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Wiring Database / Chevrolet / Impala / 2008

2008 Chevrolet Impala

Full-size sedan. Key start.

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Which wires give constant, ignition and ground on a 2008 Chevrolet Impala?

On a 2008 Chevrolet Impala, take constant power from the Red/White wire at the ignition switch harness, ignition from the Pink wire at the ignition switch harness, 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 2008 Chevrolet Impala.

This car has a standard key. We found only partial data for 2008: its ignition switch colors match the 2006 and 2007 sheets, and the rest is carried from them. Our own team has not yet metered these on this car.

OBD-II portLocation not confirmed
Best power spotIgnition switch harness
System voltage12V
Ignition typeKey

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Where do I get constant, ignition and ground on a 2008 Chevrolet Impala?

Take constant, ignition and ground from the same area.

Option 1 Easiest

Ignition switch harness

Steering column. Key start on every year of this body.

Constant
Red/White
Ignition switch harnessAlways hot.
Ignition
Pink
Ignition switch harnessHot in run.
Ground
Body ground
Body metal under the dashClean, bare metal only. Never the battery negative post. No source named a factory ground point under the dash.
Accessory
Brown
Ignition switch harnessHot in accessory and run.
There is no starter wire at the ignition switch on this car; the starter wire is Yellow at the engine computer. Never tap it.
Option 2 More wires

BCM under the driver dash

Left of the steering column.

Constant
Red/White
BCM left of the steering column, blue plug, pin 3Always hot, 10A.
Ignition
Pink
BCM, green plug, pin 14Hot in run.
Ground
Body ground
Body metal under the dashClean, bare metal only. Never the battery negative post. No source named a factory ground point under the dash.
Accessory
Brown
BCM, green plug, pin 21Hot in accessory and run.
BCM plug and pin numbers from the 2006 and 2007 sheets. The 2008 sources confirm the colors at the ignition switch only.

Colors from 2006 and 2007 Impala wire sheets on the12volt. A 2008 owner post gives the same ignition switch colors.

What are the turn signal, reverse and light wires on a 2008 Chevrolet Impala?

Circuit
Wire color
Location and what it does
Left turnPositive +Not yet checked
Light Blue/White (front)
Yellow (rear)
BCM left of the steering column, brown plug, pins 4 and 1Flashes with the left signal. From the 2006 sheet only; the 2007 sheet does not list turn signals.
Right turnPositive +Not yet checked
Dark Blue/White (front)
Dark Green (rear)
BCM: black plug, pin 5 (front); brown plug, pin 2 (rear)Flashes with the right signal. From the 2006 sheet only; the 2007 sheet does not list turn signals.
Park lightPositive +Not yet checked
Purple (left)
Brown/White (right)
Passenger kick panel, harness running to the rearPark lamp feeds. The switch side is Brown/White (negative) at the BCM white plug, pin 8. Carried from the 2006 and 2007 sheets.
HeadlightNot foundNot yet checked
Not found
Not foundWe found no source for this wire.
ReversePositive +Not yet checked
Light Green
BCM, pink plug, pin 2, or the passenger kick panelHot in reverse. Carried from the 2006 and 2007 sheets.
Dome lightPositive +Not yet checked
Gray/Black
Driver kick panel, or BCM pink plug, pin 1Dome light supervision. Carried from the 2006 and 2007 sheets.

Each chip shows the main insulation color with its stripe. Source: 2006 and 2007 Impala wire sheets on the12volt.

Where are the brake, door, speed and CAN wires on a 2008 Chevrolet Impala?

