I have been in Nissan parts for 20+ years. Manager last 16-17 years. I can do Nissan parts in my sleep. I have an opportunity for parts director at a GM, Cadillac dealership and the Chrysler, Jeep store close by. I know zero about Chevy parts, policies with GM, obsolescence returns, accrual, core returns, etc. Can you guys and gals give me some of what I am going to be up against as far as a learning curve? Is GM 'user friendly' ?

Thanks!