SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2019TAHOE LS, 4WD, GAS/ETHANOLREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 32 (ENGINE CONTROLS/FUEL - 1.4L (LUV) - REPAIR INSTRUCTIONS)REPAIR INSTRUCTIONSHEATED OXYGEN SENSOR REPLACEMENT - SENSOR 1
2019 Chevrolet Tahoe LS, 4WD, Gas/Ethanol

Heated Oxygen Sensor Replacement - Sensor 1

2019 Chevrolet Tahoe LS, 4WD, Gas/EthanolSECTION Heated Oxygen Sensor Replacement - Sensor 1
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.
GM3559767Courtesy of GENERAL MOTORS COMPANY
Callout Component Name
WARNING:

In order to avoid being burned, do not service the exhaust system while it is still hot. Service the system when it is cool.

Preliminary Procedure Disconnect battery negative cable. Refer to Battery Negative Cable Disconnection and Connection .
1 Heated Oxygen Sensor 1
CAUTION:

Refer to Component Fastener Tightening Caution .

Procedure

  1. Remove the wiring harness from retainer clip.
  2. Disconnect electrical connector.
  3. After replacement of the heated oxygen sensor, use a scan tool to speed up learn functions. Refer to K20 Engine Control Module: Programming and Setup .
    NOTE:

    A special anti-seize compound is used on the HO2S threads. The compound consists of liquid graphite and glass beads. The graphite tends to burn away, but the glass beads remain, making the sensor easier to remove. New, or service replacement sensors already have the compound applied to the threads. If the sensor is removed from an exhaust component and if for any reason the old sensor is to be reinstalled, the threads must have anti-seize compound applied before the reinstallation. Refer to Adhesives, Fluids, Lubricants, and Sealers .

  4. Perform the HO2S heater resistance learned values reset. HO2S Heater Resistance Learned Values Reset 

Tighten 
42 N.m (31 lb ft)
Special Tools 
EN-48259  Installer/Remover
For equivalent regional tools, refer to Special Tools (Diagnostic Tools)
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

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.