diff --git a/generator/gm/gm_global_a_powertrain.dbc b/generator/gm/gm_global_a_powertrain.dbc
index 4d03e6ed64..fbe0bd397d 100644
--- a/generator/gm/gm_global_a_powertrain.dbc
+++ b/generator/gm/gm_global_a_powertrain.dbc
@@ -156,12 +156,13 @@ BO_ 489 EBCMVehicleDynamic: 8 K17_EBCM
  SG_ YawRate : 35|12@0- (0.625,0) [0|1] "" NEO
  SG_ YawRate2 : 51|12@0- (0.0625,0) [-2047|2047] "grad/s" NEO
 
-BO_ 352 VehicleIgnition: 5 XXX
- SG_ Ignition : 7|32@0+ (1,0) [0|4294967295] "" XXX
+BO_ 352 BCMImmobilizer: 5 K9_BCM
+ SG_ ImmobilizerInfo : 7|32@0+ (1,0) [0|4294967295] "" XXX
 
-BO_ 497 VehicleIgnitionAlt: 8 XXX
- SG_ Ignition : 5|1@0+ (1,0) [0|1] "" XXX
- SG_ ParkBrake : 36|1@0+ (1,0) [0|3] "" XXX
+BO_ 497 BCMGeneralPlatformStatus: 8 K9_BCM
+ SG_ SystemPowerMode : 1|2@0+ (1,0) [0|3] "" XXX
+ SG_ SystemBackUpPowerMode : 5|2@0+ (1,0) [0|3] "" XXX
+ SG_ ParkBrakeSwActive : 36|1@0+ (1,0) [0|3] "" XXX
 
 BO_ 501 ECMPRDNL2: 8 K20_ECM
  SG_ TransmissionState : 48|4@1+ (1,0) [0|7] "" NEO
@@ -296,11 +297,12 @@ CM_ BU_ K124_ASCM "Active Safety Control Module";
 CM_ SG_ 381 MSG17D_AccPower "Need to investigate";
 CM_ BO_ 190 "Length varies from 6 to 8 bytes by car";
 CM_ SG_ 190 GasPedalAndAcc "ACC baseline is 62";
-CM_ SG_ 352 Ignition "Non-zero when ignition is on";
+CM_ SG_ 352 ImmobilizerInfo "Non-zero when ignition or accessory mode";
 CM_ SG_ 451 GasPedalAndAcc2 "ACC baseline is 62";
 CM_ SG_ 481 ACCAlwaysOne "Usually 1 if the car is equipped with ACC";
 CM_ SG_ 562 FrictionBrakeUnavailable "1 when ACC brake control is unavailable. Stays high if brake command messages are blocked for a period of time";
-CM_ SG_ 497 Ignition "Describes ignition + preconditioning mode, noisy";
+CM_ SG_ 497 SystemPowerMode "Describes ignition";
+CM_ SG_ 497 SystemBackUpPowerMode "Describes ignition + preconditioning mode, noisy";
 CM_ SG_ 501 PRNDL2 "When ManualMode is Active, Value is 13=L1 12=L2 11=L3 ... 4=L10";
 CM_ SG_ 532 UserBrakePressure "can be lower than other brake position signals when the brakes are pre-filled from ACC braking and the user presses on the brakes. user-only pressure?";
 CM_ SG_ 608 ClusterSpeed "Cluster speed signal seems to match dash on newer cars, but is a lower rate and can be noisier.";
@@ -315,6 +317,8 @@ BA_DEF_DEF_  "BusType" "";
 BA_ "BusType" "CAN";
 BA_ "ProtocolType" "GMLAN";
 BA_ "UseGMParameterIDs" 0;
+VAL_ 497 SystemPowerMode 3 "Crank Request" 2 "Run" 1 "Accessory" 0 "Off";
+VAL_ 497 SystemBackUpPowerMode 3 "Crank Request" 2 "Run" 1 "Accessory" 0 "Off";
 VAL_ 481 DistanceButton 1 "Active" 0 "Inactive" ;
 VAL_ 481 LKAButton 1 "Active" 0 "Inactive" ;
 VAL_ 481 ACCButtons 6 "Cancel" 5 "Main" 3 "Set" 2 "Resume" 1 "None" ;
diff --git a/gm_global_a_powertrain_generated.dbc b/gm_global_a_powertrain_generated.dbc
index d8591b24c6..6ecb36f2fa 100644
--- a/gm_global_a_powertrain_generated.dbc
+++ b/gm_global_a_powertrain_generated.dbc
@@ -176,12 +176,13 @@ BO_ 489 EBCMVehicleDynamic: 8 K17_EBCM
  SG_ YawRate : 35|12@0- (0.625,0) [0|1] "" NEO
  SG_ YawRate2 : 51|12@0- (0.0625,0) [-2047|2047] "grad/s" NEO
 
