GM: move abandoned cars into dashcam only (#23423)

old-commit-hash: 450656e2a7

selfdrive/car/gm/interface.py

@@ -44,6 +44,11 @@ class CarInterface(CarInterfaceBase):
     ret.safetyConfigs = [get_safety_config(car.CarParams.SafetyModel.gm)]
     ret.pcmCruise = False  # stock cruise control is kept off
 
+    # These cars have been put into dashcam only due to both a lack of users and test coverage.
+    # These cars likely still work fine. Once a user confirms each car works and a test route is
+    # added to selfdrive/test/test_routes, we canr remove it from this list.
+    ret.dashcamOnly = candidate in {CAR.CADILLAC_ATS, CAR.HOLDEN_ASTRA, CAR.MALIBU}
+
     # Presence of a camera on the object bus is ok.
     # Have to go to read_only if ASCM is online (ACC-enabled cars),
     # or camera is on powertrain bus (LKA cars without ACC).