Quote Originally Posted by shawngtp View Post
Glad to help ya out man. But before you change your fluid you really shoud think about buyin the trans go shift kit from TEP and install it while you are in there. You WILL love you gp more. Here is the link if you are interested. Half way down the page. Upgrades
I have one ready to replace the wbody store shfit kit in mine and one for my brothers 03.

For all of those asking why he recommended to stick with dex 3 versus switching to dex 6, I will post his email reply so I don't misquote him. Dave thanks for the info and he can help those out with the 04+, as I am not sure which years dex 6 was introduced into the newer vehicles.

Dex VI is a good fluid and supposed to be backwards compatible with Dex 3 which is what came in your vehicles. I personally am not a big fan of switching fluids on a matured transmission and since VI is a bit thinner and a synthetic blend you could run into excessive slippage problems and set code P1811 if the pcm cant compensate enough. Your 03 is the best shot and changing fluids, the other two I would keep using Dex3 to be safe



David Norris
Email: Dave@tripleedgeperformance.com
Website: Triple Edge Performance - Home Page