What causes P0562 on a GMC Terrain?

Common causes of P0562 on GMC Terrain: Weak or failing battery (most common cause); Corroded battery terminals or cable connections; Failing alternator or voltage regulator; Excessive parasitic draw draining battery overnight; Poor ground connection at engine or body.

P0562

P0562 GMC Terrain

Q: How much does it cost to fix P0562 on a GMC Terrain?

Fixes for P0562 on GMC Terrain include: Test battery with load tester and replace if weak (use GM-recommended Group 48/H6 or equivalent), Clean and tighten battery terminals and cable ends, Test alternator output (should be 13.8-14.7V at idle), Test for parasitic draw (should be under 50mA with vehicle off), Check and clean engine and body ground straps.

System Voltage Low · Powertrain Code · High · Repair: Easy

What is P0562?

System voltage is below the expected range. Could indicate a failing alternator, bad battery, or excessive electrical draw.

When the GMC Terrain triggers code P0562 (system voltage low), it typically points to an issue in the powertrain system. This is a high severity code, so address it promptly to avoid further damage or safety concerns. Below you'll find the most common causes, symptoms, and repair options specific to the GMC Terrain.

This repair is rated easy, meaning basic tools, no lift needed.

Diagnostic data on this page is compiled from publicly available repair resources and technical service bulletins. Always have a qualified mechanic confirm the diagnosis before authorizing repairs on your GMC Terrain.

Common Causes on GMC Terrain

Weak or failing battery (most common cause)
Corroded battery terminals or cable connections
Failing alternator or voltage regulator
Excessive parasitic draw draining battery overnight
Poor ground connection at engine or body

Symptoms

Check Engine Light on
Dim headlights or dashboard lights
Slow engine cranking
Multiple warning lights on dashboard
Battery dies overnight or after sitting

Recommended Fixes

Test battery with load tester and replace if weak (use GM-recommended Group 48/H6 or equivalent)

Clean and tighten battery terminals and cable ends

Test alternator output (should be 13.8-14.7V at idle)

Test for parasitic draw (should be under 50mA with vehicle off)

Check and clean engine and body ground straps

Notes for GMC Terrain

GM vehicles with numerous electronic modules are sensitive to voltage drops — always check battery health first as a weak battery can trigger multiple unrelated codes.

P0562 GMC Terrain

What is P0562?

Common Causes on GMC Terrain

Symptoms

Notes for GMC Terrain

Check GMC Terrain Specs