Which wires give constant, ignition and ground on a 2025 Chevrolet Silverado 1500 / GMC Sierra 1500?
On a 2025 Chevrolet Silverado 1500 / GMC Sierra 1500, take constant power from the Red/White wire at the body control module above the driver kick panel, and ground to the Black wire at the body control module above the driver kick panel. Meter every wire first.
Meter every wire before you tap it. Colors change with trim and build date.
OBD-II port:Location not confirmedBest power spot:Body control module above the driver kick panelSystem voltage:12VIgnition type:Push-button (this page)
Where do I get constant, ignition and ground on a 2025 Chevrolet Silverado 1500 / GMC Sierra 1500?
Constant and ground are at the body control module above the driver kick panel. No ignition wire color is printed for these push-to-start trucks.
Option 1 Constant and ground
Body control module
Above the driver kick panel. Plugs X2 (pink), X3 (blue, Sierra guide), X4 (gray), X5 (green) and X8 (dark gray).
Constant
Red/White
Body control module above the driver kick panelAlways hot, 12V. Fortin powers its module from this wire.
Ground
Black
Body control module above the driver kick panelGround at the same module.
Ignition
Not found
Not foundFortin reads ignition over the data bus on these trucks, so no ignition wire color is printed. Use a fuse tap for switched power.
Colors from Fortin. The guide does not say which plug or pin each wire is in, so find the color and meter it.
Option 2 Ignition
Fuse tap
For switched power.
Ignition
Fuse tap
Interior fuse panelNo fuse position was found in a source for these years. Meter the slots with the truck off, then on, and use an add-a-fuse tap.
Ground
Body ground
Body metal under the dashClean, bare metal only. Never the battery negative post.
Pick a slot that is dead with the truck off and hot with it on.
From Fortin's install guides for the 2022 to 2026 Silverado 1500 (gas and diesel) and Sierra 1500 with push-to-start. The Silverado gas guide (2022 to 2026), the Silverado diesel guide (2022 to 2024) and the Sierra guide (2022 to 2026) print the same colors, except the power tailgate wire.
Where are the turn signal, reverse and light wires on a 2025 Chevrolet Silverado 1500 / GMC Sierra 1500 for advanced 360 multicam and video telematics installs?
Circuit
Wire color
Location and what it does
Left turnNot foundNot yet checked
Not found
Not foundWe found no source for this wire.
Right turnNot foundNot yet checked
Not found
Not foundWe found no source for this wire.
Park lightNegative -Not yet checked
Green/Gray
Body control module above the driver kick panelFortin uses this as a negative (ground) trigger to flash the parking lights. It is a control wire, so meter it before you use it as a sense input.
HeadlightNot foundNot yet checked
Not found
Not foundWe found no source for this wire.
ReverseNot foundNot yet checked
Not found
Not foundWe found no source for this wire.
Dome lightNot foundNot yet checked
Not found
Not foundWe found no source for this wire.
Each chip shows the main insulation color with its stripe. Source: Fortin's install guides for the 2022 to 2026 Silverado 1500 (gas and diesel) and Sierra 1500 with push-to-start.
Where are the brake, door, speed and CAN wires on a 2025 Chevrolet Silverado 1500 / GMC Sierra 1500 for advanced 360 multicam and video telematics installs?
Circuit
Wire color
Location and what it does
BrakeDataNot yet checked
Blue/Yellow
Body control module above the driver kick panelFortin marks this as a multiplexed (MUX) brake signal, not a plain 12V brake wire. Do not use it as a 12V sense input.
DoorsNot foundNot yet checked
Not found
Not foundWe found no source for this wire.
Door lockDataNot yet checked
Green/Yellow
Body control module above the driver kick panelFortin marks this as a data wire for the door locks.
HornNegative -Not yet checked
Green/White
Body control module above the driver kick panelNegative horn trigger.
Power tailgateNegative -Not yet checked
Yellow (Silverado)
Brown (Sierra)
Body control module above the driver kick panelNegative trigger for the power tailgate, on trucks that have one. Fortin prints Yellow for the Silverado and Brown for the Sierra.
