It is a safety hazard if quick acceleration was needed to cross an intersection or avoid oncoming traffic. Fortunately I wasn't crossing traffic and turning from the parking lot onto the road able to avoid oncoming traffic avoiding a serious accident. Trailblazer.

- Taylor, TX, USA

2006 Chevrolet Trailblazer. Consumer states problem with brakes and traction control light illuminating. 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.

- Branson, MO, USA

The contact owns a 2006 Chevrolet Trailblazer. After stopping the vehicle she shifted into park and removed her foot off of the brake pedal; the vehicle surged forward until she reapplied pressure to the brake pedal. Once the vehicle stopped she noticed that the instrument panel displayed that the vehicle was still shifted in drive even though the gear shift lever was in park. In order to turn off the vehicle she had to apply the parking brake. She attempted to restart the vehicle but it would not start. The failure was not diagnosed. The vehicle was not repaired. The failure and current mileages were 34,000.

- West Palm Beach, FL, USA

2006 Chevy Trailblazer - bought at 11,000 miles in March 2007. Now, at 46,000 miles, just after warranty expired, I have fuel gauge failure; automatic transmission problems; 4WD problems.

- Grantsville, MD, USA

Front axle of 2006 Chevy Trailblazer became unattached from the transfer case.

- Smithfield, RI, USA

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.

- Hellertown, PA, USA

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.

- Troy, MI, USA

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.

- North Tonawanda, NY, USA

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.

- Park Forest, IL, USA

Vehicle has 40,000 miles and transmission going bad already. Codes pulled state that the transmission slipping

- Avilla, IN, USA

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.

- Galt, CA, USA

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.

- Benson, AZ, USA

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.

- Buffalo, NY, USA