Q: car is getting spark but cranks with no start on 2003 Buick Rendezvous

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
already replaced crank sensor and spark plugs
(2) Answers
Many things can cause this condition.
- Fuel pump
- Fuel injectors
- Ignition Control Module

You need to see if it is getting spark and fuel pressure. If these both check OK, then I would suspect the ignition system (coil packs, ICM, or crank sensor).