Sedano Chevrolet Service Center in Santee anchors Mission Gorge Road at 10335 as the veteran-owned dealership's factory-authorized service arm, staffed by GM Certified Service technicians with multiple certified EV specialists on the roster. Post-collision structural work on GM-platform vehicles frequently requires OEM replacement panels sourced through the adjacent parts department, a supply chain that feeds directly into certified body repair at Fix Auto Santee on Prospect Avenue for insurance-routed claims. The MobileService+ program deploys purpose-built vans with factory diagnostic equipment to homes and workplaces for select maintenance tasks including software programming, battery health checks, and tire service without requiring a dealership visit. Chevrolet Bolt EV and Equinox EV battery diagnostics run through GM's proprietary GDS2 scan platform, and drivetrain faults beyond the EV high-voltage system route to Advanced Automatic Transmissions on Ablette Road when conventional powertrain components need bench-level rebuild. High-voltage battery pack isolation testing uses a 1,000-volt megohmmeter to verify insulation resistance across each cell module before clearing the vehicle for road service.