GMOS-09
Chime Volume Adjustment
Note: If Y91 is present on the RPO list, refer to
your owner’s manual to adjust chimes.
1) Withcaron,shutoffcarandleavekeys
inignition.Openthecardoorandleaveit
open.Chimeswillbeheard.
2) Wait10seconds,thenwithasmall
screwdriveradjustthepotentiometer
fullycounterclockwise(allthewayleft),
thenclockwisetoraisechimeleveland
counterclockwisetolowerthechimelevel.
3) Whenthevolumeisatthedesiredlevel,
removethekeysfromtheignition.Thiswill
lockthechimevolumeatitscurrentlevel.
Audio Level Adjustment
1) Startyourvehicleandturnontheradiohavingaudioplaying.
2) Turnyouraftermarketradio’svolumeup¾oftheway.
3) Withasmallscrewdriveradjustthepotentiometerclockwisetoraisetheaudioleveland
counterclockwisetolowertheaudiolevel.
4) Onceatdesiredlevelyouraudioadjustmentiscomplete.
OnStar Level Adjustment
ToadjusttheOnStarvolumelevelfindtheBlack/Yellowwireonthe16-pinharness.Push
theblueOnStarbutton,whilethevoiceisspeakingtaptheBlack/Yellowwiretoground.
Thereare4volumesettingsforOnStar;oncethe4thsettingisreachedandtheBlack/
Yellowwireistappedtogrounditwillautomaticallygobacktothefirstvolumesetting.
OncethevolumeissetitwillstayatthatvolumeuntiltheBlack/Yellowwireistappedto
ground
again.Thiscanbesetduringinstallationandthenleftalone.Ifuseradjustmentis
desired,thecustomermayalsotapvolumeupordownonthesteeringwheel(ifequipped)
toadjusttheOnStarlevel.
Potentiometer located on the 16 pin side
of the interface
AXXESS ACCESSORIES
STEREOS