diff --git a/selfdrive/car/gm/interface.py b/selfdrive/car/gm/interface.py
index 032a49e761..44ece1d415 100755
--- a/selfdrive/car/gm/interface.py
+++ b/selfdrive/car/gm/interface.py
@@ -207,6 +207,7 @@ class CarInterface(CarInterfaceBase):
       ret.wheelbase = 2.95  # 116 inches in meters
       ret.steerRatio = 17.3
       ret.centerToFront = ret.wheelbase * 0.5
+      ret.longitudinalActuatorDelayUpperBound = 0.5  # large delay to initially start braking
       CarInterfaceBase.configure_torque_tune(candidate, ret.lateralTuning)
 
     elif candidate == CAR.ESCALADE_ESV: