[Baz]

My 2002 Silverado 4.8 (241K miles) wouldn't start last Friday, after I stopped for an errand.

I have to admit.....the engine had been exhibiting some sputtering on and off for the couple previous weeks.

I changed the fuel filter out a couple weeks ago and had planned on doing the spark plugs next.

What was odd was the "security" light came on...something I had never seen in 19 years of ownership.

With the help of my mechanic, we ruled out the fuel pump.

The truck is over at his place right now and hopefully he can get it figured out.

Prior to taking it to him, I attempted a couple "fixes" including the "relearn" procedure (turn key on for 10 min., turn off for 10 sec., try to start, repeat 2-3 more times) without any luck. I also tried to bypass the little connector under the clam shell over the ignition switch. Again - no luck.

I did not splice in a resistor, but left one with my mechanic to try.

Thought I'd throw it out to the bird collective for input.

GM went through a number of anti-theft systems. The one for my truck doesn't involve a special key other than just having the right cuts. There's a sensor inside the lock with a magnet and hall sensor thingy, according to what I have read.

TIA for any thoughts....