1992 Chevrolet Suburban 1500 350 backfiring and headers glowing

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.
https://www.google.com/search?q=1992+chevy+suburban+hazard+flasher+location

Fuse Box Diagram Chevrolet Suburban (GMT400; 1993 ...

https://fuse-box.info > chevrolet > chevrolet-suburban-...
Fuse box diagram (location and assignment of electrical fuses and relays) for Chevrolet (Chevy) Suburban (GMT400; 1993, 1994, 1995, 1996, 1997, 1998, 1999)

You simply remove the old ones and make sure the new ones are gapped to the proper setting and install them.

Stop using it--- if not ruined already

You have a timing issue

Need to replace any timing belt,all oxygen sensors ruined
& exhaust converter when problem is resolved

obvously converter is pluged need to remove and verify if so install new one

Youll need a distributor inside the distributor is a reluctor that fire the injector one it displaces ,it pumps air in the catalytic and it get red hot glowing red hot. A whole new distributor

I have seen this happen in the past if the catalytic convertor is defective and needs replacement. I suggest you take your vehicle in to see if your catalytic convertor has broken down and needs replacement.

I hope this helps you out if it does please give me a YES that I did attempt to help you. Thank you

Check catalytic converter to see if it is glowing also. Could be stopped up not allowing exhaust gases to escape. Hopefully it will have two of them otherwise the right side should be glowing also if it is stopped up. Sometimes it will also have a funny smell like sulfur. Hope this helps. Converter is located beneath vehicle in-between manifolds and muffler(s) if dual system.

• It may be built into your mass airflow sensor (if its not in the air intake tube. Reference:chev tech
• I hope that is not one of those chips you can get on ebay, real they are a waste of money. there is not much you can do to improve fuel mileage.

yep change your thermostat

check the connection to constant (usually yellow wire). Also check the remote wire (usually red) make sure they are both hooked up to where they need to be