diff --git a/board/main.c b/board/main.c
index e46a38856317e8..d633ccdf68e9d0 100644
--- a/board/main.c
+++ b/board/main.c
@@ -104,7 +104,14 @@ int get_health_pkt(void *dat) {
 
 #ifdef PANDA
   health->current = adc_get(ADCCHAN_CURRENT);
-  health->started = (GPIOA->IDR & (1 << 1)) == 0;
+  int safety_ignition = safety_ignition_hook();
+  if (safety_ignition < 0) {
+    //Use the GPIO pin to determine ignition
+    health->started = (GPIOA->IDR & (1 << 1)) == 0;
+  } else {
+    //Current safety hooks want to determine ignition (ex: GM)
+    health-> started = safety_ignition;
+  }
 #else
   health->current = 0;
   health->started = (GPIOC->IDR & (1 << 13)) != 0;
@@ -534,8 +541,8 @@ int main() {
   usb_init();
 
   // default to silent mode to prevent issues with Ford
-  safety_set_mode(SAFETY_NOOUTPUT, 0);
-  can_silent = ALL_CAN_SILENT;
+  safety_set_mode(SAFETY_GM, 0);
+  can_silent = ALL_CAN_LIVE;
   can_init_all();
 
   adc_init();
diff --git a/board/safety.h b/board/safety.h
index dc824ba53c09f0..ff249235e026bc 100644
--- a/board/safety.h
+++ b/board/safety.h
@@ -1,14 +1,17 @@
 void safety_rx_hook(CAN_FIFOMailBox_TypeDef *to_push);
 int safety_tx_hook(CAN_FIFOMailBox_TypeDef *to_send);
 int safety_tx_lin_hook(int lin_num, uint8_t *data, int len);
+int safety_ignition_hook();
 
 typedef void (*safety_hook_init)(int16_t param);
 typedef void (*rx_hook)(CAN_FIFOMailBox_TypeDef *to_push);
 typedef int (*tx_hook)(CAN_FIFOMailBox_TypeDef *to_send);
 typedef int (*tx_lin_hook)(int lin_num, uint8_t *data, int len);
+typedef int (*ign_hook)();
 
 typedef struct {
   safety_hook_init init;
+  ign_hook ignition;
   rx_hook rx;
   tx_hook tx;
   tx_lin_hook tx_lin;
@@ -38,6 +41,13 @@ int safety_tx_lin_hook(int lin_num, uint8_t *data, int len){
   return current_hooks->tx_lin(lin_num, data, len);
 }
 
+// -1 = Disabled (Use GPIO to determine ignition)
+// 0 = Off (not started)
+// 1 = On (started)
+int safety_ignition_hook() {
+  return current_hooks->ignition();
+}
+
 typedef struct {
   uint16_t id;
   const safety_hooks *hooks;
diff --git a/board/safety/safety_defaults.h b/board/safety/safety_defaults.h
index b7b4d37295c9c9..d8433c7aa3a6b5 100644
--- a/board/safety/safety_defaults.h
+++ b/board/safety/safety_defaults.h
@@ -14,11 +14,16 @@ static int nooutput_tx_lin_hook(int lin_num, uint8_t *data, int len) {
   return false;
 }
 
+static int nooutput_ign_hook() {
+  return -1;
+}
+
 const safety_hooks nooutput_hooks = {
   .init = nooutput_init,
   .rx = default_rx_hook,
   .tx = nooutput_tx_hook,
   .tx_lin = nooutput_tx_lin_hook,
+  .ignition = nooutput_ign_hook
 };
 
 // *** all output safety mode ***
@@ -35,10 +40,15 @@ static int alloutput_tx_lin_hook(int lin_num, uint8_t *data, int len) {
   return true;
 }
 
+static int alloutput_ign_hook() {
+  return -1;
+}
+
 const safety_hooks alloutput_hooks = {
   .init = alloutput_init,
   .rx = default_rx_hook,
   .tx = alloutput_tx_hook,
   .tx_lin = alloutput_tx_lin_hook,
+  .ignition = alloutput_ign_hook
 };
 
diff --git a/board/safety/safety_elm327.h b/board/safety/safety_elm327.h
index b9af35ebdc5016..a284af498f394f 100644
--- a/board/safety/safety_elm327.h
+++ b/board/safety/safety_elm327.h
@@ -31,9 +31,14 @@ static void elm327_init(int16_t param) {
   controls_allowed = 1;
 }
 
