I recently purchased a retired 2017 police silverado with a bad transmission. Currently at the shop and they just called me to let me know the initial estimate might not be acurate as the unit could not be rebuild and is was a 6l90 and not the more common 6l80. The label on the side of the has the following code. 5CKA which according to the info on the forum the C means its an 80 not a 90. How else can I verify whats the correct transmission. According to the title it is a 2500 series but it has a 5.3 and only six lugs so this option of "2500" might be only offered offered here in Mexico where I am located. So it is possible a transmission is too damaged to be rebuild and how do I identify it.
andoni95
6l80 or 6l90
I recently purchased a retired 2017 police silverado with a bad transmission. Currently at the shop and they just called me to let me know the initial estimate might not be acurate as the unit could not be rebuild and is was a 6l90 and not the more common 6l80. The label on the side of the has the following code. 5CKA which according to the info on the forum the C means its an 80 not a 90. How else can I verify whats the correct transmission. According to the title it is a 2500 series but it has a 5.3 and only six lugs so this option of "2500" might be only offered offered here in Mexico where I am located. So it is possible a transmission is too damaged to be rebuild and how do I identify it.
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Police versions can sometimes be built with different configurations.
Check your RPO code sticker in your glovebox. 6L90 is MYD.
You could also email your VIN to socialmedia@gm.com and ask them for a build sheet. That should list all the RPO codes for your truck and you should be able to decipher which trans you actually have. (Unless it was already replaced by a previous owner with a different trans.)
Check your RPO code sticker in your glovebox. 6L90 is MYD.
You could also email your VIN to socialmedia@gm.com and ask them for a build sheet. That should list all the RPO codes for your truck and you should be able to decipher which trans you actually have. (Unless it was already replaced by a previous owner with a different trans.)
There are some odd combos south of the border, so who knows what the case may actually be.
But if you look at the output shaft of the trans and count the splines, the 6l90 will be a larger, 34 spline shaft vs the smaller 32 spline shaft the 6l80 has.
The 6l90 is also longer. But not having the other to compare to, you can't really go off that.
However, based off that tag that's on the trans, that's a 6l80.
C is the 6l80 and a D is 6l90 (second letter in the 4 digit code).
But if you look at the output shaft of the trans and count the splines, the 6l90 will be a larger, 34 spline shaft vs the smaller 32 spline shaft the 6l80 has.
The 6l90 is also longer. But not having the other to compare to, you can't really go off that.
However, based off that tag that's on the trans, that's a 6l80.
C is the 6l80 and a D is 6l90 (second letter in the 4 digit code).
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