1. Mass Airflow sensor(MAF)
2. Throttle Body       3. Throttle Actuator control (TAC)   4. Fuel Injector
5. PCV Valve          6. Evap Purge Solenoid
Engine data sensor and control component locations on the GM 3500 V6 engine. Click on
number for a description. This engine is the latest rendition of the popular 3.4L engine.
It has been redesigned with much better air intake system, advanced engine timing, more
accurate sensor, more total sensors and improved ignition and fuel injection systems.
View the picture below to find the location of sensors or other parts that you may need to
replaced because of a check engine light and codes that were scanned.
Click on the number to find descriptions of these parts and their related emissions
systems. Additional pictures for each individual sensor are included in some of these.

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GM 3500 Engine Sensors And Locations