Grand Vitara 2005 1.6 - 3p squeals a strap.

I recommend you buy the original strap; they cost more but last longer and save you a headache

When I refer to belts as type A or type B, it's because they have different angles or profiles. You have to compare the angle of the pulley with the belt; the angle of the belt must match the angle of the pulley

Look, V-belts differ in the width of the flat side; they range from 8mm to 14mm. If the squealing is from the power steering belt when it reaches its limit, it's because it lacks tension or is thinner than the one it uses, causing the belt to touch the bottom of the pulley, making it appear loose even though it's tight

I hadn't read the whole thread. If it's in the morning, it's because of the alternator's charge when recharging the battery. I advise you to check the alternator's output; it shouldn't be more than 14.2 volts. Also, change that belt. The squealing doesn't stop due to temperature; the alternator reduces its workload when recharging the battery. An alternator can draw up to 2 horsepower from an engine

I think that might be it...
if I understand correctly, it would be because the alternator is overworking at the beginning, due to the belt? But they're both new, and after a couple of weeks, I gave them a second tightening for break-in.
It's strange, because sometimes two or three days can go by without any noise, but sometimes I go out in the morning or after the car has been sitting for a long time and it squeals like crazy. Another thing is that sometimes I turn on the air conditioning and it tends to squeal, but not always, only after the car has been off for a long time.