GMOS-13
3
Connections to be made
From the 18-pin Axxess harness to 16-pin GM harness:
t $POOFDUUIF
Yellow
XJSFUPUIFSBEJPTWPMUCBUUFSZPSNFNPSZXJSF
t $POOFDUUIF
Black
XJSFUPUIFSBEJPTHSPVOEXJSF
t 1MVHUIFQJO"YYFTTIBSOFTTJOUPUIF(.04
t 5IF
Black/Yellow
XJSFJTGPSUIF0O4UBSWPMVNFBEKVTUNFOU5IJTXJMMCF
EJTDVTTFEJOUIF0O4UBS-FWFM"EKVTUNFOUTFDUJPOPGUIJTJOTUSVDUJPO
From the 16-pin GM harness:
t $POOFDUUIF
Blue
XJSFUPUIFBGUFSNBSLFUSBEJPTBOUFOOBUVSOPOXJSF
5IFQJOIBSOFTT "48$QMVHXJMMCFEJTDVTTFEMBUFSJOUIFNBOVBM
t 8JUIBMMDPOOFDUJPOTDPNQMFUFEUPUIFBGUFSNBSLFUSBEJPQMVHUIF QJO
IBSOFTTFTJOUPUIFWFIJDMFXJSJOHIBSOFTTFT
t 3FDPOOFDUUIFOFHBUJWFCBUUFSZUFSNJOBM
t $ZDMFUIFLFZCZUVSOJOHUIFJHOJUJPOPOGPSTFDPOET5IFOPGGBOEPOBHBJO
UPUFTUUIFSBEJP
Installing the GMOS-13
t 5VSOUIFJHOJUJPOiPOw5IFOUVSOUIFBGUFSNBSLFUSBEJPiPOw
t 1SFTTUIF0O4UBSCVUUPOUIFSBEJPTIPVMEUVSOiPGGw SBEJPXJMMNVUFJGNVUFXJSF
JTDPOOFDUFEBOEZPVTIPVMEIFBS0O4UBS
t 1VTIUIF0O4UBSDBODFMCVUUPOBOEUIFSBEJPTIPVMEDPNFCBDLiPOw
Testing the GMOS-13
t 5PBEKVTUUIF0O4UBSWPMVNFMFWFMGJOEUIF#MBDL:FMMPXXJSFPOUIF
QJO"YYFTTIBSOFTT
t 1VTIUIFCMVF0O4UBSCVUUPOXIJMFUIFWPJDFJTTQFBLJOHUBQUIF#MBDL:FMMPX
XJSFUPHSPVOE
t 0ODFUIFWPMVNFJTTFUJUXJMMTUBZBUUIBUWPMVNFVOUJMUIF#MBDL:FMMPXXJSFJT
UBQQFEUPUIFHSPVOEBHBJO
This can be set during installation and then left alone. If adjustment is
desired, the user may also tap “Volume Up” or “Down” on the steering wheel
(if equipped) to adjust the OnStar level.
OnStar Level Adjustment
