The repair business is sweet cash for auto companies, at least at GM (circa 1999 when I worked on this) and I assume others... Post market parts had 2 different prices, 1 for authorized dealers and 1 for parts stores/independent shops. Care to take a guess which one GM made pay more??
You got, your GM Dealer paid more for an ACDelco/EPIC part than Autozone did for the same part. In fact the price differencial was so great at times, that your local GM Dealer would go to someplace like Autozone and buy the part from them, because even with their markup it was still cheaper than ordering the part from GM directly for them. And you wonder why they went bankrupt.
“In fact the price differencial was so great at times, that your local GM Dealer would go to someplace like Autozone and buy the part from them, because even with their markup it was still cheaper than ordering the part from GM directly for them.”
No surprise there...