diff --git a/selfdrive/car/car_specific.py b/selfdrive/car/car_specific.py
index 151a8479a..9513f0ba9 100644
--- a/selfdrive/car/car_specific.py
+++ b/selfdrive/car/car_specific.py
@@ -1,6 +1,7 @@
 from cereal import car, log, custom
 import cereal.messaging as messaging
 from opendbc.car import DT_CTRL, structs
+from opendbc.car.gm.values import GMFlags
 from opendbc.car.interfaces import MAX_CTRL_SPEED
 
 from openpilot.selfdrive.selfdrived.events import Events
diff --git a/selfdrive/car/card.py b/selfdrive/car/card.py
index 8448af56d..960ff63c2 100755
--- a/selfdrive/car/card.py
+++ b/selfdrive/car/card.py
@@ -12,7 +12,7 @@ from openpilot.common.params import Params
 from openpilot.common.realtime import config_realtime_process, Priority, Ratekeeper
 from openpilot.common.swaglog import cloudlog, ForwardingHandler
 
-from opendbc.car import DT_CTRL, structs
+from opendbc.car import DT_CTRL, structs, ButtonType
 from opendbc.car.can_definitions import CanData, CanRecvCallable, CanSendCallable
 from opendbc.car.carlog import carlog
 from opendbc.car.fw_versions import ObdCallback
@@ -81,6 +81,7 @@ class Car:
     self.CS_prev = car.CarState.new_message()
     self.CS_SP_prev = custom.CarStateSP.new_message()
     self.initialized_prev = False
+    self.resume_prev_button = False
 
     self.last_actuators_output = structs.CarControl.Actuators()
 
@@ -218,12 +219,17 @@ class Car:
     self.v_cruise_helper.update_v_cruise(CS, self.sm['carControl'].enabled, self.is_metric)
     if self.sm['carControl'].enabled and not self.CC_prev.enabled:
       # Use CarState w/ buttons from the step selfdrived enables on
-      self.v_cruise_helper.initialize_v_cruise(self.CS_prev, self.experimental_mode, self.dynamic_experimental_control)
+      self.v_cruise_helper.initialize_v_cruise(self.CS_prev, self.experimental_mode, self.dynamic_experimental_control, self.resume_prev_button)
 
     # TODO: mirror the carState.cruiseState struct?
     CS.vCruise = float(self.v_cruise_helper.v_cruise_kph)
     CS.vCruiseCluster = float(self.v_cruise_helper.v_cruise_cluster_kph)
 
+    if any(be.type in (ButtonType.accelCruise, ButtonType.resumeCruise) for be in CS.buttonEvents):
+      self.resume_prev_button = True
+    elif any(be.type in (ButtonType.decelCruise, ButtonType.setCruise) for be in CS.buttonEvents):
+      self.resume_prev_button = False
+
     return CS, CS_SP, RD
 
   def state_publish(self, CS: car.CarState, CS_SP: custom.CarStateSP, RD: structs.RadarDataT | None):
diff --git a/selfdrive/car/cruise.py b/selfdrive/car/cruise.py
index 01ef2d7c9..4906bb84c 100644
--- a/selfdrive/car/cruise.py
+++ b/selfdrive/car/cruise.py
@@ -2,6 +2,7 @@ import math
 import numpy as np
 
 from cereal import car
+from opendbc.car.gm.values import CC_ONLY_CAR, GMFlags
 from openpilot.common.conversions import Conversions as CV
 from openpilot.sunnypilot.selfdrive.car.cruise_ext import VCruiseHelperSP
 
@@ -33,6 +34,7 @@ class VCruiseHelper(VCruiseHelperSP):
   def __init__(self, CP):
     VCruiseHelperSP.__init__(self)
     self.CP = CP
+    self.gm_cc_only = self.CP.carFingerprint in CC_ONLY_CAR and self.CP.flags & GMFlags.CC_LONG.value
     self.v_cruise_kph = V_CRUISE_UNSET
     self.v_cruise_cluster_kph = V_CRUISE_UNSET
     self.v_cruise_kph_last = 0
@@ -125,15 +127,16 @@ class VCruiseHelper(VCruiseHelperSP):
         self.button_timers[b.type.raw] = 1 if b.pressed else 0
         self.button_change_states[b.type.raw] = {"standstill": CS.cruiseState.standstill, "enabled": enabled}
 
