Exterior Lamp Controls
The exterior lamp control is on the
instrument panel to the left of the
steering column.
There are four positions.
: Turns the exterior lamps off and
deactivates the AUTO mo
Instrument Panel Illumination
Control
The brightness of the instrument
cluster display, infotainment display
and controls, steering wheel
controls, and all other illuminated
controls, as well as feat
Entry Lighting
Some exterior lamps and most of
the interior lamps turn on briefly at
night or in areas with limited lighting
when the Remote Keyless Entry
(RKE) transmitter button is
pressed.
After
SCHEMATIC AND WIRING DIAGRAMS
SHIFT LOCK CONTROL WIRING SCHEMATICS
Shift Lock Control
DIAGNOSTIC INFORMATION AND PROCEDURES
DTC B270A
Diagnostic Instructions
Perform the Diagnostic System Check prior to using this diagnostic
procedure: Diagnostic System
Check - Vehicle
Review the description
OnStar Description and Operation (UE1 with IOB/IO6)
This OnStar system consists of the following components:
Telematics communication interface control module
OnStar three button assembly
Microphone
Cellular antenna
Navigation antenna
Bluetooth antenna (If equipped)
Back up battery (If