If you do not give consent, the officer or Trooper will obtain a search warrant from the magistrates office while you wait on the side of the road, and then another officer will deliver and serve it on you! They can detain you for a reasonable amount of time as stated in the law! So, saying no to a search, will only result in a detained visit , while another officer delivers a search warrant to search your car or belongings! Some HP agencies can even have a copy sent to there computer terminal so they can print the search warrant , serve it on you , and then search your car! You cannot say no , because the right to drive a vehicle on a public road or highway is granted by the state !