diff --git a/codegen/sdk-codegen/aws-models/iotfleetwise.json b/codegen/sdk-codegen/aws-models/iotfleetwise.json
index 3f1a1d074d7da..c51230baf22c8 100644
--- a/codegen/sdk-codegen/aws-models/iotfleetwise.json
+++ b/codegen/sdk-codegen/aws-models/iotfleetwise.json
@@ -7553,6 +7553,11 @@
       "type": "list",
       "member": {
         "target": "com.amazonaws.iotfleetwise#CreateVehicleRequestItem"
+      },
+      "traits": {
+        "smithy.api#length": {
+          "min": 1
+        }
       }
     },
     "com.amazonaws.iotfleetwise#createVehicleResponses": {
@@ -7749,6 +7754,11 @@
       "type": "list",
       "member": {
         "target": "com.amazonaws.iotfleetwise#UpdateVehicleRequestItem"
+      },
+      "traits": {
+        "smithy.api#length": {
+          "min": 1
+        }
       }
     },
     "com.amazonaws.iotfleetwise#updateVehicleResponseItems": {