Bad belt.
Worn tensioner.
Bad compressor.
Trouble code P0400 means: EGR System Performance
Dust, unevenness.
Normally old/worn wipers will make more noise because the rubber is dried out, stiff and fighting the glass. If you replace the wipers and still have noise, usually its a twisted wiper arm (but this situation is rare - changing wipers solves the problem 99% of the time). See sources and related links below for information on Suzuki Grand Vitara wiper blades.
Turning the steering wheel farthest left or right for a few seconds will cause a loud squealing.
check your wheel bearings
The most common cause is slipping belt
The cause of the squealing sound is because you are turning the steering wheel completely to the right or left
I don't know, but mine does it too...kinda scary sometimes! I would check the tire pressure first if that is with in spec's then i would have the alignment check as well as the susspension I have this problem too. It seems to me that it happens more often when it is windy. I've had my Vitara blown across lanes on often on windy days.
it could be a serpentine belt or accessory belt.
A worn or loose out of adjustment drive belt could be the cause.
Sounds like your belt may be worn out.
The belt has worn on the edges and creates friction which causes squealing. Also, sometimes when a belt is cold it will squeal.