2006 GMC P0562: What It Means & Is It Safe to Drive?
P0562 on the 2006 GMC: System Voltage Low. Here's what it means, what usually causes it, what repairs typically cost, and whether it's safe to keep driving.
What this code means
The PCM has detected that system voltage is below the acceptable threshold. Usually points to a failing battery, alternator, or a poor ground connection.
Common causes on the 2006 GMC
- Weak or failing battery
- Failing alternator not producing sufficient output
- Poor battery cable or ground connections
- Parasitic draw draining the battery
Symptoms
- Check Engine Light
- Dim headlights
- Electrical accessories acting erratically
- Hard starting or slow cranking
Typical fixes
- Load-test battery and replace if weak
- Test alternator output and replace if low
- Clean battery terminals and ground connections
Repair cost range
For a 2006 GMC, repairs for P0562 typically fall between $100 and $500, depending on the root cause and labor rates in your area.
Known issues on GMC
GMC P0562 low voltage on Sierra and Yukon trucks typically means a failing alternator or battery. On Terrain with the 2.4L Ecotec, a faulty body control module can cause parasitic drain that depletes the battery overnight—check for excessive parasitic current before replacing the alternator.
Most commonly affected models