Location of oxygen sensor

Tiny
2CARPROS-ARCHIVES
  • MEMBER
  • 1996 GMC SIERRA
  • V8
  • 2WD
  • AUTOMATIC
  • 125,000 MILES
The service manual for my 1996 GMC Sierra tells me that my truck has four oxygen sensors. They are designated: Bank 1 Sensor 1, Bank 1 Sensor 2, Bank 1 Sensor 3, and, Bank 2 Sensor 1. The manual does not clearly indicate the location of each of these sensors. A GMC technician tells me that the term "Bank" refers to a particular side of the engine - Bank 1 refers to the side with cylinder number 1, the driver's side (as the plug wires are numbered 1, 3, 5, 7). You'd think it would be easy to deduce the placement of each oxygen sensor. Here's the problem: Only one oxygen sensor lies beneath Bank 1. The other three are under Bank 2, two in front and one behind the catalytic converter. My information seems to be contradictory. Error code P0153 tells me I need to replace Bank 2 Sensor 1. Can you verify its location?

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Monday, January 10th, 2011 AT 9:03 PM

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Tiny
2CARPROS-ARCHIVES
  • MEMBER
Somewhere along the line, you have gotten incorrect information. Whichever cylinder bank has three oxygen sensors must be bank 1. The cylinder bank with 1 sensor is bank 2.

Here is a guide to help you change the oxygen sensor out with diagrams below to show you the locations.

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.

Cheers, Ken
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Monday, January 10th, 2011 AT 9:05 PM

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