diff --git a/opendbc_repo/opendbc/car/gm/values.py b/opendbc_repo/opendbc/car/gm/values.py
index 6dfc3be3..344b53e2 100644
--- a/opendbc_repo/opendbc/car/gm/values.py
+++ b/opendbc_repo/opendbc/car/gm/values.py
@@ -232,7 +232,7 @@ class CAR(Platforms):
   )
   CHEVROLET_VOLT = GMASCMPlatformConfig(
     [GMCarDocs("Chevrolet Volt 2017-18", min_enable_speed=0, video="https://youtu.be/QeMCN_4TFfQ")],
-    GMCarSpecs(mass=1607, wheelbase=2.69, steerRatio=17.7, centerToFrontRatio=0.45, tireStiffnessFactor=0.469, minEnableSpeed=-1),
+    GMCarSpecs(mass=1607, wheelbase=2.69, steerRatio=15.7, centerToFrontRatio=0.45, tireStiffnessFactor=0.469, minEnableSpeed=-1),
     dbc_dict={
       Bus.pt: "gm_global_a_powertrain_volt",
       Bus.radar: "gm_global_a_object",