It's either loose or you have a bearing going out on idler or an accessory.
The 4.3 litre V6 engine in a 2000 Chevrolet Blazer has a timing CHAIN
Yes
The 2000 Chevy Trail Blazer doesn't have a timing belt.
It doesn't have a timing belt.
That depends on how, when and where it is squealing. For example, if the brakes squeal when applied, the brake pads are probably worn down. A squeal from the engine compartment whenever the engine is running could be a loose serpentine belt (especially if the squeal changes a little when you rev the engine).
Belt may be loose or glazed
squeal is a lose belt or one of the accessory will need to be replaced soon
how do you replace seatbelt retractor on a 2000 chevy blazer
The seat belt might not fasten in a 2000 Chevy Blazer because there is a foreign object in the slot where the seat belt fits. Even the tiniest of objects can cause the seat belt to not latch properly.
Timing Chain
You can't. it has an automatic self adjusting belt tensioner on it.
It does not have a timing belt, That engine has a timing chain and gears and they normally last the life of the engine.