ok guys, this is kind of hard to explain, i dont know if this a natural sound on tahoe's. I have a 5.7L Lt 4wd. i bought it not too long back and it has done this since i've had it. When i start off from stop, there is a shifting/sliding sound in the back of the vehicle. i was wondering if the leaf springs shifted, and if they did could i fix the sound by just oiling my leafs? or does this have completely nothing to do with the sound. The sound itself doesnt last long, its pretty much instantaneous, but sounds like a metal on metal shift. all info is welcome, and thanked

 

If you find out what it is let me know; my 99 Silverado 4wd 1500, does the same thing

 

I have a 2000 silverado with the same sound. It drove me crazy trying to find the source of the noise. Finally I found out that a few other silverado owners had the same noise. After researching we found that the noise is common on trucks with steel driveshafts. Trucks with the aluminum shafts don't make this noise. COULD BE YOUR NOISE TOO!!!!!!!