How to fix 'Service 4WD' message on 1999 What Does Service 4wd Mean On Chevy Silverado
The “Service 4WD” message on your Silverado 1500 means the system has found a fault it can't clear on its own. This alert comes from the truck's Service 4wd - 2014-2018 Silverado & Sierra Troubleshooting - GM I just had the same problem. Took my truck to Frank Parra (Chevy dealership in Dallas, TX) and asked that they reprogram my unit. I had tried ...