KBS Diesel & Fleet Services is dedicated to ensuring your fleet stays on the road and in excellent condition. Our team has been serving the Santa Ana area since 1985. We deliver professional fleet and truck repair services and are equipped to handle major and minor repairs.KBS Diesel & Fleet Services is dedicated to ensuring your fleet stays on the road and in excellent condition. Our team has been serving the Santa Ana area since 1985. We deliver professional fleet and truck repair services and are equipped to handle major and minor repairs.