









GM link to information [gm.com] Trial Activation Steps Your XM trial may have been activated when you purchased your vehicle. If you're not receiving all 170 channels, please follow these steps: 1. Get your Radio ID, which can be found on Channel 0 on the XM Band. 2. Call 1-877-209-5079. 3. Request the XM 3-Month Trial for GM Used Vehicles. Hopefully... - Read More at SlickDeals