Currently, the vehicle comprises three stages:
GSLV III运载火箭的第一级是2枚固体燃料推进器，代号S200。 第二级和第三级是常用的液体燃料发动机。 6park.com
First stage: Two S200 boosters are strapped on to the core of the rocket. These boosters are the third-largest solid fuel boosters ever developed and the second largest in service. Only the now-retired Space Shuttle and the Ariane rockets used larger boosters. The S200s each carry 207 tonnes of propellant and deliver 5,150 kN of peak thrust.
Second stage: By far the most under-rated motor on the GSLV, the second stage rockets, designated L110, are liquid fuel rockets based on the French Viking engine. This engine was, in turn, jointly developed by Indian and French scientists. The version we use in India is called the Vikas engine.
These engines carry about 116 tonnes of fuel and generate about 1,600 kN of thrust at sea level.
This family of engines has powered over 100 launches of India’s PSLV, GSLV, and the French Ariane launch vehicles. What's remarkable is that it's never failed. It is this engine that allowed the PSLV to earn its "workhorse" nickname.
Third stage: The engine that makes the GSLV a GSLV is the third stage motor. A record-setter in its own right, this cryogenic engine is classified as one of the most powerful upper stage motors in the world.