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Blue Surface

2018 GMC SIERRA 3500

STARTING METHOD:

Key

ENGINE TYPE:

Gas/Diesel

+12V:

Red/Purple

BCM under driver dash, blue 27 pin plug, pin 4

IGNITION:

Purple/Black

Ignition Switch, black 6 pin plug, pin 2

STARTER:

Yellow or Yellow/Purple

At harness coming from fuse box under hood

HORN:

Brown/White(-)

BCM under driver dash, brown 26 pin plug, pin 19

PARKING LIGHTS:

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DASH REMOVAL:

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COMMENTS:

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PHOTOS:

Click on each photo to make them larger

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