2019 Chevrolet Silverado 1500 LD / GMC Sierra 1500 Limited
Regular, Double and Crew Cab. Key start. Old body, sold in 2019.
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Which wires give constant, ignition and ground on a 2019 Chevrolet Silverado 1500 LD / GMC Sierra 1500 Limited?
On a 2019 Chevrolet Silverado 1500 LD / GMC Sierra 1500 Limited, take constant power from the Red/Violet wire at the BCM, under the driver dash left of the column, blue 27-pin plug, pin 4 and ignition from the Violet/Black wire at the BCM green 25-pin plug, pin 6, and ground to clean, bare body metal. Meter every wire first.
Written by API Signal, fleet GPS and camera installers for 35+ years across Georgia, South Carolina and North Carolina, installing every major telematics and camera brand. Every wire on this page lists its source.
Test every wire with a meter before you tap it
No wiring information is ever guaranteed. Colors and locations change with trim, options and build date, and the manufacturer can change them in the middle of a model year. We share this as a starting point for installers, and you are responsible for confirming every connection on the truck in front of you.
This page covers the 2019 Chevrolet Silverado 1500 and GMC Sierra 1500 LD and Limited (the old body sold alongside the new 2019 truck). The Silverado and Sierra share the same wiring. The easiest power spot is the body control module under the driver dash, left of the steering column.
GM's upfitter site says the 2019 LD and Limited carry over the 2018 electrical section, so the 2018 colors are used here. Our own team has not yet metered these on a 2019 truck, and each row says so.
OBD-II portUnder the driver dash
Best power spotBCM, left of the column
System voltage12V
Ignition typeKey
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Where do I get constant, ignition and ground on a 2019 Chevrolet Silverado 1500 LD / GMC Sierra 1500 Limited?
Take constant, ignition and ground from the same area. On this truck the body control module (BCM) under the driver dash has constant, ignition and accessory within a few inches.
Option 1 Easiest
At the BCM
Body control module, under the driver side of the dash, left of the steering column. Remove the knee panel.
Constant
Red/Violet
BCM, under the driver dash left of the column, blue 27-pin plug, pin 4Always hot, 20A. The 2015 and 2018 sheets agree on the plug and pin.
Ignition
Violet/Black
BCM green 25-pin plug, pin 6Hot in run and start. 2014, 2015 and 2018 sources agree on the color.
Ground
Body ground
Body metal under the driver dashClean, bare metal only. Never the battery negative post.
Accessory
Violet/Yellow
BCM green 25-pin plug, pin 5Hot in accessory and run
A 2015 sheet also lists a second 20A constant, Red/Blue on the BCM white 26-pin, pin 2. The 2018 sheet puts Red/Blue at the ignition switch at 2A, so meter before using it.
Option 2 Ignition switch
At the ignition switch
Steering column, black 6-pin plug. Good for ignition sense; start and key sense are resistor-coded, not plain 12V.
Constant
Not for power
Do not use the switch constantThe Red/Blue wire at the ignition switch (black 6-pin, pin 4) carries only about 2A. Take constant from the BCM (Option 1).
Ignition
Violet/Black
Ignition switch, black 6-pin plug, pin 2Hot in run and start. Same color as at the BCM.
Ground
Body ground
Body metal under the driver dashClean, bare metal only.
Accessory
Violet/Yellow
Ignition switch, black 6-pin plug, pin 3Hot in accessory and run
Start is White/Violet on pin 5, a 9600 ohm resistor-coded signal. Do not tap it for power.
Power wires from Directed install sheets for a 2015 and a 2018 Silverado (reposted on the12volt) and a 2014 to 2015 chart, which agree on the colors. Each was fetched at least twice.
What are the turn signal, reverse and light wires on a 2019 Chevrolet Silverado 1500 LD / GMC Sierra 1500 Limited?
Circuit
Wire color
Location and what it does
Left turnPositive +Not yet checked
Blue/White (front)
Yellow/Blue (rear)
BCM brown 26-pin plug, pin 2 front, pin 1 rearFlashes with the left signal.
Right turnPositive +Not yet checked
Green/Violet (front)
Brown/Green (rear)
BCM black 26-pin plug, pin 3 front, pin 4 rearFlashes with the right signal. Green/Violet is also the immobilizer data wire, and Brown/Green the hood pin, so go by plug and pin.
Park lightPositive +Not yet checked
Violet/Gray (left)
Gray/Brown (right)
Underhood fuse box, 58-pin plug, pin G1 left, pin F1 rightOn with the park lights. GM's upfitter manual uses the same colors. The switch input is Green/Gray (-) at the BCM white 26-pin, pin 22.
HeadlightNegative -Not yet checked
White/Violet
BCM white 26-pin plug, pin 16, or headlight switch black 12-pin, pin 1Headlight switch input. The 2015 sheet gives the BCM, the 2018 sheet the switch.
ReversePositive +Not yet checked
Blue/Brown
BCM brown 26-pin plug, pin 26Hot in reverse. The 2015 and 2018 sheets agree.
Dome lightPositive +Not yet checked
Gray
BCM gray 26-pin plug, pin 1Dome lamp output. Gray is also the front door wires, so go by plug and pin.
Each chip shows the main insulation color with its stripe. Source: Directed install sheets for 2015 and 2018 trucks, which match, carried to the 2019 LD.
Where are the brake, door, speed and CAN wires on a 2019 Chevrolet Silverado 1500 LD / GMC Sierra 1500 Limited?
Circuit
Wire color
Location and what it does
BrakePositive +Not yet checked
Violet/White
BCM black 26-pin plug, pin 11Hot with the pedal pressed. Three sources agree.
Driver doorNegative -Not yet checked
Gray
BCM gray 26-pin plug, pin 25, or window motor black 7-pin, pin 6Door open input.
Passenger doorNegative -Not yet checked
Gray
BCM gray 26-pin plug, pin 14, or window switch black 8-pin, pin 8Door open input.
Rear doorsNegative -Not yet checked
Gray/White
Rear window switch, black 8-pin plug, pin 2Double and Crew Cab. Same color on both rear doors.
Parking brakeNegative -Not yet checked
Blue/Violet
BCM white 26-pin plug, pin 10Grounds with the parking brake set.
HazardNegative -Not yet checked
Green/White
BCM blue 27-pin plug, pin 26Hazard switch input. Confirmed negative on a second read.
TachAC signalNot yet checked
Brown
Green
White/Green
Yellow/Gray
Fuel injector wires 1, 3, 5 or 7, rear top of the engine, black 12-pin, pins 5, 7, 8 or 9Use one injector wire as an engine speed signal.
CAN busDataNot yet checked
Blue (HS high)
White (HS low)
Light Green (GMLAN)
OBD port under the driver dash, pin 6 and pin 14; single-wire GMLAN on pin 1Same signals at the BCM white 26-pin (pins 25 and 24). Never cut or splice them.
Sources: Directed install sheets for a 2015 Silverado 1500 and a 2018 Silverado (reposted on the12volt), a 2014 to 2015 chart on the12volt, the iDatalink install guide for a 2015 Silverado, and GM's light-duty upfitter pages. Park/neutral, vehicle speed and the third brake light wire were not found.
Which years share wiring with the 2019 Chevrolet Silverado 1500 LD / GMC Sierra 1500 Limited?
This page2019 Silverado LD / Sierra LimitedGM's upfitter site lists this truck as a carry-over of the 2018 electrical section.
Same wiring2014, 2015, 2016, 2017 and 2018Directed sheets for 2015 and 2018 trucks match color for color, a 2014 to 2015 chart agrees, and GM's upfitter site says the 2019 LD carries over the 2018 electrical section. Silverado and Sierra share one GM electrical manual.
Not this page2013 and older, 2019 new body and newerThe 2007 to 2013 trucks are the GMT900. The 2019 new-body Silverado and Sierra (not the LD or Limited) are a new generation. Those have their own pages.
Where are the fuse boxes and ground points on a 2019 Chevrolet Silverado 1500 LD / GMC Sierra 1500 Limited?
InteriorTwo dash fuse panelsLeft panel at the driver end of the dash, right panel at the passenger end. On the left panel, fuse 25 is the OBD port and fuse 10 retained accessory power.
Under the hoodUnderhood fuse blockDriver side. Fuses 28 and 29 are the right and left park lamps and fuse 38 the third brake light on 2014 to 2016 trucks.
Ground pointsClean body metalWe did not find a published ground point location. Use clean, bare body metal, never the battery negative post.
Fuse numbers from a fuse-diagram site (lower trust) for 2014 to 2016 trucks. Our team has not yet checked them on a truck.
Where is the OBD-II port on a 2019 Chevrolet Silverado 1500 LD / GMC Sierra 1500 Limited?
OBD II
Diagnostic portOBD-II port: under the driver dashPlug-in GPS trackers and OBD harnesses connect here. Check the port before you plan the install.
Common questions about 2019 Chevrolet Silverado 1500 LD / GMC Sierra 1500 Limited wiring
What wire is constant power on a 2019 Chevrolet Silverado 1500 LD / GMC Sierra 1500 Limited?
Red/Violet at the BCM, under the driver dash left of the column, blue 27-pin plug, pin 4. Always hot, 20A. Meter it before you tap it.
What wire is ignition on a 2019 Chevrolet Silverado 1500 LD / GMC Sierra 1500 Limited?
Violet/Black at the BCM green 25-pin plug, pin 6. Hot in run and start. Meter it before you tap it.
Where is the reverse wire on a 2019 Chevrolet Silverado 1500 LD / GMC Sierra 1500 Limited?
Blue/Brown (positive +) at the BCM brown 26-pin plug, pin 26. Hot in reverse. Meter it before you tap it.
Where is the brake wire on a 2019 Chevrolet Silverado 1500 LD / GMC Sierra 1500 Limited?
Violet/White (positive +) at the BCM black 26-pin plug, pin 11. Hot with the pedal pressed. Meter it before you tap it.
Where is the parking brake wire on a 2019 Chevrolet Silverado 1500 LD / GMC Sierra 1500 Limited?
Blue/Violet (negative -) at the BCM white 26-pin plug, pin 10. Grounds with the parking brake set. Meter it before you tap it.
Where is the CAN bus on a 2019 Chevrolet Silverado 1500 LD / GMC Sierra 1500 Limited?
Blue (HS high) and White (HS low) and Light Green (GMLAN) at the OBD port under the driver dash, pin 6 and pin 14; single-wire GMLAN on pin 1. Same signals at the BCM white 26-pin (pins 25 and 24).
Which years share wiring with the 2019 Chevrolet Silverado 1500 LD / GMC Sierra 1500 Limited?
2014, 2015, 2016, 2017 and 2018. Directed sheets for 2015 and 2018 trucks match color for color, a 2014 to 2015 chart agrees, and GM's upfitter site says the 2019 LD carries over the 2018 electrical section.
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