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TrailBlazer 2002-2009
The TrailBlazer, originally introduced as an upscale Blazer, was produced from 2002 to 2008 with a powerful I6 engine and with a monster V8 offered in the Trailblazer SS
Platform: GMT 305, 360, & 370.

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Old 07-24-2008, 02:07 PM
Join Date: Jul 2008
Posts: 2
Default 02 Trailblazer - Service OnStar message

I keep getting a SERVICE ONSTAR message on my dashboard and the light on the rear view mirror turns from green to red for the onstar function. This continues off and on the entire time the truck is running. Any idea on how to fix this issue?

Thanks ahead of time.
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Old 07-24-2008, 03:40 PM
CF Senior Member
Join Date: Feb 2007
Posts: 339
Default RE: 02 Trailblazer - Service OnStar message

02 are analog.
transition to digital is going on.
maybe thats why its doing that.
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Old 07-25-2008, 03:04 PM
shawnvw's Avatar
Super Moderator
Professional Mechanic
Join Date: Jan 2008
Posts: 2,571
Default RE: 02 Trailblazer - Service OnStar message

If you haven't already purchased the digital upgrade for your vehicle, you have 2 options. Buy the digital upgrade. GM was paying for the parts, you just had to buy 1yr subscription. I am unsure if GM is still paying for parts. The other option is to have your dealership disable the OnStar system (which GM is currently paying for). If you don't want to bring it to the dealership, and have an analog system, just pull all the conectors from the VCIM which is under the RR seat and that will disable the system

If you have a question, ask it in the forums. I will no longer be answering questions sent to my email.
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Old 07-25-2008, 03:04 PM

02, analog, blazer, chevrolet, chevy, deactivate, disable, located, message, onstar, service, trail, trailblazer, turn, vcim

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