Having problems with your 1999 GMC Yukon ?
O why won't my back doors speakers work with my
Got me on this. I would suspect you have the system hooked up incorrectly.
Repair Help & Product Troubleshooting for 1999 GMC Yukon
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.