re: 2006 1500 5.3 L "B" engine (323 cubic inch) Silverado (automatic transmission) Would someone kindly tell me what Dexron ATF is used for the above truck? Also, what's used in the transfer case. A call to a dealer may be my last resort for official fluids and capacities. The used truck did not come with an owner's manual and I have had a terrible time finding one on-line in pdf. file format. All I found was an owners manual that had 32 pages full of pictures and that isn't what I need.