Check plugs and plug wires---worked for mine.
Partially clogged fuel filter or weak fuel pump. Replace the fuel filter.
If it starts at all I'd say it isn't the key, check the MAF sensor.
I have one of these change fuel filter
Could be as simple as a clogged fuel filter.
Sounds like your theft deterent system is engaged; for that you will need to go to the dealer (tow car to dealer). My 1996 had the same problem. They will have to replace the module in the dash or re-work it.
Had same problem on my 03. Replaced the fuel and air filter and had plugs replaced. Ran like new after. Dont know which its was but a place to start.
carb. adjustment, oil my need to be changer, air filter is dirty. fuel filter needs to be replaced
Sounds like it's not getting enough fuel or a filter is clogged. Try having your fuel ejection flushed and fuel filter changed!
It could be as simple as a very dirty fuel filter.
It could be the computer which controls your engine. That happened to my 97 Grand Am, and it ended up shutting down in the middle of the road.
Your 1991 4.3 S10 starts for about 3 seconds then shuts down because it is faulty. Take it to mechanic to have it checked.