I have a 2004 lly with a juice/attitude and otherwise stock. Up to now everything was running well except some fuel knock and low rpm surge. Took off j/a and brought it to the dealership for the 16000 mi. service. Asked them to change transfer case and tranny fluid for Mobil 1 synthetic ATF(I live in Canada and feel that the synthetic fluid would perform better in the cold than the original dino fluid), and asked for a reflash. Tech found the following stored codes: P1226,P1229,P1238,P1241,P1244. They subsequently did the reflash. Since getting the truck back, I noticed a slight but constant driveline vibration (similar to when you engage the front axle in 4wd). Prior to the service, my attitude reported some tranny slip in 1st to 4th gears (up to 20-30%) but 0% slip once the converter locked. Since the service the attitude reports 100% slip all the time. The truck is otherwise running well, although I haven't really pushed it as the weather currently is very cold (-20 to -30 C).

Anyone know what those codes refer to?
Has anyone had a similar experience or any thoughts as to what could be causing this? Any help would be greatly appreciated before I bring the truck back to the dealership in 3 days. Thanks in advance.

I noticed that if you put the Edge/Attitude on "0-Stock" that the tranny slippage will show 100% slippage. in Level 1-5 it works fine showing % of slippage between shifts.

20-30% slip between shifts without T/H mode on sounds normal.

I had the exact same problem with my attitude showing that 100% slippage. It happened when we got are first cold batch of air here in Mn. Called edge and they sent me out a new J/A. Replaced and haven't had a problem. Call edge.
JHD