Which wires give constant, ignition and ground on a 2021 Buick Envision?
On a 2021 Buick Envision, take constant power from the Red/Purple wire at the gray X4 plug on the body control module, center console passenger side, pin 22, ignition from the interior fuse panel (wire color not published), and ground to the Black wire at the gray X4 plug on the body control module, pin 25. Meter every wire first.
Meter every wire before you tap it. Colors change with trim and build date.
OBD-II port:Under the dash, driver sideBest power spot:Body control moduleSystem voltage:12VIgnition type:Push-button start (this page)
Where do I get constant, ignition and ground on a 2021 Buick Envision?
Constant and ground are on one body control module plug. The guide gives no ignition wire.
Option 1 All the power
Body control module
Gray X4 plug on the body control module beside the center console.
Constant
Red/Purple
Gray X4 plug on the body control module, center console passenger side, pin 2212V battery feed.
Ground
Black
Gray X4 plug on the body control module, pin 25Factory ground.
No ignition or accessory wire in the guide. Use a fuse tap for ignition.
Option 2 Backup
Fuse tap
If you would rather not open the column.
Ignition
Fuse tap
Interior fuse panelBackup: a slot that is dead off and hot on.
Use an add-a-fuse.
From Fortin's install guide for the 2021 to 2022 Envision with push-button start (guide 110551).
Where are the turn signal, reverse and light wires on a 2021 Buick Envision 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
Pink X2 plug on the body control moduleGround when the parking lights are on. Meter it first.
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 guide for the 2021 to 2022 Envision with push-button start (guide 110551).
Where are the brake, door, speed and CAN wires on a 2021 Buick Envision for advanced 360 multicam and video telematics installs?
Circuit
Wire color
Location and what it does
CAN dataDataNot yet checked
Blue/White (CAN high)
Blue/Yellow (CAN low)
Black 29-pin X1 plug on the telematics module, above the driver kick panelNever cut or splice the CAN wires.
BrakeDataNot yet checked
Blue/Yellow (data)
Green X5 plug on the body control moduleMultiplex signal, not a plain on and off wire.
DoorsNot foundNot yet checked
Not found
Not foundWe found no source for this wire.
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.
Source: Fortin's install guide for the 2021 to 2022 Envision with push-button start (guide 110551). Wires marked Not found were not in the guide.
Where are the fuse boxes and ground points on a 2021 Buick Envision?
Steering columnBody control moduleConstant, ignition, accessory.
Driver kick panelTelematics moduleCAN.
Ground pointsBare body metalNever the battery negative post.
Locations from Fortin's install guide.
Where is the OBD-II port on a 2021 Buick Envision?
OBD II
Diagnostic portOBD-II port: under the dash, driver sidePlug-in GPS trackers and OBD harnesses connect here. Check the port before you plan the install.
Which years share wiring with the 2021 Buick Envision?
This page2021Buick Envision.
Same wiring2022Fortin uses the same guide for these years.
Older years2017 to 2020Different wiring and guide.
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This page covers the 2021 Buick Envision compact SUV with push-button start.
The wire colors come from Fortin's install guide, read wire by wire. Our own team has not yet metered these on a 2021 Envision.
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 vehicle in front of you.
Common questions about 2021 Buick Envision wiring
What wire is constant power on a 2021 Buick Envision?
Red/Purple at the gray X4 plug on the body control module, center console passenger side, pin 22. 12V battery feed. Meter it before you tap it.
Where is the brake wire on a 2021 Buick Envision?
Blue/Yellow (data) at the green X5 plug on the body control module. Multiplex signal, not a plain on and off wire. Meter it before you tap it.
Which years share wiring with the 2021 Buick Envision?
2022. Fortin uses the same guide for these years.
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 2021 Buick Envision 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.
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Founding contributor spot: openThe first installer to confirm a wire or send photos for the 2021 Buick Envision 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 vehicle, compliments of" you.
Want to be famous?
Your name, right on this page, for everyone who uses it to see. Add your tip and your photos in one box.
