Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2020 GMC Acadia SLFACTORY OEM SERVICE PROCEDURE
Section 385 (Battery, Starting System And Charging System - Diagnostic Information And Procedures (2 Of 2))
WARNING: This page is about a different car, the 2023 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
- Diagnostic Information and Procedures
- DTC P3052, P3054, or P3056
- Diagnostic Instructions
- DTC Descriptor
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Actions Taken When the DTC Sets
- Conditions for Clearing the DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing - Starter System Test
- Circuit/System Testing - T19 Power Supply Transformer Input/Output Circuit Test
- Repair Instructions
- DTC P305D or P305E
- DTC U2800
- DTC U3006-U3009
- Proactive Alert Identifier SAC001
- Proactive Alert Identifier SAC002
- Proactive Alert Identifier SAC003
- Proactive Alert Identifier SAC004
- Proactive Alert Identifier SAC005
- Symptoms - Engine Electrical
- Symptoms - Stop/Start System
- Battery Inspection/Test
- Battery Charging
- Battery Electrical Drain/Parasitic Load Test
- Charging System Test
- Generator Noise Diagnosis
- Stop/Start System Malfunction
- Stop/Start Disable, Inhibit, and Restart Reasons
- Starter Malfunction
- Engine Cranks Slowly
- Starter Noise Diagnosis
- DTC P3052, P3054, or P3056
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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