"Training Internal Auditors" Good Luck! and be carefull, there are some customer specific requirments that sometimes slip through if you supply at the tier 1 level for GM or Ford. Ford C/S (4.39.1) States auditors will be trained AND EVALUATED (This Means Some Type of Exam, Test or Other Evaluation) in the following: ISO/TS 16949, Related "Core Tools", Applicable Customer Specifics and the Automotive Process Approach to Auditing.
And as part of the training, participate in practice sessions equivalent to one day in: Case Study, Role-Play etc. Ford also specifies who may conduct this training. Where GM is your tier one customer they state that your internal auditor will as a minimun meet the requirements if ISO-19011. Without this training it will be hard to satisfy without evidence. You may be thinking "No big deal" however the process approach to auditing will face a challange with the integrity of Management Reviews where the input from internal auditing comes into question because the auditors may not have met all the customer specific requirements. If the audit is then suspect, this creates a chain reaction or domino effect because the the out-put from Management Review (Corrective & Preventive Actions) now come into question and so on and so on.
Good Luck:
Ragnar.