diff --git a/sqlmesh/integrations/dlt.py b/sqlmesh/integrations/dlt.py
index a2202bea02..146c91b661 100644
--- a/sqlmesh/integrations/dlt.py
+++ b/sqlmesh/integrations/dlt.py
@@ -214,9 +214,7 @@ def generate_incremental_model(
 
 def format_config(configs: t.Dict[str, str], db_type: str) -> str:
     """Generate a string for the gateway connection config."""
-    config = {
-        "type": db_type,
-    }
+    config: t.Dict[str, t.Any] = {}
 
     for key, value in configs.items():
         if key == "password":
@@ -226,6 +224,11 @@ def format_config(configs: t.Dict[str, str], db_type: str) -> str:
         else:
             config[key] = value
 
+    # Set db_type after iterating credentials so that credential attributes
+    # with a conflicting name (e.g. GCP service-account JSON contains
+    # "type": "service_account") cannot overwrite the connection type.
+    config["type"] = db_type
+
     # Validate the connection config fields
     invalid_fields = []
     try:
diff --git a/tests/cli/test_cli.py b/tests/cli/test_cli.py
index 938f90cc74..eff00a907f 100644
--- a/tests/cli/test_cli.py
+++ b/tests/cli/test_cli.py
@@ -1020,8 +1020,8 @@ def test_dlt_pipeline(runner, tmp_path):
 gateways:
   duckdb:
     connection:
-      type: duckdb
       database: {dataset_path}
+      type: duckdb
 default_gateway: duckdb
 
 # --- Model Defaults ---