Push-button startDataNot yet checked
Blue/Green
Body control module above the driver kick panelMultiplexed start button signal. Never tap it.
Parking brakeNot foundNot yet checked
Not found
Not foundWe found no source for this wire.
Vehicle speedNot foundNot yet checked
Not found
Not foundWe found no source for this wire.
CAN dataDataNot yet checked
Blue/Yellow (high)
White (low)
Body control module above the driver kick panelCAN bus 1. Blue/Yellow is also the brake wire color here, so go by plug and pin, not color alone. Never cut or splice the CAN wires.
Source: Fortin's install guides for the 2022 to 2026 Silverado 1500 (gas and diesel) and Sierra 1500 with push-to-start. Ignition, turn, reverse, headlight, dome, door pin, parking brake and speed wires were not found.
Where are the fuse boxes and ground points on a 2025 Chevrolet Silverado 1500 / GMC Sierra 1500?
InteriorFuse panelNo fuse position for these years was found in a source. Read the lid label and meter the slot.
Body moduleAbove the driver kick panelPlugs X2 (pink), X3 (blue), X4 (gray), X5 (green) and X8 (dark gray), per Fortin.
Ground pointsBlack wire at the body moduleOr clean body metal. Never the battery negative post.
Locations from Fortin's install guides.
Where is the OBD-II port on a 2025 Chevrolet Silverado 1500 / GMC Sierra 1500?
OBD II
Diagnostic portOBD-II port: location not confirmedLook under the driver side dash first, and send us a photo if you find it.
Which years share wiring with the 2025 Chevrolet Silverado 1500 / GMC Sierra 1500?
This page2025Silverado 1500 and Sierra 1500 with push-button start, new body.
Same wiring2022, 2023, 2024, 2026Fortin covers the 2022 to 2026 push-to-start Silverado and Sierra with one guide each, and its 2022 to 2024 Silverado diesel guide prints the same wires.
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This page covers the 2025 Chevrolet Silverado 1500 and GMC Sierra 1500 with push-button start. It does not cover the 2022 Silverado 1500 LTD, which is the older body.
The wire colors come from Fortin's install guides, read wire by wire. Fortin works these trucks mostly over the data bus, so only a few plain wires are printed. Our own team has not yet metered these on a 2025 truck.
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.
Common questions about 2025 Chevrolet Silverado 1500 / GMC Sierra 1500 wiring
What wire is constant power on a 2025 Chevrolet Silverado 1500 / GMC Sierra 1500?
Red/White at the body control module above the driver kick panel. Always hot, 12V. Meter it before you tap it.
Where is the brake wire on a 2025 Chevrolet Silverado 1500 / GMC Sierra 1500?
Blue/Yellow at the body control module above the driver kick panel. Fortin marks this as a multiplexed (MUX) brake signal, not a plain 12V brake wire. Meter it before you tap it.
Which years share wiring with the 2025 Chevrolet Silverado 1500 / GMC Sierra 1500?
2022, 2023, 2024, 2026. Fortin covers the 2022 to 2026 push-to-start Silverado and Sierra with one guide each, and its 2022 to 2024 Silverado diesel guide prints the same wires.
Help build this page
Had the panels off on one of these? Show the next installer what you found.
No one has sent photos for the 2025 Chevrolet Silverado 1500 / GMC Sierra 1500 yet, so yours could be the first. Every photo, wire color and tip we use goes on this page with your name on it, and it saves the next installer time under the dash.
1. Snap it
The plugs, tap points, fuse boxes and ground points. Phone photos are fine.
2. Send it
Tap "Add yours" at the top of this page. Your tip and your photos go in the same box.
3. See your name on it
We check every tip, then post it here "Compliments of" you, by name.
Compliments of
The installers who helped build this page.
★
Founding contributor spot: openThe first installer to confirm a wire or send photos for the 2025 Chevrolet Silverado 1500 / GMC Sierra 1500 gets their name here, and it stays here.
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Every tip we use gets a creditThe wire you checked is marked "Checked on a truck, compliments of" you.
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