Circuit
Wire color
Location and what it does
BrakePositive +Not yet checked
Light Blue
BCM left of the steering column, brown plug, pin 5, or the brake switchHot with the pedal pressed. Carried from the 2006 and 2007 sheets.
DoorsNegative -Not yet checked
Gray/Black (left front)
Tan/White (right front)
Light Blue/Black (left rear)
Light Green/Black (right rear)
BCM, pink plug, pins 10 and 8; pins 15 and 14 for the rear doorsEach grounds when its door is open. Carried from the 2006 and 2007 sheets.
Parking brakeNegative -Not yet checked
Orange/Black
Parking brake switch, or BCM pink plug, pin 22Grounds with the parking brake set. Carried from the 2006 and 2007 sheets.
HazardNegative -Not yet checked
Tan
BCM, green plug, pin 19Hazard switch input. Carried from the 2006 and 2007 sheets.
Lock / unlockNegative -Not yet checked
Pink/Black (lock)
Orange/Black (unlock)
BCM, gray plug, pins 12 and 11A 2008 sheet gives Pink/Black for lock; the 2006 and 2007 sheets say Orange/Black on the same pin. Meter it.
TrunkNegative -Not yet checked
Orange/Black
Trunk pin switch, or BCM pink plug, pin 12Grounds with the trunk open. Carried from the 2006 and 2007 sheets.
SeatbeltNot foundNot yet checked
Not found
Not foundWe found no source for this wire.
Vehicle speedAC signalNot yet checked
Brown
Yellow (one 2008 post)
ABS module, pin 21, at the driver side rear corner of the engine bayBrown is on the 2006 and 2007 sheets. One 2008 owner found a Yellow speed wire near the transmission instead, so meter it.
TachAC signalNot yet checked
Any injector wire that is not Pink
Fuel injectors in the engine bayOn the V8, use any wire that is not Pink/Black.
CAN busNot foundNot yet checked
Not found
Not foundNo source gave the data wire colors or pins for this car.

Sources: 2006 and 2007 Impala wire sheets on the12volt (installer-reported). Headlight, seatbelt and the data bus wires were not found.

Which years share wiring with the 2008 Chevrolet Impala?

This page2008Partial 2008 data; the rest carried from 2006 and 2007.
Same wiring2006 and 2007The 2006 and 2007 sheets match line for line. 2008 has only partial data, and its ignition switch colors match.
Not this page2009 and newerSame body, but the sheets list the constant on a different BCM plug and a different lock wire.

Where are the fuse boxes and ground points on a 2008 Chevrolet Impala?

InteriorFront passenger footwell, behind a coverAuxiliary outlets fuse F7 (20A), retained accessory power F3 (10A).
Under the hoodRight side of the engine bayAuxiliary power fuse (25A) and BCM fuse (10A).
Ground pointsClean body metalNo named ground point found. Never use the battery negative post.

Fuse list from fuse guides for 2006 to 2013. Check the lid label before you use a slot.

Where is the OBD-II port on a 2008 Chevrolet Impala?

OBD
II
Diagnostic portOBD-II port: location not confirmedLook under the driver side dash first, and send us a photo if you find it.

Common questions about 2008 Chevrolet Impala wiring

What wire is constant power on a 2008 Chevrolet Impala?

Red/White at the ignition switch harness. Always hot. Meter it before you tap it.

What wire is ignition on a 2008 Chevrolet Impala?

Pink at the ignition switch harness. Hot in run. Meter it before you tap it.

Where is the reverse wire on a 2008 Chevrolet Impala?

Light Green (positive +) at the BCM, pink plug, pin 2, or the passenger kick panel. Hot in reverse. Meter it before you tap it.

Where is the brake wire on a 2008 Chevrolet Impala?

Light Blue (positive +) at the BCM left of the steering column, brown plug, pin 5, or the brake switch. Hot with the pedal pressed. Meter it before you tap it.

Where is the parking brake wire on a 2008 Chevrolet Impala?

Orange/Black (negative -) at the parking brake switch, or BCM pink plug, pin 22. Grounds with the parking brake set. Meter it before you tap it.

Where is the vehicle speed signal on a 2008 Chevrolet Impala?

Brown and Yellow (one 2008 post) at the ABS module, pin 21, at the driver side rear corner of the engine bay. Brown is on the 2006 and 2007 sheets. Meter it before you tap it.

Which years share wiring with the 2008 Chevrolet Impala?

2006 and 2007. The 2006 and 2007 sheets match line for line.

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