Need help with remote start on 2002 Tahoe

[99-2door]

I am installing a remote start in my brother's 2002 Tahoe z-71. I am using a DEI 555L PASSLOCK II by-pass. I have everything hooked up right I think but the starter will only crank the engine won't fire up and run.

Does somebody knoe the wires I should be using so that I can check everything??

Thanks

[x6369x]

I have a couple ?'s:

What alarm are you using?

Have you tried to remote start it with the key in the ignition?

[99-2door]

Yes, I tried it with the key in the ignition. It doesn't work that way either.

[x6369x]

Check the wiring of the 555L. Also, where did you catch the tach wire at?