2002 impala base

I am putting in a keyless entry and remote start need vehicle wire digarm

This Pictorial should help a bit : https://www.the12volt.com/installbay/forum_posts.asp?tid=131509

Here is a link to Bulldog Security for their wire guide listing : https://www.bulldogsecurity.com/bdnew/vehiclewiringdiagrams.aspx

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Soldering is fun!

It's also available in the "Vehicle Wiring" of this site:https://www.the12volt.com/installbay/forum_posts.asp?tid=4576

You just need to look!

2002 Chevrolet Impala - Vehicle Information

Item     Wire Color     Polarity     Wire Location
12 Volts     red (common 60A)     +     ignition harness
Second 12 Volts     red (common 60A)     +     ignition harness

Starter     yellow     +     ignition harness

Ignition     pink     +     ignition harness
Second Ignition     dk. green     +     ignition harness

Accessory     orange     +     ignition harness
Second Accessory     brown (power as accessory, or car will not crank)     +     ignition harness

Keysense     lt. green     -     ignition harness or BCM, gray 16 pin plug, pin B1
The BCM is under the driver side dash, above the parking brake lever.

Data Bus     yellow (resistor code), black (ground)     Passlock 2     Passlock sensor on ignition key cylinder

The keyless link wire is lt. green at the BCM, pink 24 pin plug, pin A11. The BCM is under the driver side dash, above the parking brake lever.

Can Bus Sw     purple (J1850 Class 2 Serial Data)     data     data link connector, black 16 pin plug, pin 2

Power Lock     ORANGE / black     - 470 ohms     BCM, gray 24 pin plug, pin B3

The BCM is under the driver side dash, above the parking brake lever.

Power Unlock     same as power lock     -     
Lock Motor     see notes

Installation of factory keyless upgrade alarm is not recommended on this vehicle because the door lock motor wires rest at approximately 7 volts.
Driver Unlock Motor     tan (for priority unlock only)     reverse     BCM, gray 24 pin plug, pin A12
The BCM is under the driver side dash, above the parking brake lever.

Passenger Unlock Motor     see lock motor notes
Factory Alarm Arm     arms on lock with door open
Factory Alarm Disarm     lt. green     -     BCM, gray 16 pin plug, pin B3
The BCM is under the driver side dash, above the parking brake lever.
Disarm No Unlock     see factory alarm disarm
Parking Lights (+)     yellow (F), BROWN / white (R)     +     junction block at passenger end of dash
Parking Lights (-)     white (must diode isolate from BCM)     -     BCM, pink 24 pin plug, pin A2
The BCM is under the driver side dash, above the parking brake lever. Must diode isolate this wire from the BCM to avoid Service Engine Soon light. See Tech Doc 1600 for wiring information.
Hazards     same as turn signals
Turn Signal (Left)     lt. blue (F), yellow (R)     +     turn signal switch
Turn Signal (Right)     dk. blue (F), dk. green (R)     +     turn signal switch
Headlight     yellow     -     BCM, gray 24 pin plug, pin B4
The BCM is under the driver side dash, above the parking brake lever.
Reverse Light     dk. blue     -     BCM, pink 24 pin plug, pin B6
The BCM is under the driver side dash, above the parking brake lever. Can also use lt. green (+) in the junction block at passenger end of dash.
Left Front Door Trigger     dk. blue (must diode isolate from BCM)     -     BCM, gray 16 pin plug, pin A8
The BCM is under the driver side dash, above the parking brake lever. Must diode isolate this wire from the BCM to prevent false alarms. See Tech Doc 1076 for wiring information.
Right Front Door Trigger     dk. blue/white (must diode isolate from BCM)     -     BCM, gray 16 pin plug, pin A1
The BCM is under the driver side dash, above the parking brake lever. Must diode isolate this wire from the BCM to prevent false alarms. See Tech Doc 1076 for wiring information.
Left Rear Door Trigger     same as right front door trigger
Right Rear Door Trigger     same as right front door trigger
Dome Light     gray     -     BCM, gray 24 pin plug, pin A8
The BCM is under the driver side dash, above the parking brake lever.

Trunk/Hatch Pin     RED / black (must diode isolate from BCM)     -     BCM, gray 24 pin plug, pin A11
The BCM is under the driver side dash, above the parking brake lever. Must diode isolate this wire from the BCM to prevent false alarms. See Tech Doc 1076 for wiring information.
Trunk/Hatch Release     black     -     BCM, gray 16 pin plug, pin A7
The BCM is under the driver side dash, above the parking brake lever.
Trunk Release Motor     lt. blue     +     BCM, gray 24 pin plug, pin A2
The BCM is under the driver side dash, above the parking brake lever.
Tachometer     white     ac     Ignition Ctrl Module, top center rear or top right front of engine
Fuel Pump     gray     +     junction block at passenger end of dash
Rear Defroster     white     - latched     HVAC Control Module
Mirror Defroster     same as rear defroster
Left Front Heated Seat     lt. blue     +     driver heated seat switch
Right Front Heated Seat     lt. blue/black     +     passenger heated seat switch
Speed Sense     dk. green     ac     BCM, gray 16 pin plug, pin B5
The BCM is under the driver side dash, above the parking brake lever.
Brake Wire     white     +     brake switch or steering column
Parking Brake     lt. green     -     BCM, gray 16 pin plug, pin B6
The BCM is under the driver side dash, above the parking brake lever.
Horn Trigger     black     -     BCM, pink 24 pin plug, pin B5
The BCM is under the driver side dash, above the parking brake lever.
Wipers     gray (low and high), yellow (ignition)     +     wiper switch
Left Front Window (Up/Down)     dk. blue - brown     A     driver window switch
Right Front Window (Up/Down)     lt. blue - tan     A     driver kick, door harness
Left Rear Window (Up/Down)     dk. green - purple     A     driver kick, door harness
Right Rear Window (Up/Down)     lt. green - purple     A     driver kick, door harness
Sun Roof (Open/Close)     brown - orange (function with ignition on only)     -     sunroof switch
Radio 12V     orange     +     radio
Radio Ground     black     -     radio
Radio Ignition     (Class 2 Serial Data)
Radio Illumination     gray (dimmer)     +     radio
Factory Amp Turn-on     same as power antenna
Power Antenna     white     +     radio
Left Front Speaker (+/-)     tan - gray     +,-     radio
If equipped, the amplifier is under the rear deck.
Right Front Speaker (+/-)     lt. green - dk. green     +,-     radio
Left Rear Speaker (+/-)     brown - yellow     +,-     radio
Right Rear Speaker (+/-)     dk. blue - lt. blue     +,-     radio

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"throw it in the gutter and go buy another"