98 blazer, had to remove the dash to fix the ac door control, got it all together, now it just cranks and cranks and cranks.....Have verified spark, checked distributor cap looked good....did plugs and wires....still nothing just cranks and cranks and cranks.....does that sound like anything that would be controled by something behind the dash>

 

Are you hearing the fuel pump running when you first turn the key? If not look to the relay in the glovebox. You can check fuel pump with the red wire near the firewall on the driver side. Jump that to the + terminal on the battery to verify the pump is good. If you can hear the pump running by doing this, it is a bad relay.

 

I can hear the pump start to prime when i put the key to the on position, and it does it again when i take it off the on position to off

 

It maybe that passkey feature. Not sure if Blazers have them or not, but its a lead none the less. Double check all your wires and try again.

(For sure you have fuel and power to your engine, but idk if there is any spark)

 

I pulled the plugs to test for spark and it has spark as well; whats the passkey feature?

Also put a new batttery in it

 

Anti-theft With this the vehicle should start but not stay running. Is the theft light flashing?

 

The light comes on along with teh abs, then goes off within a few seconds, doesnt flash when i try to start the car

 

It maybe like my Malibu, where we have to wait 10 minutes with the keys in the ON position before it will start (works fine after that). Otherwise the vehicle is not getting fuel (which the PassKey will restrict when it suspects theft is occurring).

 

How would I bypass or GT rid of the passkey feature

 

As stated previously, the passlock (or passkey as stated above) system will not prevent the engine from starting, but will shut the engine down after 3 seconds of run time. This does not sound like a passlock problem to me.

I'll state the obvious. If it was running before you tore it apart, it has to be something that you messed with. I would go over every electrical connection that was disconnected including the grounds at the firewall. Check over all of the fuses in each glove box with a multimeter set to read conductivity.