1997 chevy suburban head lights won't turn on but running and dash lights do work

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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)

Check the tail light bulbs, check to make sure the dash lighting switch is turned up but not turned so far up that the interior lights come on when the door is closed.

Try replacing the flasher.I can't remember if a 97 has a separate hazard flasher or a multifunction type.(my 99 Chevy work truck has a multifunction type-a little black box resembling a relay in the under-dash fuse panel).

does the motor crank when key is turned?If so check for a spark at the plugs.Get an auto electrician bypass your alarm

The tail lights run through the headlight switch, they also run through the combination switch(turn signals) that is a known issue for those trucks try messing with the hazard light switch and see if the start functioning, also if you have a tow package the lights have seconday fuses and relay in the electrical box under the hood

ck power to head light switch,,with test light,,power in ,,then switch to parking,,prob wires to see witch ones have power,,then ,,turn on head lights,,and repeat,,if power goes into switch power must come out when headlight switch is turned on,,also ck at starter to see if there is not a broken wire their,,sorry no diagrams,,

LOWER REAR HATCH SHOULD BE TWO SCREWS ON SIDE OF LIGHT REMOVE AND TAKE LIGHT OFF MIDDLE LIGHT SHOULD BE SIGNAL LIGHT BULB PUSH TAB AND TURN LEFT TO REMOVE REPLACE BULB .

Have you checked the breaklight switch under the dash? It works off the break peddel arm it could be bad or out of ajustment.

Check all the fuses. Could be a bad relay for the head lights.

the brown wire on your suburban will be your park lights and the yellow will be brake/turn are you sure the green wire is ground on your led lights? i would think the black wire would be ground