I tried turning the key on/eng off waiting, then using the remote starter and got the same results.
I meant turn the ignition on and Keep it on, then remote start. This way, both keys are being read at crank time. The immobilizer in GM vehicles is referred to as a "passlock" system. And if activated, it will disrupt the fuel pump from working.
Bored block, Eagle Crank, XP Cam, Ported Heads/LIM/Blower/TB, 3.0 Pulley, CAI, Headers, 42.5#, AL 104's, etc...