diff --git a/selfdrive/car/gm/interface.py b/selfdrive/car/gm/interface.py
index 632c3dfa7..f6a6e89d0 100644
--- a/selfdrive/car/gm/interface.py
+++ b/selfdrive/car/gm/interface.py
@@ -297,8 +297,8 @@ class CarInterface(CarInterfaceBase):
       if not ret.enableGasInterceptor and candidate in CC_ONLY_CAR: #redneck tuning
         ret.longitudinalTuning.kpBP = [10.7, 10.8, 28.]  # 10.7 m/s == 24 mph
         ret.longitudinalTuning.kpV = [0., 20., 20.]  # set lower end to 0 since we can't drive below that speed
-        ret.longitudinalTuning.deadzoneBP = [0.]
-        ret.longitudinalTuning.deadzoneV = [0.56]  # == 2 km/h/s, 1.25 mph/s
+        ret.longitudinalTuning.deadzoneBP = [0., 1.]
+        ret.longitudinalTuning.deadzoneV = [0.56, 0.56]  # == 2 km/h/s, 1.25 mph/s
         ret.longitudinalActuatorDelay = 1.  # TODO: measure this
         ret.longitudinalTuning.kiBP = [0.]
         ret.longitudinalTuning.kiV = [0.1]