List Of 2004 Gmc Sierra 2500Hd Flashing Check Engine Light References. Said it was a random cylinder misfire. To help you better understand what you should do next, we've outlined possible scenarios:
Web the way your check engine light is behaving can help you determine what might be wrong with your gmc, and the severity of the issue. If the check engine light is coming on intermittently, be sure. If your sierra 1500’s check engine light is red, you should stop driving immediately.
