diff --git a/selfdrive/car/gm/interface.py b/selfdrive/car/gm/interface.py
index e25f203772..905b85436a 100755
--- a/selfdrive/car/gm/interface.py
+++ b/selfdrive/car/gm/interface.py
@@ -90,6 +90,9 @@ class CarInterface(CarInterfaceBase):
     ret.longitudinalTuning.kiBP = [0.]
     ret.longitudinalTuning.kiV = [0.36]
 
+    ret.longitudinalTuning.deadzoneBP = [0.]
+    ret.longitudinalTuning.deadzoneV = [0.15]
+
     ret.steerLimitTimer = 0.4
     ret.radarTimeStep = 0.0667  # GM radar runs at 15Hz instead of standard 20Hz
 
diff --git a/selfdrive/test/process_replay/ref_commit b/selfdrive/test/process_replay/ref_commit
index 44594d12e6..1682d5eb14 100644
--- a/selfdrive/test/process_replay/ref_commit
+++ b/selfdrive/test/process_replay/ref_commit
@@ -1 +1 @@
-dd41df756253a9e711eb0fd0c3e007284f600ee8
\ No newline at end of file
+7828f8a2e00a5b73471a90850b18874617e82610