Having problems with your 2003 Chevrolet TrailBlazer ?
2003 TRAILBLAZER RUNNING ROUGH AND SHUTS OFF AT FULL STOP, AND WHEN I TURN THE A/C ON THE RPM DROPS.I CHANGED THE PLUGS AND WIRES BUT IT DID NOT WORK, WHAT CAN IT BE?
Your throttle body need to be replace i just had the same problem
Throttle body needs to be cleaned.
Repair Help & Product Troubleshooting for 2003 Chevrolet TrailBlazer
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