i have a 2001 silverado and somehow while programming it i belive it went into theft mode cause the fuel pump now dont kick on and the security light aslong with battary and low fuel light all blink and when you go to start the truck it cranks over just wont fire up and when i plug my code reader in it says operation error and wont let me read it ive checked all the fuses there all good i dont know what happened

 

What were you using to program it?

 

Computer is blank an error occurred during programming. Depending on what you are using for programming it may be savable. Best case dealer or vendor here will have to reflash pcm to OEM. Worst case you nuked it and gotta find another pcm

 

Yep, check battery voltage and charge if needed then try to flash it again.