diff --git a/frogpilot/assets/download_functions.py b/frogpilot/assets/download_functions.py
index bf488c466..1298bbc90 100644
--- a/frogpilot/assets/download_functions.py
+++ b/frogpilot/assets/download_functions.py
@@ -29,13 +29,15 @@ def check_github_rate_limit():
     print(f"Error checking GitHub rate limit: {error}")
     return False
 
-def download_file(cancel_param, destination, progress_param, url, download_param, params_memory, allow_unknown_size=False):
+def download_file(cancel_param, destination, progress_param, url, download_param, params_memory, allow_unknown_size=False, suppress_errors=False):
   try:
     destination.parent.mkdir(parents=True, exist_ok=True)
 
-    total_size = get_remote_file_size(url)
+    total_size = get_remote_file_size(url, suppress_errors=suppress_errors or allow_unknown_size)
     if total_size == 0 and not allow_unknown_size:
       if not url.endswith(".gif"):
+        if suppress_errors:
+          return
         handle_error(None, "Download invalid...", "Download invalid...", download_param, progress_param, params_memory)
       return
 
@@ -68,15 +70,18 @@ def download_file(cancel_param, destination, progress_param, url, download_param
         temp_file_path.rename(destination)
 
   except Exception as error:
+    if suppress_errors:
+      return
     handle_request_error(error, destination, download_param, progress_param, params_memory)
 
-def get_remote_file_size(url):
+def get_remote_file_size(url, suppress_errors=False):
   try:
     response = requests.head(url, headers={"Accept-Encoding": "identity"}, timeout=10)
     response.raise_for_status()
     return int(response.headers.get("Content-Length", 0))
   except Exception as error:
-    handle_request_error(error, None, None, None, None)
+    if not suppress_errors:
+      handle_request_error(error, None, None, None, None)
     return 0
 
 def get_repository_url():
@@ -108,7 +113,7 @@ def handle_request_error(error, destination, download_param, progress_param, par
   handle_error(destination, f"Failed: {error_message}", error, download_param, progress_param, params_memory)
 
 def verify_download(file_path, url, allow_unknown_size=False):
-  remote_file_size = get_remote_file_size(url)
+  remote_file_size = get_remote_file_size(url, suppress_errors=allow_unknown_size)
 
   if remote_file_size == 0 and allow_unknown_size:
     if not file_path.is_file():
diff --git a/frogpilot/assets/theme_manager.py b/frogpilot/assets/theme_manager.py
index d9c6a4375..cfe4ba234 100644
--- a/frogpilot/assets/theme_manager.py
+++ b/frogpilot/assets/theme_manager.py
@@ -134,7 +134,7 @@ class ThemeManager:
       delete_file(theme_path)
 
       print(f"Downloading theme from GitHub: {theme_name}")
-      download_file(CANCEL_DOWNLOAD_PARAM, theme_path, DOWNLOAD_PROGRESS_PARAM, theme_url, asset_param, params_memory, allow_unknown_size=allow_unknown_size)
+      download_file(CANCEL_DOWNLOAD_PARAM, theme_path, DOWNLOAD_PROGRESS_PARAM, theme_url, asset_param, params_memory, allow_unknown_size=allow_unknown_size, suppress_errors=allow_unknown_size)
 
       if params_memory.get_bool(CANCEL_DOWNLOAD_PARAM):
         delete_file(theme_path)
@@ -362,7 +362,7 @@ class ThemeManager:
 
     theme_url = download_link + extension
     print(f"Downloading theme from GitLab: {theme_name}")
-    download_file(CANCEL_DOWNLOAD_PARAM, theme_path, DOWNLOAD_PROGRESS_PARAM, theme_url, asset_param, params_memory, allow_unknown_size=allow_unknown_size)
+    download_file(CANCEL_DOWNLOAD_PARAM, theme_path, DOWNLOAD_PROGRESS_PARAM, theme_url, asset_param, params_memory, allow_unknown_size=allow_unknown_size, suppress_errors=allow_unknown_size)
 
     if verify_download(theme_path, theme_url, allow_unknown_size=allow_unknown_size):
       print(f"Theme {theme_name} downloaded and verified successfully from GitLab!")
diff --git a/panda/board/safety/safety_gm.h b/panda/board/safety/safety_gm.h
index 9dd7554a3..2c3441156 100644
--- a/panda/board/safety/safety_gm.h
+++ b/panda/board/safety/safety_gm.h
@@ -112,29 +112,7 @@ bool gm_ascm_int = false;
 bool gm_force_brake_c9 = false;
 bool gm_remote_start_boots_comma = false;
 