-  def initialize_v_cruise(self, CS, experimental_mode: bool, dynamic_experimental_control: bool) -> None:
+  def initialize_v_cruise(self, CS, experimental_mode: bool, dynamic_experimental_control, resume_prev_button: bool) -> None:
     # initializing is handled by the PCM
-    if self.CP.pcmCruise:
+    if self.CP.pcmCruise and not self.gm_cc_only:
       return
 
     initial_experimental_mode = experimental_mode and not dynamic_experimental_control
     initial = V_CRUISE_INITIAL_EXPERIMENTAL_MODE if initial_experimental_mode else V_CRUISE_INITIAL
 
-    if any(b.type in (ButtonType.accelCruise, ButtonType.resumeCruise) for b in CS.buttonEvents) and self.v_cruise_initialized:
+    if ((any(b.type in (ButtonType.accelCruise, ButtonType.resumeCruise) for b in CS.buttonEvents) and self.v_cruise_initialized)
+        or (self.gm_cc_only and resume_prev_button)):
       self.v_cruise_kph = self.v_cruise_kph_last
     else:
       self.v_cruise_kph = int(round(np.clip(CS.vEgo * CV.MS_TO_KPH, initial, V_CRUISE_MAX)))
diff --git a/selfdrive/controls/controlsd.py b/selfdrive/controls/controlsd.py
index 9ef985fcc..f2123fc27 100755
--- a/selfdrive/controls/controlsd.py
+++ b/selfdrive/controls/controlsd.py
@@ -129,6 +129,9 @@ class Controls(ControlsExt):
     pid_accel_limits = self.CI.get_pid_accel_limits(self.CP, CS.vEgo, CS.vCruise * CV.KPH_TO_MS)
     actuators.accel = float(self.LoC.update(CC.longActive, CS, long_plan.aTarget, long_plan.shouldStop, pid_accel_limits))
 
+    if len(long_plan.speeds):
+        actuators.speed = long_plan.speeds[-1]
+        
     # Steering PID loop and lateral MPC
     # Reset desired curvature to current to avoid violating the limits on engage
     new_desired_curvature = model_v2.action.desiredCurvature if CC.latActive else self.curvature
diff --git a/selfdrive/controls/lib/drive_helpers.py b/selfdrive/controls/lib/drive_helpers.py
index 51eb694b4..37848e151 100644
--- a/selfdrive/controls/lib/drive_helpers.py
+++ b/selfdrive/controls/lib/drive_helpers.py
@@ -63,3 +63,24 @@ def get_curvature_from_plan(yaws, yaw_rates, t_idxs, vego, action_t):
   psi_target = np.interp(action_t, t_idxs, yaws)
   psi_rate = yaw_rates[0]
   return curv_from_psis(psi_target, psi_rate, vego, action_t)
+
+def interp(x, xp, fp):
+  N = len(xp)
+  def get_interp(xv):
+    hi = 0
+    while hi < N and xv > xp[hi]:
+      hi += 1
+    low = hi - 1
+    return fp[-1] if hi == N and xv > xp[low] else (
+      fp[0] if hi == 0 else
+      (xv - xp[low]) * (fp[hi] - fp[low]) / (xp[hi] - xp[low]) + fp[low])
+  return [get_interp(v) for v in x] if hasattr(x, '__iter__') else get_interp(x)
+
+def apply_deadzone(error, deadzone):
+  if error > deadzone:
+    error -= deadzone
+  elif error < -deadzone:
+    error += deadzone
+  else:
+    error = 0.
+  return error
\ No newline at end of file
diff --git a/selfdrive/controls/lib/longcontrol.py b/selfdrive/controls/lib/longcontrol.py
index 6d4f92246..cd1da42da 100644
--- a/selfdrive/controls/lib/longcontrol.py
+++ b/selfdrive/controls/lib/longcontrol.py
@@ -1,7 +1,7 @@
 import numpy as np
 from cereal import car
 from openpilot.common.realtime import DT_CTRL
-from openpilot.selfdrive.controls.lib.drive_helpers import CONTROL_N
+from openpilot.selfdrive.controls.lib.drive_helpers import CONTROL_N, apply_deadzone, interp
 from openpilot.common.pid import PIDController
 from openpilot.selfdrive.modeld.constants import ModelConstants
 
@@ -80,8 +80,10 @@ class LongControl:
       self.reset()
 
     else:  # LongCtrlState.pid
+      deadzone = interp(CS.vEgo, self.CP.longitudinalTuning.deadzoneBPDEPRECATED, self.CP.longitudinalTuning.deadzoneVDEPRECATED)
       error = a_target - CS.aEgo
-      output_accel = self.pid.update(error, speed=CS.vEgo,
+      error_deadzone = apply_deadzone(error, deadzone)
+      output_accel = self.pid.update(error_deadzone, speed=CS.vEgo,
                                      feedforward=a_target)
 
     self.last_output_accel = np.clip(output_accel, accel_limits[0], accel_limits[1])