diff --git a/opendbc/gm_global_a_powertrain_generated.dbc b/opendbc/gm_global_a_powertrain_generated.dbc
index 040e08fc6..aba27f0df 100644
--- a/opendbc/gm_global_a_powertrain_generated.dbc
+++ b/opendbc/gm_global_a_powertrain_generated.dbc
@@ -232,6 +232,7 @@ BO_ 715 ASCMGasRegenCmd: 8 K124_ASCM
  SG_ GasRegenFullStopActive : 13|1@0+ (1,0) [0|0] ""  NEO
  SG_ GasRegenCmdActive : 0|1@0+ (1,0) [0|0] ""  NEO
  SG_ RollingCounter : 7|2@0+ (1,0) [0|0] ""  NEO
+ SG_ GasRegenAlwaysOne3 : 23|1@0+ (1,0) [0|1] ""  NEO
  SG_ GasRegenCmd : 8|14@0+ (1,0) [0|0] "" NEO
 
 BO_ 717 ASCM_2CD: 5 K124_ASCM
diff --git a/selfdrive/car/gm/gmcan.py b/selfdrive/car/gm/gmcan.py
index 4594ed128..f2a87bae4 100644
--- a/selfdrive/car/gm/gmcan.py
+++ b/selfdrive/car/gm/gmcan.py
@@ -66,6 +66,7 @@ def create_gas_regen_command(packer, bus, throttle, idx, enabled, at_full_stop):
     "GasRegenFullStopActive": at_full_stop,
     "GasRegenAlwaysOne": 1,
     "GasRegenAlwaysOne2": 1,
+    "GasRegenAlwaysOne3": 1,
   }
 
   dat = packer.make_can_msg("ASCMGasRegenCmd", bus, values)[2]