[Strongbow]

I have a '13 LTZ and I need to flush my transmission, but I'm unsure of which of the 4 lines going into the radiator that appear to come from the transmission I need to take loose. For some reason, it is never mentioned in anything I have seen about doing a flush. I know it isn't the top one. I would guess one, or either, of the middle ones.

 

[1999 White C5 Coupe]

I have a '13 LTZ and I need to flush my transmission, but I'm unsure of which of the 4 lines going into the radiator that appear to come from the transmission I need to take loose. For some reason, it is never mentioned in anything I have seen about doing a flush. I know it isn't the top one. I would guess one, or either, of the middle ones.

https://static.nhtsa.gov/odi/tsbs/2012/SB-10062497-7690.pdf

 

[sheila]

I have a '13 LTZ and I need to flush my transmission, but I'm unsure of which of the 4 lines going into the radiator that appear to come from the transmission I need to take loose. For some reason, it is never mentioned in anything I have seen about doing a flush. I know it isn't the top one. I would guess one, or either, of the middle ones.

Fwiw, I've always just done a drain-n-fill each 30k mi. There's an 11mm drain plug on the tranny bottom just inside the lf tire. Place a 6qt.+ drain pan under and remove the plug. Refill with 5-6qts. of Dexron 6 atf through the dipstick/cable tube underhood.

 

[Big Buford]

Drain and fill is preferable to flush for the tranny.....

 

[StImpala00]

Fwiw, I've always just done a drain-n-fill each 30k mi. There's an 11mm drain plug on the tranny bottom just inside the lf tire. Place a 6qt.+ drain pan under and remove the plug. Refill with 5-6qts. of Dexron 6 atf through the dipstick/cable tube underhood.

Drain and fill indeed. And then add a bottle of BG ATC.