USAA for Auto buying, details?

I used TrueCar through USAA and saved like $1,500 on my vehicle purchase a few months ago

I'm not too sure what you are asking about. USAA does there own financing for Auto loans I have used them to refinance auto loans before. They do have discount for car rentals.

I did USAA once on a new car. Pretty seamless. You get a price on USAA. If you like it, then you can either work with their financing, someone else, or if you have cash, fine. Do check the COSTCO price. It may be a touch lower, BUT, COSTCO requires a kickback. If you're armed with both numbers, dealerships will usually match the price but will say please don't buy through a required kickback entity. Do ask which dealerships in your region actually do these things. I recall in the Seattle area, about 3 Ram dealerships specialized in USAA and actually had a lower price vs. others down the road. Finally, take a look at what's been sitting on their lot for over a month. Armed with the pricing, you can likely push lower as their pucker factor is increasing. However, if you want a very specific build, then you won't likely get any further discounts.