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 MANUALSCHEVROLET2019BLAZER PREMIER, FWDREPAIR AND DIAGNOSISBODY & FRAMEDOOR LOCKSVEHICLE ACCESS SYSTEMDIAGNOSTIC INFORMATION AND PROCEDURESDTC B396E - LIFTGATE CLOSE SWITCH MALFUNCTIONCIRCUIT/SYSTEM TESTING
2019 Chevrolet Blazer Premier, FWD
Circuit/System Testing
2019 Chevrolet Blazer Premier, FWDSECTION Circuit/System Testing
- Ignition/Vehicle & All vehicle systems - Off
- Disconnect the electrical connector: B70 Liftgate Close Switch
- Verify a test lamp turns On between the test points: Low Reference terminal 4 & B+
- If the test lamp does not turn On
- Disconnect the electrical connector: K39 Liftgate Control Module
- Test for less than 2 ohms between the test points: Low Reference terminal 4 @ Component harness & Terminal 16 X1 @ Control module harness
- If 2 ohms or greater - Repair the open/high resistance in the circuit.
- If less than 2 ohms - Replace the component: K39 Liftgate Control Module
- Go to next step: If the test lamp turns On
- Ignition - On/Vehicle - In Service Mode
- Verify the scan tool parameter: Liftgate Rear Close Switch = Inactive
- If not the specified state
- Ignition/Vehicle - Off
- Disconnect the electrical connector: K39 Liftgate Control Module
- Test for infinite resistance between the test points: Signal circuit terminal 3 @ Component harness & Ground
- If less than infinite resistance - Repair the short to ground on the circuit.
- If infinite resistance - Replace the component: K39 Liftgate Control Module
- Go to next step: If the specified state
- Connect a 3 A fused jumper wire between the test points: Signal circuit terminal 3 & Low Reference terminal 4
- Verify the scan tool parameter: Liftgate Rear Close Switch = Active
- If not the specified state
- Ignition/Vehicle - Off & Remove - Jumper wire(s)
- Disconnect the electrical connector: K39 Liftgate Control Module
- Ignition - On/Vehicle - In Service Mode
- Test for less than 1 V between the test points: Signal circuit terminal 3 @ Component harness & Ground
- If 1 V or greater - Repair the short to voltage on the circuit.
- Go to next step: If less than 1 V
- Ignition/Vehicle - Off
- Test for less than 2 ohms between the test points: Signal circuit terminal 3 @ Component harness & Terminal 3 X1 @ Control module harness
- If 2 ohms or greater - Repair the open/high resistance in the circuit.
- If less than 2 ohms - Replace the component: K39 Liftgate Control Module
- Go to next step: If the specified state
- Test or replace the component: B70 Liftgate Close Switch
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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.