diff --git a/selfdrive/car/gm/interface.py b/selfdrive/car/gm/interface.py
index a21b6a9c0..abad8399a 100644
--- a/selfdrive/car/gm/interface.py
+++ b/selfdrive/car/gm/interface.py
@@ -120,9 +120,8 @@ class CarInterface(CarInterfaceBase):
 
       # Tuning for experimental long
       ret.longitudinalTuning.kiV = [2.0, 1.5]
-      ret.stoppingDecelRate = 2.0  # reach brake quickly after enabling
-      ret.vEgoStopping = 0.25
-      ret.vEgoStarting = 0.25
+      ret.vEgoStopping = 0.1
+      ret.vEgoStarting = 0.1
 
       if experimental_long:
         ret.pcmCruise = False