You probably need to program the garage door opener not the car i have only had to program the craftsman opener in my garage once our 2005 grand caravan has a built in opener the opener should have a programming button my craftsman opener s button is under one of the light covers it will probably have the programming instructions near the button in tiny print you will want to have all of.
Trailblazer program garage door opener.
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Be sure that people and objects are clear of the garage.
This includes any garage door opener model manufactured before april 1 1982.
The battery in the garage door remote may be too weak to program homelink.
Garage door opener programming universal garage door opener programming important.
When programming more than 1 garage door opener unit disconnect power from unit before programming more units.
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Do not use the garage door opener gdo with any garage door opener that does not have the stop and reverse safety feature.