The driver of the Corsa failed to stop at the scene. The car has also since been recovered by officers in the Oldham area. A 22-year-old man has been arrested on suspicion of causing serious injury by dangerous driving.
Sergeant Darren Hancock, of GMP's Serious Collision Investigation Unit, said: "Our thoughts remain with the woman who is currently in a critical condition as result of this incident. "Although we have arrested a man, our investigation is very much still ongoing and we would like to speak to anyone who was in the area at the time and might have seen this white Vauxhall Corsa - which has very distinctive black wheels. "If you witnessed this collision or have any dash cam footage of this car leading up to, during, or following.
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