add GM

selfdrive/car/gm/carcontroller.py

@@ -118,7 +118,7 @@ class CarController(CarControllerBase):
         # Send dashboard UI commands (ACC status)
         send_fcw = hud_alert == VisualAlert.fcw
         can_sends.append(gmcan.create_acc_dashboard_command(self.packer_pt, CanBus.POWERTRAIN, CC.enabled,
-                                                            hud_v_cruise * CV.MS_TO_KPH, hud_control.leadVisible, send_fcw))
+                                                            hud_v_cruise * CV.MS_TO_KPH, hud_control, send_fcw))
 
       # Radar needs to know current speed and yaw rate (50hz),
       # and that ADAS is alive (10hz)

selfdrive/car/gm/gmcan.py

@@ -102,17 +102,17 @@ def create_friction_brake_command(packer, bus, apply_brake, idx, enabled, near_s
   return packer.make_can_msg("EBCMFrictionBrakeCmd", bus, values)
 
 
-def create_acc_dashboard_command(packer, bus, enabled, target_speed_kph, lead_car_in_sight, fcw):
+def create_acc_dashboard_command(packer, bus, enabled, target_speed_kph, hud_control, fcw):
   target_speed = min(target_speed_kph, 255)
 
   values = {
     "ACCAlwaysOne": 1,
     "ACCResumeButton": 0,
     "ACCSpeedSetpoint": target_speed,
-    "ACCGapLevel": 3 * enabled,  # 3 "far", 0 "inactive"
+    "ACCGapLevel": hud_control.leadDistanceBars * enabled,  # 3 "far", 0 "inactive"
     "ACCCmdActive": enabled,
     "ACCAlwaysOne2": 1,
-    "ACCLeadCar": lead_car_in_sight,
+    "ACCLeadCar": hud_control.leadVisible,
     "FCWAlert": 0x3 if fcw else 0
   }