diff --git a/gems/aws-sdk-core/lib/aws-sdk-core.rb b/gems/aws-sdk-core/lib/aws-sdk-core.rb
index 4beb4c769b5..f9685d2373b 100644
--- a/gems/aws-sdk-core/lib/aws-sdk-core.rb
+++ b/gems/aws-sdk-core/lib/aws-sdk-core.rb
@@ -109,7 +109,15 @@
 # defaults
 require_relative 'aws-defaults'
 
-# plugins - loaded through service clients as needed.
+# plugins
+# loaded through building STS or SSO ..
+
+# aws-sdk-sts is included to support Aws::AssumeRoleCredentials
+require_relative 'aws-sdk-sts'
+
+# aws-sdk-sso is included to support Aws::SSOCredentials
+require_relative 'aws-sdk-sso'
+require_relative 'aws-sdk-ssooidc'
 
 module Aws
 
@@ -197,14 +205,3 @@ def eager_autoload!(*args)
 
   end
 end
-
-# Autoload bundled service gems used in credential providers
-# need to ensure that the files are the local files from aws-sdk-core
-# and not the installed, legacy/dummy service gems.
-
-# aws-sdk-sts is included to support Aws::AssumeRoleCredentials
-Aws.autoload :STS, File.join(__dir__, 'aws-sdk-sts.rb')
-
-# aws-sdk-sso is included to support Aws::SSOCredentials
-Aws.autoload :SSO, File.join(__dir__, 'aws-sdk-sso.rb')
-Aws.autoload :SSOOIDC, File.join(__dir__, 'aws-sdk-ssooidc.rb')
diff --git a/gems/aws-sdk-resources/CHANGELOG.md b/gems/aws-sdk-resources/CHANGELOG.md
index eb62aa1e10f..18c0d12d68f 100644
--- a/gems/aws-sdk-resources/CHANGELOG.md
+++ b/gems/aws-sdk-resources/CHANGELOG.md
@@ -17,7 +17,6 @@ Unreleased Changes
 
 * Issue - Remove autoloads for service gems bundled in `aws-sdk-core` (STS, SSO, SSOOIDC).
 
-3.201.0 (2024-08-12)
 ------------------
 
 * Feature - Removed a dependency on the deprecated `aws-sdk-codestar` gem.
diff --git a/gems/aws-sdk-resources/bin/aws-v3.rb b/gems/aws-sdk-resources/bin/aws-v3.rb
index 44886eef2c4..9b77e69ea72 100755
--- a/gems/aws-sdk-resources/bin/aws-v3.rb
+++ b/gems/aws-sdk-resources/bin/aws-v3.rb
@@ -106,13 +106,11 @@ def env_bool key, default
 # The Aws namespace used to check autoload requires aws-sdk-resources.
 require 'aws-sdk-resources'
 
-# Finally load all of the gems.
-# Don't update the load path for gems bundled in core.
-core_gems = [:STS, :SSO, :SSOOIDC]
+# Finally load all of the gems. Core is loaded a second time because of STS.
 if File.directory?(File.expand_path('../../../../build_tools', __FILE__))
   gems = []
   Aws.constants.each do |const_name|
-    if Aws.autoload?(const_name) && !core_gems.include?(const_name)
+    if Aws.autoload?(const_name)
       gems << "aws-sdk-#{const_name.downcase}"
     end
   end
diff --git a/tasks/build.rake b/tasks/build.rake
index 138d4f2c8e1..8767374fc34 100644
--- a/tasks/build.rake
+++ b/tasks/build.rake
@@ -28,7 +28,6 @@ end
 # It is need to provide session credentials and assume role support.
 # Only building source, but not gemspecs, version file, etc.
 task 'build:aws-sdk-sts' do
-  Aws::STS if Aws.autoload?(:STS) # force autoload from core
   sts = BuildTools::Services.service('sts')
   generator = AwsSdkCodeGenerator::CodeBuilder.new(
     aws_sdk_core_lib_path: $CORE_LIB,
@@ -49,7 +48,6 @@ end
 # It is need to provide SSO Credentials.
 # Only building source, but not gemspecs, version file, etc.
 task 'build:aws-sdk-sso' do
-  Aws::SSO if Aws.autoload?(:SSO) # force autoload from core
   sso = BuildTools::Services.service('sso')
   generator = AwsSdkCodeGenerator::CodeBuilder.new(
     aws_sdk_core_lib_path: $CORE_LIB,
@@ -68,7 +66,6 @@ end
 # Aws::SSOOIDC is generated directly into the `aws-sdk-core` gem.
 # Only building source, but not gemspecs, version file, etc.
 task 'build:aws-sdk-ssooidc' do
-  Aws::SSOOIDC if Aws.autoload?(:SSOOIDC) # force autoload from core
   ssooidc = BuildTools::Services.service('ssooidc')
   generator = AwsSdkCodeGenerator::CodeBuilder.new(
     aws_sdk_core_lib_path: $CORE_LIB,
diff --git a/tasks/update-aws-sdk-dependencies.rake b/tasks/update-aws-sdk-dependencies.rake
index bbd8774304d..c3c11e494f5 100644
--- a/tasks/update-aws-sdk-dependencies.rake
+++ b/tasks/update-aws-sdk-dependencies.rake
@@ -19,13 +19,11 @@ task 'update-aws-sdk-dependencies' do
   )
 
   # update the module autoloads
-  # Remove service gems bundled in core (eg, sts) that have gem_name of aws-sdk-core.
-  autoload_services = BuildTools::Services.select { |svc| svc.gem_name != 'aws-sdk-core' }
   BuildTools.replace_lines(
     filename: "#{$GEMS_DIR}/aws-sdk-resources/lib/aws-sdk-resources.rb",
     start: /# service gems/,
     stop: /# end service gems/,
-    new_lines: autoload_services.map { |service|
+    new_lines: BuildTools::Services.map { |service|
       "  autoload :#{service.name}, '#{service.gem_name}'\n"
     }
   )