As with most aftermarket alarm system manufacturers, Directed Electronics Inc. (DEI) offers remote start add-on systems that work with any vehicle. They have marketed remote start systems under a variety of brand names. The Clifford brand system is a model called Matrix Responder One. The original and replacement remote for this system is a 1-button keyfob with FCC ID EZSDEI7211X.
See replacement remote for Clifford Matrix Responder One system here.
DEI also sold Responder One systems under the Python and Viper brands. The Clifford remote will work for these systems as well. All DEI Responder One remote start systems are user programmable.