Home > Performance Aids > O2 Simulator & Tester GM 4 Wire (General Motors 1996-2003)

O2 Simulator & Tester GM 4 Wire (General Motors 1996-2003)



Click to enlargeThe O2 simulator is a plug-in replacement for the secondary O2 sensor that will provide the PCM with a signal that emulates a healthy cat for testing and off-road purposes. An extremely compact circuit board (.45 x .45 inches) is molded into the end of the connector to provide the most compact and water resistant simulator on the market.

Installs in less than 10 minutes and does not require any tools. The O2 simulator is standalone and as such does not need to be located anywhere near the exhaust system. It is further recommended that the harness connecting to the o2 simulator be coiled up and cable tied (with included cable tie) away from the hot exhaust that could damage the casing of the simulator if it comes in contact with it. Some vehicles such as F-bodies with front dual exhaust have four oxygen sensors and require two simulators per vehicle.

For off-road/competition/testing use only. Not to be used on any vehicle driven on a public road. Vehicle owners are responsible for complying with all local emissions laws. Vehicle owners accept these terms and conditions by placing their order.

Applications: Most 1996-2003 GM OBDII passenger vehicles should be able to use this configuation. Please double check your o2 sensor and compare it to the chart below to identify the type you need. Types 5 & 8 are not in use.

LS1 F-Body (Camaro/Firebird) cars use two Type 1.

PLEASE READ! Problem Vehicles: These do not work for all 2000+ full size GM trucks (Sierra, Silverado, Suburban, Tahoe). Also, the 2003 Chevy S10 and 2002 Cavalier/Grand Am and all Saturn vehicles.




EP-O2S$55.00
Select Year: 
Select Make: 
Enter Model of Vehicle:
Enter Engine Size/Rating (i.e. 5.7L, 3.8L, V6):
Select Connector Type (see chart): 


o2 Simulator Connector Chart
o2 Simulator Connector Chart

Factory Sensor End (type 1)
Factory Sensor End (type 1)

Type 1
Type 1

Type 2
Type 2

Type 4
Type 4


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