1999 Chevrolet Suburban interior lighting

Question edited for clarity.
Question moved to sub category.

check fuse Stop/Haz Haz. Flasher, Seat Belt Buzzer, Stop Lmps., A.B.S. Memory and the flasher itself.
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Fuse Box Diagram Chevrolet Suburban (GMT400; 1993 ...

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Fuse box diagram (location and assignment of electrical fuses and relays) for Chevrolet (Chevy) Suburban (GMT400; 1993, 1994, 1995, 1996, 1997, 1998, 1999)

Theft system has activated. Turn key on and leave on until light goes out (usually around 10 minutes) turn off then back on. Wait until light goes out then try to start it.

Shortage with interior light control . If you have a bypass button next to headlight switch try it.

Sounds to me like your light switch is faulty, however, check and remove all the door buttons to determine this, ensure that the wire/s are connected on the buttons and that the door is butting against them when closing.{ including the tail gate} Good luck

Door swich faulty change the switch

the suburban engine compartrment allows for avery large V8s to be installed within its interior and yes any 454 will fit

check all grounds

Check all doors for a sticking door open sense switch. Check all over-riding interior light activation switches are off. If all the above are ok, check for a sticking interior light relay.

you burned out body control module. will need replacement

If it is happening when you change the AC and Defroster Modes as Stated above, You have a Wire inside the Dash in this Location that has Shorted and is Grounding itselt to the Housing for the HVAC Controls. This could cause a fire. I would pull the HVAC Unit and try and Locate the Faulty wire Behind it.