GMC Troubleshooting Questions? Ask a Mechanic for Answers
Hello and welcome! My name isCustomerand I can assist you with your question. It sounds like the battery is bad or has a low charge. It could be a bad connection at or after the battery as well. Have you checked the battery voltage? If so, what is it at?
Ok, good. YES, you can use a voltmeter to check the battery voltage. You are going to need to start there.
YES, set your voltmeter to the 20 volt DC scale. A fully charged battery is 12.6 volts.
Sounds good. Your welcome!