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GM Test Data Center
Test registration and/or data upload for General Motors dexos® and DEXRON™ proprietary tests are done through this website. Users of this web service must first create an account and wait for the accounts to be approved. To access Reference Test Services please use the hyperlink on the left menu of this page. Current News Items: A new version of the DEXRON Test Upload Manual, dated August 15, 2021, is available for download. A new version of the dexos Test Upload Manual, dated March 9, 2023, is available for download.
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