diff --git a/selfdrive/car/gm/interface.py b/selfdrive/car/gm/interface.py
index a126e9e9e2ba1f..a7d786f05ed4e9 100755
--- a/selfdrive/car/gm/interface.py
+++ b/selfdrive/car/gm/interface.py
@@ -202,9 +202,9 @@ def _update(self, c):
     if self.CS.cruise_buttons != self.CS.prev_cruise_buttons:
       be = car.CarState.ButtonEvent.new_message()
       be.type = ButtonType.unknown
-      if self.CS.cruise_buttons[-1] != 0:
+      if self.CS.cruise_buttons != CruiseButtons.UNPRESS:
         be.pressed = True
-        but = self.CS.cruise_buttons[-1]
+        but = self.CS.cruise_buttons
       else:
         be.pressed = False
         but = self.CS.prev_cruise_buttons