My 2007 trailblazer ss will on occasion from a stop will kick in the traction control and stabilatrac and the vehicle loses all power even though the wheels have not lost any traction( dry pavement ). It happens more when turning left from a stop. The only way I get around this is by accelerating from the stop aggressively.

First you need to have EBCM - electronic brake control module check for DTC'S - diagnostic trouble code's . If the light is on there is a code stored . I think most part stores can do this and for free . After you find out what code is stored , looking up that code in service repair information for diagnostic trouble shooting chart would be next step . There are a few codes too.
DTC C0035 or C0040
DTC C0045 or C0050
DTC C0110
DTC C0131
DTC C0161
DTC C0186
DTC C0196
DTC C0201
DTC C0240
DTC C0241 or P0856
DTC C0244 or P1689
DTC C0245
DTC C0283
DTC C0287
DTC C0290 or C0292
DTC C0455
DTC C0550
DTC C0558

Find the code do the diagnostic's , fix the problem , wiring issue's , a sensor , bad module ,what ever it is . The light will go out then . Here is a sample of code discription .
• DTC C0035 Left Front Wheel Speed Sensor Circuit
• DTC C0040 Right Front Wheel Speed Sensor Circuit

Alexandre, check in your owners manual for small off button on the shifter under the large engage button. If you do not want traction control on in your vehicle check your manual for traction control fuse location and remove fuse. I can not say this is a wise thing to do, because your traction control is a safety feature for your vehicle. ABS braking system will be lost if you pull the fuse also. Pulling the fuse will disable abs, traction and stability control. Check the attached links,instruction and guides, Good luck
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forums.trailvoy.com > ... > 02-09 General Tech Q&A > General

Dec 24, 2009 - 11 posts - ‎7 authors
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if its a constant then check out abs sensor -hub for damage or need of replacement if happens on occasion than its doing what its suppose to and that is to reduce power so as not to cause a roll over or slid of vehicle if the vehicle senses to fast a turn or wheel slide will reduce power (traction control)

A manifold gasket leak will cause a power loss everywhere you drive, although a hot engine may lose more power than a cold one. You can check you spark plug color. A manifold leak makes a lean mixture so the plug should show the typical white-ish deposits.

The traction control system DOES cut your engine power when the tires spin. That is by design. The system cuts engine power to stop the wheels spinning and restores power once the wheels regain traction. It feels odd when the tires spin and power cuts out. It's good practice to lift off the accelerator when the system kicks in. Otherwise, if you are on gravel or slick streets the tires may spin, stop when traction control kicks in, and then spin again when power is restored. It is not an "elegant" solution but it does work for the most part.

IT IS A PROGRAM ON THE VEHICLE THAT DETECTS IF ONE WHEEL IS SLIPPING IT WILL AUTOMATICALLY SWITCH TO A DIFFERENT TIRE THAT IS GETTING TRACTION ITS A VERY NICE OPTION TO HAVE IN A VEHICLE EXSECIALLY IN SNOW

the ignition switch is a very common problem with these vehicles. when the problem is occuring check the pink wire coming off the ignition switch and see if there is power. the computer controls the starter on this vehicle and if there is insuficient voltage going to the ecu it will not power up.

It is the stabiliTrak. Press it once to turn off traction control. If you press and hold for a few seconds, it will disable stabiliTrak. It should automatically turn back on the next time you start the vehicle up.

It sounds like you have an intermitent shift solenoid failure.This is what would cause your failure. You may possibly have an electrical failure also. I hope this helps.
Thank You,
Roy