diff --git a/selfdrive/car/gm/carstate.py b/selfdrive/car/gm/carstate.py
index 56abbb1b01..6a6e1ccaef 100644
--- a/selfdrive/car/gm/carstate.py
+++ b/selfdrive/car/gm/carstate.py
@@ -37,7 +37,7 @@ class CarState(CarStateBase):
     self.moving_backward = (pt_cp.vl["EBCMWheelSpdRear"]["RLWheelDir"] != 2) and (pt_cp.vl["EBCMWheelSpdRear"]["RRWheelDir"] != 2)
     rl_wheel_dir = pt_cp.vl["EBCMWheelSpdRear"]["RLWheelDir"]
     rr_wheel_dir = pt_cp.vl["EBCMWheelSpdRear"]["RRWheelDir"]
-    assert rl_wheel_dir in (1, 2) and rr_wheel_dir in (1, 2), f"Invalid RLWheelDir: {rl_wheel_dir}, RRWheelDir: {rr_wheel_dir}"
+    assert rl_wheel_dir not in (3, 4) and rr_wheel_dir not in (3, 4), f"Invalid RLWheelDir: {rl_wheel_dir}, RRWheelDir: {rr_wheel_dir}"
 
     # Variables used for avoiding LKAS faults
     self.loopback_lka_steering_cmd_updated = len(loopback_cp.vl_all["ASCMLKASteeringCmd"]["RollingCounter"]) > 0