class action lawsuit OnStar module backorder

My suburban and Yukon are same. GMC customer support enthusiastically called me, and the dealership enthusiastically helped me file a claim with GMC. However, GMC denied my claim to replace telecom module . I recently reviewed numerous Chevrolet and GMC Carfax records and found that most vehicles had their communication modules replaced free of charge through a friend program. This is a clear product defect, yet GMC not only failed to disclose this information, but is charging some owners for it. If GMC charges any owner whose communication module is damaged, I recommend that they obtain a lawyer to represent them and sue GMC for compensation.