We sought to determine whether receiving major re-selection (MRS) advising benefits undergraduate students' grade-point averages (GPAs). We used a quasi-experimental nonequivalent control group design to compare a treatment group (n = 219) of undergraduates who changed their majors after receiving MRS advising with a control group (n = 206) who changed majors without advising during the same semester as the treatment group. Findings showed that, on average, students who received MRS experienced no change in their program GPA but an increase in their semester GPA; however, the control group experienced a decrease in program and semester GPAs. Multiple regression analysis confirmed that MRS advising had a positive effect on posttest semester GPAs (ß = 0.33, p < 0.001) and program GPAs (ß = 0.28, p < 0.001). Implications for student advising are discussed.