Having problems with your 2003 GMC Sonoma Extended Cab ?
2003 GMC Sonoma ZR2. I just bought this vehicle and have been reading forums about common problems. I had the faulty transfer case vacuum swith and put a new one in today. I blew the line out form the 4x4 actuator under the battery tray, the HVAC line up by the brake master cylinder and the vent tube. They all had some fluid in them. I haven't had any problems with my HVAC. Should I do anything else to prevent future problems or leave it alone?
Repair Help & Product Troubleshooting for 2003 GMC Sonoma Extended Cab
Tips for a great answer:- Provide details, support with references or personal experience .
- If you need clarification, ask it in the comment box .
- It's 100% free, no registration required.