Question about 2003 Hummer H2
Posted by Anonymous on
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Posted on Jan 02, 2017
What you have to do is replace the o2 sensor on bank 1 sensor 1.This is the front sensor on the left side on the exhaust system.Left side is bank 1 and right side is bank 2.Make sure the connections are good first.Usually it`s the internal heater in the o2 sensor.Hope this helps.Good luck.
Posted on Dec 12, 2009
Left side (number 1 cylinder) in the exh pipe.(Number 1 sensor) Number 2 sensor is AFTER the Cat Converter.
Posted on Dec 30, 2009
Testimonial: "thanks alot man. i kinda figured it out when i went underneath."
SOURCE: change light on 2006 hummer h2
it can be easily changed by removing the plastic cover then u will see the light bulb, don't try to change it from the back, it wont open :)
Posted on Sep 08, 2009
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