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Cadillac 19178934 Sensor Asm,Heated Oxygen

1999-2000 Cadillac Escalade

GM 19178934 Sensor Asm,Heated Oxygen
  • Part Description
    SENSOR, Computer Control Sensors
  • Replaces
    25160540, 25312191
  • Manufacturer
    General Motors
Customer Questions & Answers
$74.05 MSRP: $139.72
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  • Product Specifications

    BrandGenuine Cadillac
    Manufacturer Part Number19178934
    Part DescriptionSENSOR, Computer Control Sensors
    Other NamesOxygen Sensor
    Item Dimensions8.1 x 2.1 x 2.1 inches
    Item Weight0.50 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    Replaces25160540, 25312191
    Require Quantity2
    ManufacturerGeneral Motors
    SKU19178934
    WarrantyThis genuine GM part is guaranteed by GM's factory warranty.
    Shipping & ReturnShipping Policy Return Policy
    Warning: California’s Proposition 65
  • Vehicle Fitment

    Year Make Model Engine Important vehicle option details
    1999-2000 Cadillac Escalade8 Cyl 5.7L1/2 TON, 3/4 TON, 4 DOOR 1/2 TON, CLASSIC 4 DOOR 1/2 TON, CREW CAB 1 TON, EXTENDED CAB 1 TON, EXTENDED CAB 6'6" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 3/4 TON, EXTENDED CAB 8' BOX 3/4 TON, K2500 CREW CAB, K3500 CAB CHASSIS 135.5, K3500 CAB CHASSIS 159.9, REGULAR CAB 1 TON, REGULAR CAB 3/4 TON, YUKON/DENALI/ESCALADE

Customer Questions & Answers

Q:
I am wonder if this is complete and correct part for my vehicle. Posted by GMPartsGiant Specialist
A:
You can Select Your Vehicle to check if 19178934 fits your vehicle.
Posted by GMPartsGiant Specialist
Q:
What is the role of an oxygen sensor in measuring exhaust gas? Posted by Customer
A:
The oxygen sensor plays a vital role in measuring the remaining oxygen in the exhaust gas after combustion and subsequently generates a voltage output of between 0.1 volt (indicating high oxygen, lean mixture) and 0.9 volts (indicating low oxygen, rich mixture). In early models (1988-1995), a single wire oxygen sensor is positioned in the exhaust pipe just after the exhaust manifold. In later models (1996-2000), there are four oxygens sensors with two of them being pre-converter oxygen sensors located before the catalytic converter. To regulate fuel injector pulse width, the PCM continuously monitors voltage from the pre-converter oxygen sensor in order to keep an air/fuel ratio of 14.7:1 which optimizes emission and performance of an engine. The post converter oxygen sensor however does not influence air/fuel ratio control but rather, it is used to monitor catalytic converter efficiency as evidenced by slower fluctuating voltage signals indicating low levels of oxygen after catalysts. Below this, during warm-up, there is no use for the sensor's feedback as ECM/PCM operates in open-loop mode. Oxygen sensors require heating elements to achieve operating temperature quickly. Proper sensor operation depends on electrical connections, adequate air supply, proper temperature and unleaded fuel usage. Oxygen sensors issues can be detected by ECM/PCM by setting diagnostic trouble codes known as DTCs relating to its malfunctioning or failure which can be determined by observing its response to input signal changes etc . When disconnecting it for testing purposes, extreme care should be taken to avoid damaging it and also provide jumper wires/backprobing under which case should not produce diagnostic trouble codes that are normally expected if one wants to do testing without risking any damage on car´s electric system although a diagnostic trouble code will still be triggered . With key on, voltmeter tests should indicate about 400-450 millivolts and for a warmed up engine, they should show voltage ranging from 100-900 millivolts for pre-converter sensors while post-converter sensors should show voltage within this range with no switching taking place. With the ignition on, in late models' oxygen sensor heater circuits it should be around 12 volts and heater resistance should be between 3.0 and 14.0 ohms. When replacing an oxygen sensor it must be done so that we do not damage pigtail and electrical connector, keep contaminants off of the sensor, avoid using cleaning solvents, and handle the sensor gently. Starting the engine briefly before replacement can ease removal. For secure removal of a post converter sensor, make sure that the vehicle is securely raised, disconnect the electrical connector if you are not quite sure how to use it yet, unscrew the sensor by employing your favorite tool for that purpose, apply anti-seize compound to its threads and then firmly fix it while reattaching its electrical connector after lowering down your vehicle.
Posted by GMPartsGiant Specialist
Q:
How is the feedback signal from the oxygen sensor used by the PCM for the 2005 Chevrolet Express? Posted by Customer
A:
The feedback signal is used by the PCM to determine the required fuel injector pulse width and control the air/fuel ratio.
Posted by GMPartsGiant Specialist
See expert answers on similar Oxygen Sensor
Q:
What are the specifications for the oxygen sensor heater circuits in the 1991 Chevrolet K1500, and how should you handle the replacement of oxygen sensors? Posted by Customer
A:
Late models' oxygen sensor heater circuits should register approximately 12 volts with the ignition on, and heater resistance should be 3.0 to 14.0 ohms. When replacing oxygen sensors, handle them with care, avoid damage to the pigtail and electrical connector, prevent contaminants from affecting the sensor, refrain from using cleaning solvents, and handle the sensor gently.
Posted by GMPartsGiant Specialist
See expert answers on similar Oxygen Sensor
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Genuine GM Part 19178934, the Right Choice

Your vehicle deserves only genuine OEM GM parts and accessories. To ensure reliability, purchase GM part # 19178934 Sensor Asm,Heated Oxygen. It is sometimes referred to as Cadillac Oxygen Sensor. Our GM parts and accessories are expedited directly from authorized GM dealers strategically located all across the U.S. and are backed by the manufacturer's 12 month, 12,000 mile warranty. OEM GM parts are the best for restoring your vehicle to factory condition performance. This part fits specific Cadillac Escalade models.

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