diff --git a/opendbc/car/gm/interface.py b/opendbc/car/gm/interface.py
index 1cdb04fa..1cb807b2 100755
--- a/opendbc/car/gm/interface.py
+++ b/opendbc/car/gm/interface.py
@@ -53,10 +53,10 @@ class CarInterface(CarInterfaceBase):
       # This has big effect on the stability about 0 (noise when going straight)
       non_linear_torque_params = NON_LINEAR_TORQUE_PARAMS.get(self.CP.carFingerprint)
       assert non_linear_torque_params, "The params are not defined"
-      a, b, c, _ = non_linear_torque_params
+      a, b, c, d = non_linear_torque_params
       sig_input = a * lateral_acceleration
       sig = np.sign(sig_input) * (1 / (1 + exp(-fabs(sig_input))) - 0.5)
-      steer_torque = (sig * b) + (lateral_acceleration * c)
+      steer_torque = (sig * b) + (lateral_acceleration * c) + d
       return float(steer_torque)
 
     lataccel_values = np.arange(-5.0, 5.0, 0.01)