-static void handle_gm_wheel_buttons(const CANPacket_t *to_push) {
-  int button = (GET_BYTE(to_push, 5) & 0x70U) >> 4;
-
-  // enter controls on falling edge of set or rising edge of resume (avoids fault)
-  bool set = (button != GM_BTN_SET) && (cruise_button_prev == GM_BTN_SET);
-  bool res = (button == GM_BTN_RESUME) && (cruise_button_prev != GM_BTN_RESUME);
-  if (set || res) {
-    controls_allowed = true;
-  }
-
-  // exit controls on cancel press
-  if (button == GM_BTN_CANCEL) {
-    controls_allowed = false;
-  }
-
-  cruise_button_prev = button;
-}
-
 static void gm_rx_hook(const CANPacket_t *to_push) {
-  if ((GET_BUS(to_push) == 2U) && (GET_ADDR(to_push) == 0x1E1) && (gm_hw == GM_SDGM)) {
-    // SDGM buttons are on bus 2
-    handle_gm_wheel_buttons(to_push);
-  }
   if (GET_BUS(to_push) == 0U) {
     int addr = GET_ADDR(to_push);
 
@@ -152,9 +130,23 @@ static void gm_rx_hook(const CANPacket_t *to_push) {
       vehicle_moving = (left_rear_speed > GM_STANDSTILL_THRSLD) || (right_rear_speed > GM_STANDSTILL_THRSLD);
     }
 
-    // ACC steering wheel buttons (GM_CAM and GM_SDGM are tied to the PCM)
-    if ((addr == 0x1E1) && (!gm_pcm_cruise || gm_cc_long) && (gm_hw != GM_SDGM)) {
-      handle_gm_wheel_buttons(to_push);
+    // ACC steering wheel buttons (GM_CAM is tied to the PCM)
+    if ((addr == 0x1E1) && (!gm_pcm_cruise || gm_cc_long)) {
+      int button = (GET_BYTE(to_push, 5) & 0x70U) >> 4;
+
+      // enter controls on falling edge of set or rising edge of resume (avoids fault)
+      bool set = (button != GM_BTN_SET) && (cruise_button_prev == GM_BTN_SET);
+      bool res = (button == GM_BTN_RESUME) && (cruise_button_prev != GM_BTN_RESUME);
+      if (set || res) {
+        controls_allowed = true;
+      }
+
+      // exit controls on cancel press
+      if (button == GM_BTN_CANCEL) {
+        controls_allowed = false;
+      }
+
+      cruise_button_prev = button;
     }
 
     // Reference for brake pressed signals:
diff --git a/selfdrive/car/gm/carstate.py b/selfdrive/car/gm/carstate.py
index 9c768e9cf..e5ba43391 100644
--- a/selfdrive/car/gm/carstate.py
+++ b/selfdrive/car/gm/carstate.py
@@ -237,7 +237,7 @@ class CarState(CarStateBase):
         ]
         if CP.enableBsm:
           messages.append(("BCMBlindSpotMonitor", 10))
-      elif CP.carFingerprint not in ASCM_INT:
+      elif CP.carFingerprint not in (SDGM_CAR | ASCM_INT):
         messages += [
           ("AEBCmd", 10),
         ]
diff --git a/selfdrive/car/gm/interface.py b/selfdrive/car/gm/interface.py
index 34cd87958..f6748f7b2 100644
--- a/selfdrive/car/gm/interface.py
+++ b/selfdrive/car/gm/interface.py
@@ -238,7 +238,8 @@ class CarInterface(CarInterfaceBase):
         ret.openpilotLongitudinalControl = True
         gm_safety_cfg.safetyParam |= Panda.FLAG_GM_HW_CAM_LONG
     elif candidate in SDGM_CAR:
-      ret.experimentalLongitudinalAvailable = candidate not in CC_ONLY_CAR or has_sascm(fingerprint)
+      # kaofui parity: SDGM cars require SASCM for experimental long
+      ret.experimentalLongitudinalAvailable = candidate not in (CC_ONLY_CAR | ASCM_INT | SDGM_CAR) or has_sascm(fingerprint)
       ret.networkLocation = NetworkLocation.fwdCamera
       ret.radarUnavailable = 0x460 not in fingerprint.get(CanBus.OBSTACLE, {})
       ret.pcmCruise = True
@@ -268,7 +269,8 @@ class CarInterface(CarInterfaceBase):
         ret.experimentalLongitudinalAvailable = False
         ret.pcmCruise = False
     elif candidate in ASCM_INT:
-      ret.experimentalLongitudinalAvailable = candidate not in CC_ONLY_CAR or has_sascm(fingerprint)
+      # kaofui parity: ASCM_INT cars require SASCM for experimental long
+      ret.experimentalLongitudinalAvailable = candidate not in (CC_ONLY_CAR | ASCM_INT | SDGM_CAR) or has_sascm(fingerprint)
       ret.networkLocation = NetworkLocation.fwdCamera
       ret.radarUnavailable = 0x460 not in fingerprint.get(CanBus.OBSTACLE, {})
       ret.pcmCruise = True