One problem related to gas recirculation valve (egr valve) has been reported for the 2004 Chevrolet 1500. The most recently reported issues are listed below.
Annoying expansion sound from muffler/exhaust system when vehicle is stopped and parked for about 15 minutes. No fix for problem yet.
| Engine And Engine Cooling problems | |
| Water Pump problems | |
| Check Engine Light On problems | |
| Gas Recirculation Valve (egr Valve) problems | |
| Manifold/header/muffler/tail Pipe problems |