Official General Motors Corporation service manuals are available online at GMFleet.com by clicking the Maintenance drop-down menu on the home page and then selecting Service/Owner's Manuals. Choose the GMC Service Manuals link under the Service Manuals heading.
Select Service and Owner Information on the Choose a Subject page. Choose the vehicle model and year from the drop-down menus, and select Shop/Service Information as the document type. Add the desired service manual to the shopping cart, and follow the prompts to complete the transaction online. Alternatively, click the GM Order Form link on the left of the page to print it out, and then mail the order request.