100k differential maintenance question

[BlueCollarTahoe]

What is your rpo code?

where can i find that?

 

[MCAT069]

where can i find that?

Look in your glove compartment. You can also send a message to @GM Customer Service and request a build sheet for free.

 

[BlueCollarTahoe]

 

[BlueCollarTahoe]

RPO sticker looks like a foreign language to me. any help?

 

[mals]

View attachment 184476

This is the site that I used to decode all the RPOs for my Yukon.

http://www.cadillacfaq.com/rpo/

Don't worry that it's a Cadillac website, it searches the entire GM RPO database.

 

[swathdiver]

NR4 is the RPO code for your transfer case. As mentioned earlier, it's a Borg-Warner and is the 4482 model and it takes 1-1/2 quarts of Dexron III.

 

[BlueCollarTahoe]

thanks for the info guys. appriciate it. does it say on the RPO code what size differential cover this truck has? gonna order some new ones to put on when i change the fluids. want to get the right size.

 

[BlueCollarTahoe]

Update: did the front diff, the transfer case, and the rear diff with a diff cover switch out. running Mobil1 synthetic in everything. now heres the question for the last part of this 100k maintenance. my transmission fluid is pink. the manual says to do a filter replace and change. ive come to realize this is jsut replacement of what is lost when you change the filter. 5 to 6 quarts. i was gonna go Mobil1 there too but if its not a complete flush and replacement i figured im just adding to whats in there. not sure what was put in there before neither. was thinking of going with :
Castrol 03518 Transmax ATF High Mileage Transmission Fluid

anyone use this stuff? good for this replacement? 04 tahoe AWD.

 

[BlueCollarTahoe]

bump

 

[BlueCollarTahoe]

bump for advice. trying to order and do this week.