1997 Suburban. Turned on headlights and truck completely died

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check fuse Stop/Haz Haz. Flasher, Seat Belt Buzzer, Stop Lmps., A.B.S. Memory and the flasher itself.
https://www.google.com/search?q=1992+chevy+suburban+hazard+flasher+location

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)

Normally this condition is the result of a poor body ground connection. Testing for this can be deceiving. At the static(nothing on) condition, testing can show a good ground. However when a circuit is excited, it has a determined resistance and a set current flow. If the ground connection to this or a branch circuit is loose, corroded, or broken wire. This will allow just enough connection to show as being good, but not good enough to complete the circuit with the required amount of connection when energized.

In most 1993 Chevy Subrubans the headlights do not have an automatic option. It is possible to get this feature installed but factor settings do not have this option installed.------------------------------------------------------------------------------------
vas 5054a v19

At this website www.reliable-store.com I found all
complete guide,much better language, complete detail in 800+ pages, ..and they also have live chat for instant help feature

sounds like A/C compresser is seized

I had a 99 Suburban that did almost the same thing, it turned out to be the Catyletic Converters were plugged. Try taking the exhaust pipe loose at the manifold for test purposes. If it runs good with the pipes loose, that's the problem. Replace the Cat's. There were no codes for either, it would start and run nice for about 5 seconds, then run rough and then stall.

first thing to check is the headlight relay under the hood. the easiest way to check is to swap it with a non-essential relay of the same type, like the horn or a/c. if the headlights still don't work check for proper power and ground in the relay socket.

would be the relay sticking allowing the power to run lights even though there is no power triggering the relay would pay to get new relay and see what happens as is commin problem

haveyou checked you fuesable link wich is on the fire wall in the engine compartment it will be a red wire comming off of a sidwase dimond shaped block

get your test light and start in the fuse bos and start tracing your power wires its possible you have a burned out fuseable link.
later paul