[ Home > Books & CD-ROMs > Repair & Maintenance > Diagnostics ] A BlueHummer Original Basic troubleshooting and system diagnostic procedures. $35.00 Copyright© 2003 - 2010 BlueHummer Outfitters All rights reserved. Hummer brand is registered by GM and/or AM General. BlueHummer Outfitters is neither affiliated with nor endorsed by GM and/or AM General. Last Update: March 8, 2010