Appropriate behaviour is cardinal among people in every community. It is practically fundamental for young people and the youth to exhibit acceptable behaviour and university students are no exception. To attain acceptable behaviour there is need for behaviour modification. This paper is an extract from an on-going PhD study. The study was guided by the objective which sought to establish how guidance and counselling services were used to address deviate behaviour by students in public universities. In order to attain this objective; a descriptive survey design was used, with a sample of 105. In-depth interview guides, focus group discussions and self-administered questionnaires were used to collect data. Thematic analysis and SPSS were used to analyse the data. The study found that students who accessed guidance and counselling services exhibited acceptable behaviour in various aspects of their lives. In conclusion; the paper argues that students who received guidance and counselling services had their behaviours modified. On the basis of these findings, the study recommends that there is need to encourage all students in public universities to access guidance and counselling for them to develop acceptable behaviour.