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PostPosted: Sat Jan 13, 2018 6:41 pm 
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SLE Member
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Joined: Wed Jan 14, 2015 10:10 pm
Posts: 41
Year and Trim: 2004 Buick Lesabre Limited
Gran Touring package
My transmission cooler lines are starting to leak at the flex-to-rigid joint so it's time for new lines. The car is a 2004 but I should be subscribing to 2003 car's connectors because I figured out that I have a 1/4-18 return fitting(transmission side, screws parallel to ground) when I had to replace it a couple years ago.
The 1/4-18 return fitting belongs on cars built prior to January 19th, 2004. So, according to Triple Edge Performance I also need a 3/8-18 feed fitting w/check ball LINK: http://shop.tripleedgeperformance.com/4T65E-2000-2003-Quick-Connect-Feed-Fitting-24213958.htm.
That takes care of the transmission end of the lines, but I don't know about the radiator side.
Dorman calls out two fittings for radiator side: part number 800-605 with 5/8-18 threads, and 800-721 with M18x1.5 threads.

Can anyone confirm if Dorman is right? I am surprised one fitting would be standard and one is metric.
Dorman link: https://www.dormanproducts.com/gsearch.aspx?year=2003&make=Buick&model=LeSabre&origin=YMM&parttype=Transmission%2520Oil%2520Cooler%2520Connector
Thanks


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PostPosted: Mon Jan 15, 2018 8:23 am 
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SSE Member
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Joined: Tue Jan 07, 2014 4:21 pm
Posts: 117
Year and Trim: 2003 SSEi
1999 Park Ave. Ultra L67
Use GM parts. Give dealer your VIN, and they should give you the correct parts. Fit is better than aftermarket also.


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