diff --git a/selfdrive/car/gm/carcontroller.py b/selfdrive/car/gm/carcontroller.py
index 6ae47a5b7..4f20ae1ae 100644
--- a/selfdrive/car/gm/carcontroller.py
+++ b/selfdrive/car/gm/carcontroller.py
@@ -180,14 +180,14 @@ class CarController(CarControllerBase):
           self.spoof_mid_sent = True
 
       # Overflow spoof: insert extra when accumulator allows
-      if self.spoof_accum >= 0.6 and not self.spoof_over_sent and interval_ns > 0:
+      if self.spoof_accum >= 0.5 and not self.spoof_over_sent and interval_ns > 0:
         slot2_ns = self.prev_steer_ts_ns + (interval_ns * 2) // 3
-        if now_nanos >= slot2_ns and now_nanos - self.last_steer_ts_ns >= 15_000_000:
+        if now_nanos >= slot2_ns and now_nanos - self.last_steer_ts_ns >= 20_000_000:
           paddle_sends.append(gmcan.create_prndl2_command(self.packer_pt, CanBus.POWERTRAIN, True))
           paddle_sends.append(gmcan.create_regen_paddle_command(self.packer_pt, CanBus.POWERTRAIN, True))
           self.last_spoof_ts_ns = now_nanos
           self.spoof_over_sent = True
-          self.spoof_accum -= 0.6
+          self.spoof_accum -= 0.5
     # === End Spoof scheduling ===
 
     # === Off-pulse scheduling on regen release ===