i’m not sure what 2" looks like on a cavy but if its not slammed (4" or greater from the ground to the pinch weld) most shops should be able to lift it. you are probably low on brake fluid, which would also indicate that your brake pads are low on one of your axles (meaning front or rear) or both. check your fluid. there are no sensors in the drums. the parking brake sensor is inside your car usually.