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2020 Chevrolet Express 2500, Remote Start Alarm Wiring

Printed From: the12volt.com
Forum Name: Vehicle Wiring Information & File Requests
Forum Discription: Request Car Alarm, Car Stereo, Cruise Control, Remote Starter, Navigation, Mobile Video, and Other Vehicle Specific Wiring Info, Manuals, Tech Tips
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=146525
Printed Date: November 28, 2021 at 8:21 PM


Topic: 2020 Chevrolet Express 2500, Remote Start Alarm Wiring

Posted By: musicman78
Subject: 2020 Chevrolet Express 2500, Remote Start Alarm Wiring
Date Posted: October 29, 2020 at 7:03 PM

I am having a hard time finding any info on hard wiring or t harness for this. Any help with diagram or info helps. thanks

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Nick



Replies:

Posted By: tonanzith
Date Posted: October 30, 2020 at 11:23 AM
2020 Chevrolet Express Van - North America
Item     Wire Color     Polarity     Wire Location
12 Volts     Red/White (10A)     +     BCM under passenger dash, black 25 pin plug, pin 1
Second 12 Volts     Red/Black (125A)     +     Body Fuse Box under driver seat
Ground     (chassis ground)          
Starter Kill     Violet     +     Underhood Fuse Box, gray 56 pin plug, pin E1
Second Starter     Pink (R Code) (see Tech Doc 1605)     + 9600 Ohms     Ignition Switch, black 6 pin plug, pin 5
Ignition     Pink     +     Ignition Switch, black 6 pin plug, pin 2
Accessory     Brown     +     Ignition Switch, black 6 pin plug, pin 3
Second Accessory     (same as second starter)     + 6300 Ohms     
R Code     Pink     MUX     Ignition Switch, black 6 pin plug, pin 5
Keysense     (same as second starter)          
CAN Bus High     Blue     Data     OBD-Data Link Connector, black 16 pin plug, pin 6
CAN Bus Low     White     Data     OBD-Data Link Connector, black 16 pin plug, pin 14
CAN Bus SW     Dk. Green     Data     OBD-Data Link Connector, black 16 pin plug, pin 1
OBD 12 Volts     Red/White (20A)     +     OBD-Data Link Connector, black 16 pin plug, pin 16
OBD Ground     Black/White     -     OBD-Data Link Connector, black 16 pin plug, pin 4
OBD Connector     Black          Under Driver Dash, Behind Parking Brake Release
IMMO Data     Dk. Green     Data     Immobilizer Control Module on ignition switch, black 5 pin plug, pin 4
IMMO Power     Red/White     +     Immobilizer Control Module on ignition switch, black 5 pin plug, pin 1
Power Lock     Pink/Black     -     Driver Kick, door harness --or-- BCM under passenger dash, gray 28 pin plug, pin 12
Power Unlock     Orange/Black     -     Driver Kick, door harness --or-- BCM under passenger dash, gray 28 pin plug, pin 11
Power Unlock - Driver Door     Yellow     -     BCM under passenger dash, gray 28 pin plug, pin 6
Lock Motor     Gray     Reverse     Driver Kick, black 40 pin plug, pin B8
Driver Unlock Motor     Tan     Reverse     Driver Kick, black 40 pin plug, pin B7
Passenger Unlock Motor     Tan     Reverse     Passenger Kick, door harness --or-- Body Fuse Box under driver seat, black 56 pin plug, pin J4
Parking Lights     Brown     +     Body Fuse Box under driver seat, gray 56 pin plug, pin B4
Parking Lights -     Lt. Blue     -     BCM under passenger dash, white 25 pin plug, pin 8 --or-- Headlight Switch
Hazards     White     -     BCM under passenger dash, green 27 pin plug, pin 19 --or-- Hazard Switch
Turn Signal (Left)     Lt. Blue/White (LF); Yellow (LR)     +     BCM under passenger dash, brown 25 plug, pin 4 (LF); pin 1 (LR)
Turn Signal (Right)     Dk. Blue/White (RF); Dk. Green (RR)     +     BCM under passenger dash, black 25 plug, pin 5 (RF); brown 25 plug, pin 2 (RR)
Headlight     White (also need to trigger parking lights (-))     -     BCM under passenger dash, white 25 pin plug, pin 12 --or-- Headlight Switch
AutoLights     Dk. Green     - (Off)     BCM under passenger dash, white 25 pin plug, pin 17 --or-- Headlight Switch
Reverse Light     Dk. Blue     +     BCM under passenger dash, white 25 pin plug, pin 22
Left Front Door Trigger     Gray/Black (ajar)     -     BCM under passenger dash, pink 25 pin plug, pin 10
Left Front Door Trigger 2     Tan (open)     -     BCM under passenger dash, gray 28 pin plug, pin 23
Right Front Door Trigger     Tan/White     -     BCM under passenger dash, pink 25 plug, pin 8
Left Rear Door Trigger     Dk. Blue/White     -     BCM under passenger dash, pink 25 plug, pin 15
Right Rear Door Trigger     Yellow/Black     -     BCM under passenger dash, pink 25 plug, pin 14
Dome Light     Gray/Black or Dk. Blue/White     +     BCM under passenger dash, white 25 pin plug, pin 5
Trunk/Hatch Pin     Pink/Black     -     BCM under passenger dash, pink 25 plug, pin 12
Hood Pin     Pink/Black     -     BCM under passenger dash, black 25 plug, pin 17
Trunk/Hatch Release     Yellow (unlock rear cargo door only)     +     BCM under passenger dash, gray 28 pin plug, pin 2
Power Sliding Door (Left)     Lt. Blue (F); Lt. Green (R) (left side access panel)     -     BCM under passenger dash, black 25 plug, pin 24 (F); pin 11 (R)
Power Sliding Door (Right)     Lt. Blue (right side access panel)     -     BCM under passenger dash, black 25 plug, pin 20
Tachometer     Dk. Blue/White (gas)     AC     ECM on driver fender, black 73 pin plug, pin 60
Tachometer 2     Yellow/Violet (diesel)     AC     ECM on driver fender, black 96 pin plug, pin 41
Wait to Start     Green/Brown     -     Instrument Cluster, black 20 pin plug, pin 9 --or-- ECM on driver fender, black 66 pin plug, pin 19
Fuel Pump     Gray     +     Underhood Fuse Box, black 30 pin plug, pin B1
Rear Defroster     White     + Latched     Body Fuse Box under driver seat, gray 56 pin plug, pin C4
Mirror Defroster     (same as rear defroster)          
Speed Sense     Dk. Green/White or Yellow/Black (gas)     AC     ECM on driver fender, blue 56 pin plug, pin 50
Brake Wire     Lt. Blue/White (functions with ignition on only)     +     BCM under passenger dash, brown 25 plug, pin 6
Parking Brake     Lt. Blue     -     BCM under passenger dash, brown 25 plug, pin 16 --or-- Parking Brake Switch
Horn Trigger     Tan     -     BCM under passenger dash, brown 25 plug, pin 18 --or-- Horn Switch
Wipers     Gray     +     BCM under passenger dash, brown 25 plug, pin 20
Left Front Window (Up/Down)     Dk. Blue - Brown     A     Driver Window Switch, black 8 pin plug, pins G - H
Right Front Window (Up/Down)     Lt. Blue - Tan     A     Driver Kick, black 40 pin plug, pins D5 - D4
Radio 12V     Red/White     +     Radio, black 14 pin plug, pin 1
Radio Ground     Black/White     -     Radio, black 14 pin plug, pin 8
Radio Ignition     Dk. Green (delayed accessory) (with power window)     +     Driver Kick, black 40 pin plug, pin D6
Radio Illumination     Yellow (dimmer)     +     Radio, black 14 pin plug, pin 7
Left Front Speaker (+/-)     Dk. Blue - Lt. Blue     +,-     Radio, black 14 pin plug, pins 2 - 9
Right Front Speaker (+/-)     Orange - Dk. Green     +,-     Radio, black 14 pin plug, pins 3 - 10
Left Rear Speaker (+/-)     Tan - White     +,-     Radio, violet 16 pin plug, pins 5 - 13
Right Rear Speaker (+/-)     Tan - Orange     +,-     Radio, violet 16 pin plug, pins 6 - 14
Satellite Radio 12 Volts     Red/White     +     Digital Radio under driver dash, 16 pin plug, pin 16
Satellite Radio Ground     Black/White     -     Digital Radio under driver dash, 16 pin plug, pin 9
Satellite Radio Ignition     (Low Speed GMLAN)          
Satellite Radio Antenna     (coaxial cable)          
Satellite Audio Left (+/-)     Brown/White - Tan/White     +,-     Digital Radio under driver dash, 16 pin plug, pins 2 - 1
Satellite Audio Right (+/-)     Dk. Green/White - Gray     +,-     Digital Radio under driver dash, 16 pin plug, pins 3 - 4
What Fits?
Item     Size     Depth     Location
Headunit     Double DIN          Center of Dash
Left Front Speaker     6.5          Left Front Door
Right Front Speaker     6.5          Right Front Door
Left Rear Speaker     5          Left Rear Cargo Door
Right Rear Speaker     5          Right Rear Cargo Door

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Gary Sather




Posted By: musicman78
Date Posted: October 30, 2020 at 4:53 PM
Great, thank you. What is needed for ignition bypass?

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Nick





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