Which transfer case do I have in my 2003 Yukon Denali XL?

[dougmorgan7435]

I started hearing a bearing whine in my left front wheel on my newly purchased 2003 Yukon Denali XL...turns out the drivers side output shaft seal is pouring. Quick check at Autozone.com tells me I could have several different transfer cases , How do I tell which one I have? Thanks

 

[S33k3r]

Should be a disk on the transfer case that should tell you. This one is from my Daughter's 2003 Sierra Denali.


That's an NP149.

The third picture on this page gives an idea as to where to find the disk:

I finally found a NP149 transfer case

 

[swathdiver]

Output shaft has nothing to do with the transfer case unless I'm reading this wrong.

You have an 8.25" front differential. There are two kinds however.

Show us a picture of your buttons or look for the "N" codes on your RPO sheet in the glovebox.

 

[S33k3r]

Output shaft has nothing to do with the transfer case unless I'm reading this wrong.

You have an 8.25" front differential. There are two kinds however.

Show us a picture of your buttons or look for the "N" codes on your RPO sheet in the glovebox.

I believe he is describing the front axle. That's why I gave the advice I did.

 

[adventurenali92]

Output shaft has nothing to do with the transfer case unless I'm reading this wrong.

You have an 8.25" front differential. There are two kinds however.

Show us a picture of your buttons or look for the "N" codes on your RPO sheet in the glovebox.

If he has a 2003 xl Denali I’m guessing it’s an AWD, and he won’t have any buttons on the dash for transfer case.

 

[swathdiver]

I believe he is describing the front axle. That's why I gave the advice I did.

I gotcha, as I was writing my understanding of what was needed became more clear and my intent was to expound on what you wrote.

 

[S33k3r]

I gotcha, as I was writing my understanding of what was needed became more clear and my intent was to expound on what you wrote.

Thanks. I try to be nice when I'm typing those responses; then I come back later and realize they might not come across as nice... At least you guys know I'm not intentionally a dick.

 

[rockola1971]

I started hearing a bearing whine in my left front wheel on my newly purchased 2003 Yukon Denali XL...turns out the drivers side output shaft seal is pouring. Quick check at Autozone.com tells me I could have several different transfer cases , How do I tell which one I have? Thanks

Have a look on your RPO sticker under the "N's" which is where the code for your transfer case is. It will be a NP3 or a NR4. You should have a AWD Borg Warner TCase.