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2018 Chevrolet Express 2500 Security Wiring NeededPrinted From: the12volt.comForum Name: Car Security and Convenience Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc. URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=145224 Printed Date: May 09, 2025 at 9:20 PM Topic: 2018 Chevrolet Express 2500 Security Wiring Needed Posted By: gpomp Subject: 2018 Chevrolet Express 2500 Security Wiring Needed Date Posted: February 07, 2019 at 7:55 PM Hello everyone. Can someone provide me a wiring diagram for my 2018 Chevy Express 2500 6 cylinder Cargo van? I need to put my security system in.
Thank you. ------------- George Replies: Posted By: i am an idiot Date Posted: February 08, 2019 at 9:07 AM 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 violet (for starter kill only) + starter or underhood fuse box, lt. 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 Keysense same as second starter CAN Bus High tan/black data OBD-data link connector, black 16 pin plug, pin 6 CAN Bus Low tan 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 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 or BCM under pass dash, gray plug, pin 12 Power Unlock orange/black - driver kick or BCM under pass dash, gray plug, pin 11 Power Unlock - Driver Door yellow - BCM under pass dash, gray plug, pin 6 Lock Motor gray 5 wire driver kick, black 40 pin plug, pin B8 Driver Unlock Motor tan 5 wire driver kick, black 40 pin plug, pin B7 Passenger Unlock Motor tan 5 wire pass kick or body fuse box under driver seat, blk 56 pin plug, pin J4 Parking Lights brown + body fuse box under driver seat, lt. 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 - hazard switch or BCM under pass dash, green plug, pin 19 Turn Signal (Left) lt. blue/white (F); yellow (R) + BCM under passenger dash, brown plug, pins 4 and 1 Turn Signal (Right) dk. blue/white (F); dk. green (R) + BCM under passenger dash, black plug, pin 5; brown plug, pin 2 Headlight white (also need to trigger parking lights (-)) - headlight switch or BCM under pass dash, white plug, pin 12 AutoLights dk. green - (off) headlight switch or BCM, white plug, pin 17 Reverse Light dk. blue + BCM under passenger dash, white plug, pin 22 Left Front Door Trigger gray/black (ajar); tan (open) - BCM under passenger dash, pink 25 pin plug, pin 10; gray plug, pin 23 Right Front Door Trigger tan/white - BCM under passenger dash, pink plug, pin 8 Left Rear Door Trigger dk. blue/white - BCM under passenger dash, pink plug, pin 15 Right Rear Door Trigger yellow/black - BCM under passenger dash, pink plug, pin 14 Dome Light gray/black or dk. blue/white + BCM under passenger dash, white plug, pin 5 Trunk/Hatch Pin pink/black - BCM under passenger dash, pink plug, pin 12 Hood Pin pink/black - BCM under passenger dash, black plug, pin 17 Trunk/Hatch Release yellow (unlock rear cargo door only) + BCM under passenger dash, gray plug, pin 2 Power Sliding Door (Left) lt. blue (F); lt. green (R) (left side access panel) - BCM under passenger dash, black plug, pins 24, 11 Power Sliding Door (Right) lt. blue (right side access panel) - BCM under passenger dash, black 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, lt. 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 plug, pin 6 Parking Brake lt. blue - parking brake switch or BCM under pass dash, brown plug, pin 16 Horn Trigger tan - horn switch or BCM under pass dash, brown plug, pin 18 Wipers gray + BCM under passenger dash, brown plug, pin 20 Left Front Window (Up/Down) dk. blue - brown A driver window switch, black 8 pin plug, pins G and H Right Front Window (Up/Down) lt. blue - tan A driver kick, black 40 pin plug, pins D5 and D4 |
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