This tutorial combines the two articles:
How to Setup Domain used in Blogspot from GoDaddy to Namecheap
If you have successfully transferred your domain name used in Blogspot from GoDaddy to Namecheap, you will be able to see it in your Namecheap account.
1. Click Transfer DNS Back to Us under General sidebar menu.
2. Click All Host records under Host management
3. Change existing domain name server registration.
By default, it is set to specify custom DNS server and using goDaddy DNS.
4. Select “Use Namecheap Hosting DNS Servers”.
5. Click “Save Changes”.
Proceed to this tutorial: