remote start alarm

I'm looking to install a remote alarm on a 03 cadillac cts.I was wondering what all do i need from for that.I know that i need that bypass module for the ignition.The car also has an factory alarm too!!!!

A bypass is a required item, I recommend the GMDL-BP. A wiring chart would make the job easier too, so here is what DEI lists: DIRECTWIRE™ WIRING INFORMATION - CADILLAC / CTS / 2003 / Remote Start [PRINT THIS PAGE] 12volts      RED / white (x2)(10A each)       +       ignition harness Starter      yellow       +       ignition harness Second Starter      N/A             Ignition      pink       +       ignition harness Second Ignition      N/A             Third Ignition      N/A             Accessory      orange       +       ignition harness Second Accessory      brown       +       ignition harness Keysense      lt. green       -       pin B10, brown plug at DIM Notes: The DIM (Dash Integration Module) is under the glove box. Power Lock      ORANGE / black       -       door lock switch in driver door Notes: Can also use Directed interface module. Power Unlock      ORANGE / black       -       door lock switch in driver door Notes: Can also use Directed interface module. Lock Motor      gray             driver door module in door Unlock Motor      tan             driver door module in door Parking Lights+      DO NOT USE             Parking Lights-      BROWN / white       -       pin B3, brown plug at DIM Notes: The DIM (Dash Integration Module) is under the glove box. Hazards      lt. blue       -       pin A9, brown plug at DIM Notes: The DIM (Dash Integration Module) is under the glove box. Turn Signal(L)      lt. blue/white       +       turn signal switch Turn Signal(R)      dk. blue/white       +       turn signal switch Reverse Light      lt. green       +       LR fuse box under rear seat Door Trigger      gray       -       underdash light Notes: Individual door triggers are in each door at their respective door modules. The driver door trigger is tan, the RF door is lt. green, the LR door is dk. blue/white, and the RR door is yellow/black. Use all four wires and diode isolate each wire from each other and the door modules. Refer to DirectFax document 1076 for wiring information. Dome Supervision      comes on with disarm             Trunk/Hatch Pin      gray or ORANGE / black       -       pin B3, red plug at RIM Notes: The RIM (Rear Integration Module) is on the passenger side rear deck. Hood Pin      pnk/blk (export model only)       -       pin B1, brown plug at DIM Notes: The DIM (Dash Integration Module) is under the glove box. Trunk/Hatch Release      lt. blue       -       pin B4, brown plug at RIM Notes: The RIM (Rear Integration Module) is on the passenger side rear deck. Power Sliding Door      N/A             Factory Alarm Arm      yellow (export model only)       -       driver door module in door Notes: Can also use Directed interface module. Factory Alarm Disarm      lt. green       -       driver door module in door Notes: Can also use Directed interface module. Disarm No Unlock      see factory alarm disarm             Tachometer      white       ac       pin 35, connector 2 at ECM Notes: The ECM (Engine Control Module) is on the passenger side of the motor under the cover. The tachometer wire can also be found at the instrument cluster. Wait to start      N/A             Brake Wire      lt. blue/white       +       brake pedal switch Parking Brake      lt. blue       -       parking brake switch Horn Trigger      tan       -       pin A6, gray plug at DIM Notes: The DIM (Dash Integration Module) is under the glove box. Memory Seat 1      white       -       memory seat switch in door Memory Seat 2      purple       -       memory seat switch in door Memory Seat 3      N/A       -       Interface Module:      Category: Immobilizer Bypass      Required: Yes      Type: PASS-Key III+ Part #: 1100F Alternate Part1 #: 1100X Alternate Part2 #: 556UW Alternate Part3 #: DesignTech 20402 Alternate Part4 #: DesignTech 29402 Notes: Not required if using the combo interface module. When using the 1100F or 1100X, a software change to 1100GM is needed. Interface Module:      Category: Combo Interface      Required: Yes      Type: Data Bus Part #: 1700G Alternate Part1 #: 457GW Notes: Smart Starter Kill Relays: Not Available warning       This wiring information is being provided free of charge on an "as is" basis, without any representation or warranty. It is your responsibility to verify any circuit before interfacing with it using a digital multimeter. Directed Electronics assumes no responsibility with regards to the accuracy or currency of this information. Proper installation in every case is and remains the responsibility of the installer. DEI assumes no liability or responsibility resulting from improper installation, even in reliance upon this information. Installer, IT support, and FFL. I need less hobbies.