Remember that Searle's speech act types can be combined with one another. And, because the intention of the speaker is often what determines the nature of the speech act, it is sometime unclear as to exactly which type is present.
In this case, you have made a sound that references a house. This is a propositional utterance. If you intend the utterance to encourage your parents to talk to you, then it is also an illocutionary utterance. If you intend for them to stop the car and go in to look at the house, then you have also made a perlocutionary utterance.