Fuse to suburban cigarette lighter/power locks keeps blowing.

Possibly but more likely you've disturbed the wiring and it is now causing a short circuit

door locks and cig lighter ARE NOT on same circuit. Maybe lighter is broken and blowing fuse.

when the lighter is not pushed in does the fuse still blow? If not get a new plug in bit. Try some other plug in unit (GPS--dash cam--tyre compressor) or anything that uses a plug for the cigarette lighter and see it the fuse still blows.

look inside the socket coin fall into the socket

maybe a bad lighter socket or wires in the back of it.
You don't have to remove the center console to check the cigarette lighter electrical connection. Just pluck the base out of the hole and you will know if it is connected properly back there ....Or replace it. Not big bucks at all :)

Probably a 15 to 20 amps..If you use the cigarette lighter does it also blow the fuse ,you may have a short in the circuit..It should be able to handle the GPS..Dont increase the fuse size,you can cause bigger problems

My wiring diagram only says "underhood", and also indicates that there's an I/P (interior/passenger)
relay box as well.
The cigarette lighter fuse in a 2003 Suburban is identified as a 15 Amp fuse.

Welcome to FixYa.com,
Have you checked the fuse ?
Take a 12 volt test light and check each side of the fuse no light to one side could mean the fuse is blow, Regards, Lee

First off the reason for instant fuse blow is because this is a positive wire grounding out or touching/crossing a grounded surface. I would first target the Cig lighter outlet connections also if the outlet is rusty inside looking, replace it.

the cig lighter might be shorting out and cauding the other problem. sell the car and buy a toyota.