jer Posted January 28, 2004 Report Share Posted January 28, 2004 I am buying a 98 DeVille from a family estate. Can OnStar be added aftermarket and what is the cost? Link to comment Share on other sites More sharing options...
Bruce Nunnally Posted January 28, 2004 Report Share Posted January 28, 2004 This is one of those things where yes, if you did the research and got the right parts you could get it to work, but it will be a project to do. Bruce 2023 Cadillac CT4-V Blackwing Follow me on: Twitter Instagram Youtube Link to comment Share on other sites More sharing options...
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