Car overheated and the warning light turned on

This is going to vary depending on the part you buy and the door rate at the shop you have do it. However, assuming you use the OEM part and they charge $100.00 per hour it should be around $450.00 after all taxes and shop charges.

I attached all the info for your review including the process on how to replace the pump. Let us know if you have other questions.

Also, they are going to want to make sure the head did not warp when it overheated and they do that by testing the head gasket. Here is a guide that helps with that.

https://www.2carpros.com/articles/head-gasket-blown-test