Put a small dab of clear dialectic grease on both sides of the belts and the squeak will go away.
Squeaking or tearing of the rubber on the belt
loose belts
Most belts can be stopped from squeaking by adding lubrication. This can come in the form of belt dressing or even common bath soap.
It won't be the engine that's squeaking, it will most likely be a belt, take it to a mechanic to get the belts tightened up.
Could be one of your belts.
One of your belts may be loose or in need of belt dressing.
Loose belts
In those countries that require seat belts by law, all vehicles that have a seating capacity of 8 people.
any seat belts from an 1981 through1987 Chevy truck or 1981 through 1989 blazer or suburban
Most commonly caused by bad belts. It may go away as you rev the engine.
Most Jimmys use a spring loaded belt tensioner that is not adjustable. NOTE: It is normal for belt tensioner to "bounce" a little bit when engine is running. If your belt is squeaking here are a couple things you can do. Replace the belt with a QUALITY belt. Don't buy the cheap belts on vehicles with long serpentine belts. They will squeak. I recommend Garorback belts. If your belt is still squeaking ensure that all pulleys and belt driven items are working properly by rotating and checking them with the belt off. Most GM vehicles have an idler pulley. It is very common for the bearing on it to go bad. If you still have a squeak then replace the tensioner assembly. They are readilly availably at parts stores.
The Van Allen radiation belts are layers of plasma particles that are around the earth in the magnetosphere. These radiation belts were confirmed to exist in 1958 by James Van Allen. There is an outer and inner belt. The belts can cause problems for both satellites and any rockets or other vehicles that travel through the belts.