-BO_ 352 VehicleIgnition: 5 XXX
- SG_ Ignition : 7|32@0+ (1,0) [0|4294967295] "" XXX
+BO_ 352 BCMImmobilizer: 5 K9_BCM
+ SG_ ImmobilizerInfo : 7|32@0+ (1,0) [0|4294967295] "" XXX
 
-BO_ 497 VehicleIgnitionAlt: 8 XXX
- SG_ Ignition : 5|1@0+ (1,0) [0|1] "" XXX
- SG_ ParkBrake : 36|1@0+ (1,0) [0|3] "" XXX
+BO_ 497 BCMGeneralPlatformStatus: 8 K9_BCM
+ SG_ SystemPowerMode : 1|2@0+ (1,0) [0|3] "" XXX
+ SG_ SystemBackUpPowerMode : 5|2@0+ (1,0) [0|3] "" XXX
+ SG_ ParkBrakeSwActive : 36|1@0+ (1,0) [0|3] "" XXX
 
 BO_ 501 ECMPRDNL2: 8 K20_ECM
  SG_ TransmissionState : 48|4@1+ (1,0) [0|7] "" NEO
@@ -316,11 +317,12 @@ CM_ BU_ K124_ASCM "Active Safety Control Module";
 CM_ SG_ 381 MSG17D_AccPower "Need to investigate";
 CM_ BO_ 190 "Length varies from 6 to 8 bytes by car";
 CM_ SG_ 190 GasPedalAndAcc "ACC baseline is 62";
-CM_ SG_ 352 Ignition "Non-zero when ignition is on";
+CM_ SG_ 352 ImmobilizerInfo "Non-zero when ignition or accessory mode";
 CM_ SG_ 451 GasPedalAndAcc2 "ACC baseline is 62";
 CM_ SG_ 481 ACCAlwaysOne "Usually 1 if the car is equipped with ACC";
 CM_ SG_ 562 FrictionBrakeUnavailable "1 when ACC brake control is unavailable. Stays high if brake command messages are blocked for a period of time";
-CM_ SG_ 497 Ignition "Describes ignition + preconditioning mode, noisy";
+CM_ SG_ 497 SystemPowerMode "Describes ignition";
+CM_ SG_ 497 SystemBackUpPowerMode "Describes ignition + preconditioning mode, noisy";
 CM_ SG_ 501 PRNDL2 "When ManualMode is Active, Value is 13=L1 12=L2 11=L3 ... 4=L10";
 CM_ SG_ 532 UserBrakePressure "can be lower than other brake position signals when the brakes are pre-filled from ACC braking and the user presses on the brakes. user-only pressure?";
 CM_ SG_ 608 ClusterSpeed "Cluster speed signal seems to match dash on newer cars, but is a lower rate and can be noisier.";
@@ -335,6 +337,8 @@ BA_DEF_DEF_  "BusType" "";
 BA_ "BusType" "CAN";
 BA_ "ProtocolType" "GMLAN";
 BA_ "UseGMParameterIDs" 0;
+VAL_ 497 SystemPowerMode 3 "Crank Request" 2 "Run" 1 "Accessory" 0 "Off";
+VAL_ 497 SystemBackUpPowerMode 3 "Crank Request" 2 "Run" 1 "Accessory" 0 "Off";
 VAL_ 481 DistanceButton 1 "Active" 0 "Inactive" ;
 VAL_ 481 LKAButton 1 "Active" 0 "Inactive" ;
 VAL_ 481 ACCButtons 6 "Cancel" 5 "Main" 3 "Set" 2 "Resume" 1 "None" ;