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.
2018 GMC Terrain SLFACTORY OEM SERVICE PROCEDURE
Engine Controls And Fuel - 1.5L (LYX) - Repair Instructions
- Repair Instructions
- Crankshaft Position Variation Learn
- Fuel Rail Pressure Relief Valve Learned Values Reset
- HO2S Heater Resistance Learned Values Reset
- Intake System Learned Values Reset
- Throttle Body Idle Air Flow Compensation Reset
- Wire To Wire Repair - Engine Controls And Fuel
- Connector Reconnection - Engine Controls And Fuel
- Metal Collar Quick Connect Fitting Service
- Plastic Collar Quick Connect Fitting Service
- Evaporative Emission System Cleaning
- Engine Control Module Replacement
- Engine Control Module Bracket Replacement
- Accelerator Pedal Assembly Replacement
- Engine Coolant Temperature Sensor Replacement - Water Outlet
- Knock Sensor Replacement (Sensor 1)
- Knock Sensor Replacement (Sensor 2)
- Throttle Body Assembly Replacement
- Throttle Body Inspection And Cleaning
- Fuel Pressure Relief
- Fuel Tank Draining
- Fuel Tank Filler Pipe Replacement
- Fuel Feed Pipe Replacement (FWD)
- Fuel Feed Pipe Replacement (AWD)
- Fuel Tank Vent Hose Replacement (FWD)
- Fuel Tank Vent Hose Replacement (AWD)
- Fuel Tank Fuel Pump Module Replacement (FWD)
- Fuel Tank Fuel Pump Module Replacement (AWD)
- Fuel Tank Shield Replacement (FWD)
- Fuel Tank Shield Replacement (AWD)
- Fuel Tank Replacement (FWD)
- Fuel Tank Replacement (AWD)
- Fuel Tank Pressure Sensor Replacement (FWD)
- Fuel Tank Pressure Sensor Replacement (AWD)
- Fuel Tank Filler Hose Replacement (FWD)
- Fuel Tank Filler Hose Replacement (AWD)
- Fuel Pump Replacement
- Fuel Pump Fuel Feed Hose Replacement (FWD)
- Fuel Pump Fuel Feed Hose Replacement (AWD)
- Fuel Injection Fuel Rail Assembly Replacement
- Fuel Injector Replacement
- Fuel Injector Wiring Harness Replacement
- Fuel Injection Fuel Rail Fuel Pressure Sensor Replacement
- Fuel Pressure Sensor Replacement - Fuel Feed Pipe (FWD)
- Fuel Pressure Sensor Replacement - Fuel Feed Pipe (AWD)
- Fuel System Cleaning
- Fuel Feed Front Pipe Replacement
- Fuel Feed Intermediate Pipe Replacement
- Evaporative Emission Canister Replacement (FWD)
- Evaporative Emission Canister Replacement (AWD)
- Evaporative Emission Canister Filter Pipe Replacement (FWD)
- Evaporative Emission Canister Filter Pipe Replacement (AWD)
- Evaporative Emission Canister Purge Solenoid Valve Replacement
- Evaporative Emission Canister Purge Solenoid Valve Hose Replacement (FWD)
- Evaporative Emission Canister Purge Solenoid Valve Hose Replacement (AWD)
- Evaporative Emission Canister Purge Tube Replacement
- Evaporative Emission Canister Vent Solenoid Valve Replacement
- Evaporative Emission Canister Vent Hose Replacement (At Tank FWD)
- Evaporative Emission Canister Vent Hose Replacement (At Tank AWD)
- Evaporative Emission Canister Vent Hose Replacement (At Filler Pipe)
- Evaporative Emission Front Hose Replacement
- Evaporative Emission Front Pipe Replacement (FWD)
- Evaporative Emission Front Pipe Replacement (AWD)
- Ignition Coil Replacement
- Spark Plug Inspection
- Spark Plug Replacement
- Camshaft Position Actuator Solenoid Valve Replacement - Intake
- Camshaft Position Actuator Solenoid Valve Replacement - Exhaust
- Crankshaft Position Sensor Replacement (FWD)
- Crankshaft Position Sensor Replacement (AWD)
- Camshaft Position Sensor Replacement - Intake
- Camshaft Position Sensor Replacement - Exhaust
- Camshaft Position Actuator Locating Pin Control Valve Replacement
- Vacuum Pump Assembly Replacement
- Vacuum Pump Seal Replacement
- Air Cleaner Assembly Replacement
- Air Cleaner Element Replacement
- Air Cleaner Outlet Duct Replacement
- Charge Air Cooler Outlet Air Tube Replacement
- Charge Air Cooler Inlet Air Tube Replacement
- Charge Air Cooler Replacement
- Fuel Level Sensor Replacement (FWD)
- Fuel Level Sensor Replacement (AWD)
- Fuel Pump Power Control Module Replacement (FWD)
- Fuel Pump Power Control Module Replacement (AWD)
- Heated Oxygen Sensor Replacement - Sensor 1
- Heated Oxygen Sensor Replacement - Sensor 2
- Intake Air Pressure And Temperature Sensor Replacement
- Mass Airflow Sensor Replacement
- Engine Oil Pressure Sensor Replacement
- Intake Air Baffle Replacement
- Intake Air Duct Replacement
- Turbocharger Air Pressure Sensor Replacement
- Turbocharger Bypass Valve Solenoid Replacement
- Turbocharger Wastegate Actuator Replacement
- Turbocharger Wastegate Regulator Solenoid Valve Replacement
- Turbocharger Wastegate Regulator Solenoid Valve Hose Replacement (Wastegate Solenoid To Actuator)
- Turbocharger Wastegate Regulator Solenoid Valve Hose Replacement (Compressor Inlet To Solenoid)
- Turbocharger Wastegate Regulator Solenoid Valve Hose Replacement (Compressor Outlet To Solenoid)
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.