for the longest time i heard this chime coming from the back of my truck every once in a while. couldn't figure it out. then when i was changing a flat once i heard the sound while getting my jack out... it was the little metal clip on the strap that holds the tools in. oof!If you are hearing squeaking from that area I would check two things first.
1. Make sure the latch for the rear seat isn't making the noise. Try folding the seat forward a bit and test drive it. Wrap some electrical tape around the metal loop to fix the squeak.
2. Make sure the jack and/or tools aren't banging around back there.
for the longest time i heard this chime coming from the back of my truck every once in a while. couldn't figure it out. then when i was changing a flat once i heard the sound while getting my jack out... it was the little metal clip on the strap that holds the tools in. oof!