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HOMESERVICE MANUALSCHEVROLET2019TAHOE LS, 4WD, GAS/ETHANOLREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 58 (POWER DOOR LOCK SYSTEM AND RELEASE SYSTEMS)DIAGNOSTIC INFORMATION AND PROCEDURESTRUNK RELEASE MALFUNCTIONCOMPONENT TESTING
2019 Chevrolet Tahoe LS, 4WD, Gas/Ethanol

Component Testing

2019 Chevrolet Tahoe LS, 4WD, Gas/EthanolSECTION Component Testing
WARNING: This page is about a different car, the 2018 Chevrolet Sonic. However, it is still accessible from the selected car via links, so may be relevant.

Relay Test

  1. Ignition/Vehicle - Off
  2. Remove the component: KR95B Rear Compartment Lid Unlatch Relay
  3. Test for 70 to 110 ohms between the test points: Component terminal 85 & 86
    • If not between 70 and 110 ohms 

      Replace the component: KR95B Rear Compartment Lid Unlatch Relay

    • Go to next step: If between 70 and 110 ohms 
  4. Test for infinite resistance between the test points:
    • Component terminal 30 & 85
    • Component terminal 30 & 86
    • Component terminal 30 & 87
    • Component terminal 85 & 87
    • If less than infinite resistance 

      Replace the component: KR95B Rear Compartment Lid Unlatch Relay

    • Go to next step: If infinite resistance 
  5. Connect a 3 A fused jumper wire between the test points: Component terminal 86 & 12 V

    Connect a jumper wire between the test points: Component terminal 85 & Ground

  6. Test for less than 2 ohms between the test points: Component terminal 30 & 87
    • If 2 ohms or greater 

      Replace the component: KR95B Rear Compartment Lid Unlatch Relay

    • Go to next step: If less than 2 ohms 
  7. All OK.

M40 Rear Compartment Lid Latch-Dynamic Test

  1. Ignition/Vehicle - Off
  2. Disconnect the electrical connector: M40 Rear Compartment Lid Latch
  3. Connect a jumper wire between the test points: Ground terminal 2 & Ground
  4. Momentarily connect a 10 A fused jumper wire between the test points: Control terminal 1 & 12 V

    Verify the component turns On and Off when connecting and disconnecting the jumper wire: M40 Rear Compartment Lid Latch

    • If the component does not turn On and Off 

      Replace the component: M40 Rear Compartment Lid Latch

    • Go to next step: If the component turns On and Off 
  5. All OK.

S48E Multifunction Switch - Center Console

  1. Ignition/Vehicle - Off
  2. Disconnect the electrical connector: S48E Multifunction Switch - Center Console
  3. Test for infinite resistance between the test points: Signal terminal 7 & Ground terminal 9 - Not Pressed
    • If less than infinite resistance 

      Replace the component: S48E Multifunction Switch - Center Console

    • Go to next step: If infinite resistance 
  4. Test for less than 3 ohms between the test points: Signal terminal 7 & Ground terminal 9 - Pressed
    • If 3 ohms or greater 

      Replace the component: S48E Multifunction Switch - Center Console

    • Go to next step: If less than 3 ohms 
  5. All OK.

S58 Rear Compartment Lid Unlatch Switch

  1. Ignition/Vehicle - Off
  2. Disconnect the electrical connector: S58 Rear Compartment Lid Unlatch Switch
  3. Test for infinite resistance between the test points: Signal terminal 1 & Ground terminal 2 - Not Pressed
    • If less than infinite resistance 

      Replace the component: S58 Rear Compartment Lid Unlatch Switch

    • Go to next step: If infinite resistance 
  4. Test for less than 3 ohms between the test points: Signal terminal 1 & Ground terminal 2 - Pressed
    • If 3 ohms or greater 

      Replace the component: S58 Rear Compartment Lid Unlatch Switch

    • Go to next step: If less than 3 ohms 
  5. All OK.
RENDER: 1.0x

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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.