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2.1b Harness GM3HXM: (With XM)
1.Locate factory XM tuner. It is often located behind the glove box. Remove
any panels if necessary to access XM tuner's 16-pin harness. Unplug the
16-pin harness.
2. Plug the male end of the GM3HXM harness into the 16-pin port on the
XM tuner. Next connect the factory male 16-pin into the 16-pin female con-
nector on the GM3HXM harness.
3. Optional Connections:
RED: Retains Accessory Power (RAP). Provides 12V(+) accessory power
after the vehicle is turned off up to 10 minutes, or until the drivers door
is open.
RED/WHITE: Non functional wire; no connection is necessary.
Note: Insulate all wires that are on the iPAC-GM3 harness that are not
used for installation
4. Connect the 8-pin connector on the iPod docking cable to the iPAC-
GM3 interface. (DO NOT CONNECT iPOD AT THIS TIME, WAIT UNTIL
INITIALIZATION IS COMPLETE, SEE SECTION 2.2 FOR DETAILS)
5. Plug the male 24-pin connector of the GM3H harness into the
iPAC-GM3 interface.
iPod PLUG
& CABLE
7
Factory 16 Pin Harness
iPod
iPAC-GM3
RCA
CABLE
Red Wire From T-harness Optional
ACC +12V OUTPUT works with RAP
( Retained Accessory Power)
Male Plug
16 Pin Female Plug
GM3HXM Harness
OPTIONAL
AUDIO
SOURCE
16 Pin Male Plug
XM TUNER
32 Pin Power
Audio Harness
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