Tire out of balance, bent wheel, defective tire, worn suspension or steering parts. Have the tires balanced, and all parts inspected.
Probably wheel balance.
Wheels require balancing.
Bad tires, out of balance , wrong wheels , bad tie rod end.
COULD BE FRONT TIE ROD END
One reason a cars front end may shake is bad struts. However, it can also be other things such as a bad tire or even if an alignment is needed.
worn front end bushings, the death wobble usually needs track bar bushings but I recommend replacing them all with nylon when you do it.
problem with your transmission in 5th gear
Tires out of balance, bent wheel, or defective tire.
The fact that it's a piece of junk chevy, get a mustang. Ford all day.
Worn steering parts, worn suspension parts, tires out of balance, out of alignment,
Tire our of balance or bent wheel. Have your tires rotated and balanced.
Your front end is probably out of alignment. Have it checked at a mechanic.