Having problems with your 1999 GMC Jimmy ?
Temperature guage low - 1999 GMC Jimmy
Are you saying the thermostat is not working ?
Repair Help & Product Troubleshooting for 1999 GMC Jimmy
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.