Quick Start Guide

REV. 4/1/2019 INST99-3028S

INTERFACE FEATURES

INTERFACE COMPONENTS

• Axxess interface

• 3028 harness

• Climate control harness

• 16-pin harness with stripped leads

• 4-pin to 4-pin resistor pad harness

• Female 3.5mm connector with stripped leads

TOOLS REQUIRED

• Crimping tool and connectors, or solder gun, solder, and heat shrink

• Small ﬂat blade screwdriver • Tape • Wire cutter • Zip ties

TABLE OF CONTENTS

Connections .............................................................................................................................10-13

For models

without

an ampliﬁer ......................................................................................10-11

For models

with

an ampliﬁer ............................................................................................12-13

Installation ...................................................................................................................................13

Programming ...............................................................................................................................14

Adjustments .................................................................................................................................14

Steering Wheel Control Settings ...........................................................................................16-18

Troubleshooting ...........................................................................................................................19

• Provides accessory power (12-volt 10-amp)

• Maintains the Retained Accessory Power (R.A.P.) feature

• Provides NAV outputs (parking brake, reverse, speed sense)

• Retains warning chimes

• Retains OnStar/OE Bluetooth

• Adjustable volume for chimes and OnStar

• Retains the factory AUX-IN jack

• Retains audio controls on the steering wheel

• Can be used in non-ampliﬁed, or ampliﬁed models

• Retains balance and fade

• Micro-B USB updatable

Attention! This interface will work with models that are either non-ampliﬁed or ampliﬁed,

Please follow the instructions carefully for your model vehicle. Failure to do so will result in

either no sound, or low sound. If you are unsure if your vehicle is factory ampliﬁed or not,

please contact your local dealership.

AXXESS INTERFACE INSTALLATION