Generally cracks in a basement are a sign of more problems. Suggest getting a few estimates from companies such as Chicagoland water proofing, every dry, permaseal, etc. We used Chicago land and was pleased with the work to install drainage tile and sump. Does water come in through the crack - if yes definitely call a waterproofing company. If the masonry is just sealed from the basement through tuck pointing or patching it will be a lot cheaper but may eventually cause the foundation to fail.