+static int elm327_ign_hook() {
+  return -1;
+}
+
 const safety_hooks elm327_hooks = {
   .init = elm327_init,
   .rx = elm327_rx_hook,
   .tx = elm327_tx_hook,
   .tx_lin = elm327_tx_lin_hook,
+  .ignition = elm327_ign_hook
 };
diff --git a/board/safety/safety_gm.h b/board/safety/safety_gm.h
index 50671d950d416a..042c02738a6d1b 100644
--- a/board/safety/safety_gm.h
+++ b/board/safety/safety_gm.h
@@ -16,8 +16,9 @@ int gm_speed = 0;
 // silence everything if stock ECUs are still online
 int gm_ascm_detected = 0;
 
-static void gm_rx_hook(CAN_FIFOMailBox_TypeDef *to_push) {
+int gm_ignition_started = 0;
 
+static void gm_rx_hook(CAN_FIFOMailBox_TypeDef *to_push) {
   uint32_t addr;
   if (to_push->RIR & 4) {
     // Extended
@@ -29,6 +30,12 @@ static void gm_rx_hook(CAN_FIFOMailBox_TypeDef *to_push) {
     addr = to_push->RIR >> 21;
   }
 
+  if (addr == 0x135) {
+    //Gear selector (used for determining ignition)
+    int gear = to_push->RDLR & 0x7;
+    gm_ignition_started = gear > 0; //Park = 0. If out of park, we're "on."
+  }
+
   // sample speed, really only care if car is moving or not
   // rear left wheel speed
   if (addr == 842) {
@@ -170,6 +177,11 @@ static int gm_tx_lin_hook(int lin_num, uint8_t *data, int len) {
 
 static void gm_init(int16_t param) {
   controls_allowed = 0;
+  gm_ignition_started = 0;
+}
+
+static int gm_ign_hook() {
+  return gm_ignition_started;
 }
 
 const safety_hooks gm_hooks = {
@@ -177,5 +189,6 @@ const safety_hooks gm_hooks = {
   .rx = gm_rx_hook,
   .tx = gm_tx_hook,
   .tx_lin = gm_tx_lin_hook,
+  .ignition = gm_ign_hook
 };
 
diff --git a/board/safety/safety_honda.h b/board/safety/safety_honda.h
index bf30d847079e09..b7c24b1e9b8138 100644
--- a/board/safety/safety_honda.h
+++ b/board/safety/safety_honda.h
@@ -119,10 +119,15 @@ static void honda_init(int16_t param) {
   controls_allowed = 0;
 }
 
+static int honda_ign_hook() {
+  return -1;
+}
+
 const safety_hooks honda_hooks = {
   .init = honda_init,
   .rx = honda_rx_hook,
   .tx = honda_tx_hook,
   .tx_lin = honda_tx_lin_hook,
+  .ignition = honda_ign_hook
 };
 
diff --git a/board/safety/safety_toyota.h b/board/safety/safety_toyota.h
index 9ddaf172bb47ee..8fa9ce874bad13 100644
--- a/board/safety/safety_toyota.h
+++ b/board/safety/safety_toyota.h
@@ -161,11 +161,16 @@ static void toyota_init(int16_t param) {
   dbc_eps_torque_factor = param;
 }
 
+static int toyota_ign_hook() {
+  return -1;
+}
+
 const safety_hooks toyota_hooks = {
   .init = toyota_init,
   .rx = toyota_rx_hook,
   .tx = toyota_tx_hook,
   .tx_lin = toyota_tx_lin_hook,
+  .ignition = toyota_ign_hook
 };
 
 static void toyota_nolimits_init(int16_t param) {
@@ -179,4 +184,5 @@ const safety_hooks toyota_nolimits_hooks = {
   .rx = toyota_rx_hook,
   .tx = toyota_tx_hook,
   .tx_lin = toyota_tx_lin_hook,
+  .ignition = toyota_ign_hook
 };