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So I got my truck back from the dealer and there is too much transmission fluid in it. I need to drain about a quart out. From what I read the easiest way to do it is to pull a line from the transmission cooler. I have a radiator, what looks like a core / cooler for the AC/HVAC, and a small cooler in front of those. It is a 2004 Z71 4X4 with the 4.8l motor. I need to know which of these is the transmission cooler, and which line I should pull at the cooler. Thanks in advanced... Pics Attached
IMG-20110630-00001.jpg
 

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So I got my truck back from the dealer and there is too much transmission fluid in it. I need to drain about a quart out. From what I read the easiest way to do it is to pull a line from the transmission cooler. I have a radiator, what looks like a core / cooler for the AC/HVAC, and a small cooler in front of those. It is a 2004 Z71 4X4 with the 4.8l motor. I need to know which of these is the transmission cooler, and which line I should pull at the cooler. Thanks in advanced... Pics Attached
View attachment 28333
The Transmission Cooler is the Small one in the Front/Center in your Picture....sorry I can't remember which line you need to pull??
 

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Thanks! Do you by any chance know which line is the line coming from the transmission into the cooler?
 

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Thanks! Do you by any chance know which line is the line coming from the transmission into the cooler?
Sorry....I can't remember, what you can do is pull...Dic-connect one line and have a bucket/can to catch any fliud and a friend to hold the bucket by the line you Di-connect, once you start the truck, will see Trans fluid coming out,.....if not then it's the other line....that's the only way I would know which line it would be.
 

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Let the truck completely cool and then start and hold both the cooler lines with your hands. The warmer line is the inlet and the cooler side is the outlet.
 

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Are you sure you checked the level correctly, in park, transmission hot, and engine running? Are you sure that the dealer put a quart too much in? Checking the transmission fluid in any other condition than I outlined will cause the reading to be higher than it really is.
 

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X2 on what crawdaddy said and make sure it is on level groound
 
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