This procedure addresses speedometer cable replacement on the 2023 Chevrolet Bolt EUV, though this vehicle uses an electronic speed sensor system with no physical speedometer cable—this job likely involves diagnosing a speed signal issue or replacing the vehicle speed sensor.

Warnings

Tools required

Parts

• Vehicle Speed Sensor (if faulty) × 1 — Use OEM specification
• Speed sensor O-ring or seal × 1 — Included with sensor or use OEM specification

Preparation

1. Park vehicle on level surface and apply parking brake
2. Turn off vehicle and remove key fob from cabin
3. Allow vehicle to sit for 5 minutes to ensure all systems are fully powered down
4. Locate 12V battery in engine compartment
5. If diagnosing speed signal issue, use scan tool to identify which sensor is reporting faults before beginning physical work

Procedure

1. 1

   Disconnect 12V battery
   Using a 10mm socket, loosen the negative battery terminal bolt. Remove negative cable and secure away from battery post. Wait 2 minutes for vehicle systems to fully discharge.
   Torque spec

   Battery Terminal Bolts7 Nm (5 lb-ft)
2. 2

   Access vehicle speed sensor location
   The vehicle speed data comes from the ABS wheel speed sensors (located at each wheel hub) and the motor resolver (located in the drive unit). For typical speedometer issues, check the front wheel speed sensors first. If working on front sensors, turn steering wheel fully to access sensor through wheel well.
3. 3

   Inspect electrical connector
   Locate the speed sensor electrical connector. Press the locking tab and carefully disconnect the connector. Inspect connector terminals for corrosion, moisture, or damage. Check connector pins for proper tension.
4. 4

   Remove speed sensor mounting bolt
   Remove the single mounting bolt securing the wheel speed sensor to the hub assembly using a 10mm socket. Gently wiggle the sensor to break any corrosion seal, then pull straight out from the hub. Avoid twisting to prevent damage to the sensor tip.
   ⚠Do not pry against the sensor body or use excessive force—the sensor tip is fragile and can break off in the hub, requiring hub disassembly.
   Torque spec

   Mounting Bolts34 Nm (25 lb-ft)
5. 5

   Inspect sensor and mounting bore
   Examine the sensor tip for damage, metal debris buildup, or excessive wear. Check the hub bore for debris, corrosion, or damage. Clean the bore with a clean lint-free cloth if necessary. Inspect the tone ring (reluctor ring) on the CV axle for damage or missing teeth.
6. 6

   Install new or cleaned sensor
   If replacing, ensure new sensor O-ring is properly seated. Apply a thin coat of clean brake fluid to the O-ring to ease installation. Insert sensor straight into hub bore until fully seated—it should sit flush with the mounting surface. Do not force or twist during installation.
7. 7

   Secure sensor with mounting bolt
   Install the mounting bolt and torque to specification. Ensure the sensor body did not rotate during tightening and that it remains properly aligned with the tone ring.
   Torque spec

   Mounting Bolts34 Nm (25 lb-ft)
8. 8

   Reconnect electrical connector
   Align the connector and push firmly until the locking tab clicks into place. Gently tug on the connector to verify it is fully locked. Route the wiring to ensure it will not contact any rotating components or hot surfaces.
9. 9

   Reconnect 12V battery
   Clean both battery terminal and cable end with wire brush if corrosion is present. Reconnect the negative battery cable and torque the terminal bolt to specification. Ensure the cable is fully seated on the battery post before tightening.
   Torque spec

   Battery Terminal Bolts7 Nm (5 lb-ft)

Reassembly

1. If wheel or wheel well liner was removed for access, reinstall following proper torque specifications
2. Restore any vehicle settings that were reset by battery disconnection (clock, radio presets, driver preferences)
3. Perform power window auto-up/down relearn if necessary: with door open, raise window fully and hold switch up for 2 seconds, then lower fully and hold down for 2 seconds

Verification

• Use OBD-II scan tool to clear any stored speed sensor codes
• Start vehicle and verify no warning lights are illuminated on instrument cluster
• Test drive vehicle at various speeds (5-60 mph) and verify speedometer operates correctly throughout range
• Check for proper operation of ABS, traction control, and stability control systems
• Re-scan for codes after test drive to confirm no new faults have set
• Verify cruise control functions properly if equipped

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