2008 Chevy Equinox, I'm getting an alarm for'Traction control' and check engine alarm. Is this something that only a dealership can correct? David

I have a 2008 model. I am assuming the stabilitrak button(on my SUV) located next to the geer shift is turning the stabilitrak system
on and off OK? If not maybe just this switch is bad?
Unfortunately my stabilitrak alarm indicator has started coming on
periodically too. Mine seems to get reset after driving it for some
time then stopping and restarting after several short trips. I'm not
sure if mine is a real issue if it goes away after a while of driving.
The last time my "check engine" light came on also. When the
traction control alarm went away, so did the check engine alarm.
Good luck.

Service Stabilitrak, Traction Control lights ON, alone with check ...

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Chevy Equinox Eco, Traction Control and Stabilitrak Systems

? 2:39
https://www.youtube.com/watch?v=15Qj4HzpBz0

run the fault codes to determine the exact sensor that is faulty

I had this alarm on my 2008 Equinox. I did not have it code scanned, but I found on the internet that a code P0403 or P0405 could suggest a faulty EGR .
I took a chance and replaced it for about $80 bucks and 30 mins. time and it corrected my problem so far.
I think Autozone will run a code scan on your SUV for free and they might suggest something else.

traction control will not cause starting issues read check engine light or security

Traction control uses the engine along with other components, so if the engine is not working correctly the traction control system can be disabled too.
You would need to get the computer scanned for codes to proceed.

my equinox has a constant beeping alarm even when doors are shut and car is running

Changing the sparkplugs has nothing to do with these lights, the trac control and stabilock would not be affected with just replacing sparkplugs, i assume the check engine light is not on since theres no mention of it , if the engine light were to be on then there may be a connection, the computer will turn off these systems if it turns on the check engine light for any reason, when the engine is not running as its suppose to the computer shuts down these systems because they can not operate correctly with a engine light on.

The traction control light usually goes on when a wheel speed sensor is not sending valid speed signals to the traction control module, or the module itself is bad.

Modules can cost hundreds of dollars, or the wheel hub assemblies replaced to rectify a basd wheel speed sensor can also cost in the hundreds of dollars, unfortunately.

If it jumps a little in the snow, and the traction control light was off (indicating it was working correctly at the time), I wouldn't worry too much about it, as the traction control may be working properly at that time.

Was the jumping alarming making the car 'buck?'

The wheels may have been getting traction intermittently by hitting gravel or the road that didn't have snow and ice on it. This is normal.

However, if the bucking continues, I would have it checked out at the dealer if feasible.

Hope this helps and good luck on this repair.

No T/C stands for traction control all it does is keep your back tires from spinning on wet surfaces. I turn my off. All it does is slow the motor down so your wheels if they are spinning they can get traction.