2003 Grand Prix Trans Cooler Line Replacement

**zmaddox5306** · 02-23-2013

I have a 2003 Grand Prix 3.8 (K vin, no super charger) when I was changing the trans filter and replacing the leaking pan gasket I noticed oil on the air deflector. After further inspection I notice that the lines running to the trans cooler are leaking where the steel meets the rubber. One is leaking rather badly not sure if the other is leaking. I plan on replacing both since I already have to fill the trans.

My question is how do they connect to the trans and the cooler? It looks like they are just a hex nut with a flare or compression under it. Is that correct? Is there a trick to removing them? Anything else to watch out for while changing them?

Thanks for your help!

**Fivefingerdeathpunch** · 02-23-2013

On the cooler line, at the end where it either goes into the transmission or the radiator, is a small clip. Grab a small angle pick and remove it, and don't lose it or you'll have to go buy a new one. Inside the fitting is a rubber o-ring and the line just slides over that untill, then the clips holds it from coming out.

They look like this.