After installation, akey relearn process is required to sync the BCM with your vehicle’s security system. Thistakes about 30 minutes and does not require a scan tool. Plug & Play. If this occurs, anSDM (Sensing Diagnostic Module) relearn will be needed.
Is your Envoy, Trailblazer, or Rainier acting possessed?. The BCM is the central command for your vehicle’s body electronics, and when it fails, it can cause a cascade of bizarre and unpredictable issues.
The BCM is the brain behind most of your vehicle’s cabin electronics. When it malfunctions, the symptoms can be widespread and confusing. An Expert’s Insight: From over 20 years in diagnostics, I’ve seen countless owners replace a BCM only to find out it still needs programming at the dealer, adding hundreds in cost and hassle.