’03 silverado, remote start wiring

ok, ive hooked up 99% of the wires. the only one i couldnt find is the 8pin red wire (+) says "locate the wire which is usually connected to the oil sensor on the dashboard" is that wire needed?

anyway, i tried to test the system as it was.. and so i plugged in all the connectors.. and absolutely nothing works.

1.) after reading the manual it tells me how to RS the truck, so i do this.. it actually works and attempts to start, fires, then dies.  And keeps trying to restart itself over and over as long as i have it armed. Now the book states if this happens to take my wire going to my tach and find a stronger signal, stating examples like oil sensor signal or alternator signal if tach wire isnt easy to locate. but i connected this to the white wire behind my cluster (the tach wire) any suggestions?

2.) door lock and unlock, absolutely nothing happens when i press the lock and unlock.. only changes the state of arming and disarming so i can RS the truck. Ive got my xk01 and my RS locks spliced into the lt blue wire at the lt blue plug @ bcm. and the unlocks of the 2 to the white wire at the bcm. (there are 2 white wires, i went to the one closest to the lt blue one)

3.) i have the xk01 all hooked up to my knowlege to be complete. the gwr wire must be correct in order for it to even bypass to start.. so that means thats correct.. my neutral safety wire is grounded with the truck.

So concluding, locks/unlocks arent doing crap to my truck, only beeping on my remote led screen, and my remote starter attempts to start, but just dies. please help!!

Further into my review of this i believe its not supposed to attempt to start with the door open.. well it was wide open and i attempted to start, and it still tried. This makes me believe my door triggers arent working correctly maybe?

When i try to lock or unlock my truck using the RS it beeps alot and freaks out on me telling me doors are open and such.

My parking lights as well do not come on for anything, and i believe are supposed to. i dont kno if its the door unlocking part as to why they arent but i have the white wire coming from my RS brain going to the gry/blk wire at the brown plug @ bcm, correct?

Now the door trigger/dome wires can be connected to my knowlege on other posts.. so i have these hooked up to the gry/blk wire on the lt blue plug at the bcm, to my knowlege is the door trigger? do i need to do the passenger trigger as well or what?

sorry for tons of questions, just lost in all the confusion

ok so i was confused about the locks/unlocks, just bein dumb and actually connecting all to the bcm :( , but the start still...

as soon as it cranks it dies.. is that the tach signal not good enough or what?

it says on my 7pin to connect a PURPLE / wht to the tach wire. and i have it connected to the white wire behind the cluster, which i believe is the tach wire.

is that what seems to be the problem though? or is it something else?

ok i dont understand how to test the brain if thats the problem, but my truck attempts to start so is it safe to say my neutral safety is grounded right, giving the xk01 power.. so its not that?  and my book said something about the tach wire bein low signal if this happens, but im connected to the white wire behind the cluster.. how can it not be? programming the tach is on its own.. im just stumped! 

The lock/unlock still doesnt work either. so im guessing it might just not gettin bypassed correctly.. i have xk01 > Rs locks and unlocks connected.. what would cause it to still not work? maybe this could solve the whole starting issue as well. 

i finally got a garage to work out of for a few days so post soon would help! thanks and sorry for a late come back on these.