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2002 2500 GMC knock sensor

Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by RAV52202, May 9, 2013.

  1. RAV52202

    RAV52202 Member 100 Posts

    How hard is it to change a knock sensor on my truck. What do i need to do to remove it? It is sensor #1 bank1. Thank you for any info.
  2. j cat

    j cat Rockstar 4 Years 1000 Posts

    what is the failure code ? what is the issue ?
  3. sierra11

    sierra11 Rockstar 100 Posts

    Um not sure your code but I had a scan done on mine and the guy at the shop said the intake manifold had to come off. Don't quote me I didn't get around doing it because after about 2 weeks there wasn't a code being thrown anymore.
  4. RAV52202

    RAV52202 Member 100 Posts

    I dont remember off the top of my head, but it said sensor 1 bank 1 low voltage. i clear the code and it comes right back on.
  5. shibby2oo8

    shibby2oo8 Member 2 Years 100 Posts

    Prob the harness or the tube got water in it and killed the sensor. On all the v8's its in the valley pan below the intake. Dry intake so easy job as long as you unbolt or pinch off the throttle body coolant lines. Pop the intake off and they sit right below in the valley, replace the harness and sensors, silicone the boots that seal the tubes so crap doesnt get in again and put the intake back on. Buy new gaskets for the intake and tb, valve covers and coils stay on so it nice easy.
  6. RAV52202

    RAV52202 Member 100 Posts

    Thank you for all the info. This forum rocks. Glad I found it.
  7. j cat

    j cat Rockstar 4 Years 1000 Posts

    get the DTC again and post here what it is . bank and sensor tells me this is the O2 sensor not a knock sensor.

    bank one , sensor one is driverside upstream cat converter O2 sensor. replace both upstream sensors.
  8. shibby2oo8

    shibby2oo8 Member 2 Years 100 Posts

    There are 2 sensors front and back and some scanners may decode it as banks. Common prob and not too expensive to fix.
  9. RAV52202

    RAV52202 Member 100 Posts

    Yeah, i havent had a chance to get the code again yet, but it did say low voltage on knock sensor 1 bank 1.
    Thanks for all the help. I wont be able to work on the truck for about 8 weeks right now due to surgery on wrist but i will let you guys know how it worked out when I can get to it.
  10. j cat

    j cat Rockstar 4 Years 1000 Posts

    KS DTC would be circuit 1 or 2 . the dtc would be 327 / 332 .. 1 is front 2 is rear .

    the O2 sensor would be bank 1 sensor 1 low voltage DTC 131 .

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