1997 GMC Yukon 5.7L Engine P0300 Random Misfire Code - Cold Start Hesitation Resolves After Warm-Up

Model: 1997 5.7 Yukon Fault Code: P0300 Posted: 2011-06-25 15:25

Hello everyone, I recently purchased a 1997 GMC Yukon with a 5.7L V8 engine. The truck passed smog testing, but it's currently displaying a P0300 diagnostic trouble code. When the engine is cold and first starting, it exhibits noticeable hesitation. However, once the engine warms up, it runs smoothly without any issues. I haven't performed any repairs yet to avoid unnecessary expenses. Can anyone provide insight into possible causes of this random misfire during cold starts? Any troubleshooting tips or common fixes for this issue on 1997 Yukon models would be greatly appreciated.