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.
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HOMESERVICE MANUALSGMC2016ACADIA SLT, FWDREPAIR AND DIAGNOSISENGINE MECHANICALCOOLING SYSTEM (MECHANICAL)ENGINE COOLING SYSTEM
2016 GMC Acadia SLT, FWD
Engine Cooling System
2016 GMC Acadia SLT, FWDSECTION Engine Cooling System
- Specifications
- Schematic Wiring Diagrams
- Diagnostic Information and Procedures
- DTC P0480, P0481, P0691, P0692, P0693, or P0694: Cooling Fan Relay
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the MIL/DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- DTC P1258: Engine Coolant Overtemperature
- Symptoms - Engine Cooling
- Cooling Fan Always On
- Cooling Fan Inoperative
- Engine Overheating
- Loss of Coolant
- Thermostat Diagnosis
- Coolant Heater Inoperative
- Engine Fails To Reach Normal Operating Temperature
- Pressure Cap Testing
- Coolant Leak Testing
- DTC P0480, P0481, P0691, P0692, P0693, or P0694: Cooling Fan Relay
- Repair Instructions
- Hose Clamp Replacement Guidelines - Spring Type
- Cooling System Draining and Filling (Static Fill)
- Cooling System Draining and Filling (Vac N Fill)
- Flushing
- Radiator Cleaning
- Coolant Recovery Reservoir Replacement
- Radiator Inlet Hose Replacement
- Radiator Outlet Hose Replacement
- Engine Oil Cooler Connector Replacement
- Engine Oil Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection
- Cooling Fan and Shroud Replacement
- Engine Coolant Thermostat Housing Replacement
- Water Outlet Replacement
- Water Pump Replacement
- Radiator Replacement
- Radiator Air Side Baffle and Deflector Replacement
- Coolant Heater Replacement
- Coolant Heater Cord Replacement
- Description and Operation
- Special Tools and Equipment
RENDER: 1.0x
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Recommended Tools & Savings
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.