Im not familiar with this car but it is likely to do with the engine wobbling due to lower than usual idle speed of the engine or a misfiring cylinder. Also if this vehicle has auto transmission and air-con are factors to be considered. For example, if this has auto transmission and it is kept in "D" whilst stationary, there will be load on the engine, which at idle speed can mean that the engine slows to a point where it "wobbles" with every piston stroke almost. The same will apply if air con is used when idling. If there is a misfire on any of the cylinders this can often be accompanied by a loss of power.
Check the motor mounts.
My guess would be wheel balance.
It's almost always warped rotors.
The fact that it's a piece of junk chevy, get a mustang. Ford all day.
split axel they say on take off
There are several things that can cause your 1995 Chevrolet Blazer to shake when accelerating. Bad spark plugs and spark plug wires can cause the vehicle to shake. Tuning up the engine may eliminate the problem.
A miss or A collapsed engine mount or A imbalance caused by a failing component, harmonic balancers and torque converters are common.
if this happens at a certain speed it's probably the alignment of the tires.
bad tires, wheel alignment , bad tierod ends, start with tires may just need balanced...its the cheapest
could be a vacuum hose leak--had the same problem and once the hose was replaced it stopped.
Bad CV joint. Bent rim. Needs alignment. anything relating to your wheels could be the cause.
first thing to look at is your front tires,most times they will have a wobbly look on the tread.you can run your hand over them and feel if it is wavy,CAUTION use a glove or old towel because steel belts could be coming through.if not it could be a tire balance problem