I serviced it but the check ingine light still on

hi jr.
this is all i could find hope it helps you out.
1996 Pontiac Firebird distributor cap diagram Google Search

Car Won't Start Because of Anti-Theft System That Uses ...

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Car Won't Start and Security Light is On on Pontiac Firebird. Problems with the anti-theft systems using the raised-chip key can prevent the car from starting.

Security light was on and car won't start - CarGurus

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CarGurusJul 24, 2007 - Check to see if your key chip isnt worn out(small silver thing on top part... My 1994 pontic firebird won't start and I no everything works great on ...

Pontiac Firebird Questions - security light - CarGurus

www.cargurus.com > Questions > Pontiac > Firebird

CarGurusFeb 5, 2009 - Hi I've recently bought a pontiac firebird the car doesn't have keys as previous owner ... Security light was on and car won't start 3 answers.

91 Pontiac Firebird won't start (Pontiac Firebird)

answers.edmunds.com > Edmunds Answers

Jun 18, 2008 - My '91 Pontiac Trans AM GTA will not start. When I turn the key, the engine does nothing, as if the battery were dead or the clutch pedal wasn't ...

How long since a tune-up? Check for applicable trouble codes. To check codes, yourself, at the least, you need an obd2 code reader.

It is a ground problem. When you turn on your headlights, they are sharing the same ground that your brake and T/S lights are using. Check all ground connections to the body from all headlight and taillight wiring are connected and tight. If it doesn't affect your taillights, it may be in your T/S switch. Check your ground connections first.

Well the fuel filter would be an easy choice, but it could be something electrical.
You'll need to figure out if you are missing fuel pressure or spark when it stops running to know how to proceed.

Check out "Headlight Fix for the 4th Generation Firebird/Trans Am" (http://www.bfranker.badz28.com/headlightfix/).

Go to a local garage and get it scanned probably a misfire in one or multible cylinders

yes their the same to 02

Shift cable between shift lever and transmission is bad. You need to replace it.

throw it away