As the title states, I am looking to swap my fluids in my 04 Sierra's transfer case, transmission, and front and rear ends. My question is I have the push-button shift for 4WD. Is this the Autotrac system? If so, do I need to use GM's Autotrac II fluid, or is their something else I can use (preferably AMSOIL ATF)?
2004 GMC Sierra fluid swap
- Thread starter Compman1988
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I would only use Autotrac fluid. For a few $$ it's not worth taking a change.
You can use Amsoil ATF or ATD for the NVG 263-NP1.
Pablo, IIRC, the Amsoil website does not have a recommendation for this particular transfer case set-up and therefore recommends the factory Autotrak II. I believe it is confusing because there are about 4 options listed, some can use ATF while this one does not. This is the same transfer-case in my truck and I remember double and triple-checking to make sure I had to use the AutoTrak II fluid, which is what I used. The previous owner had ATF in it (or the dealership put it in) with no apparent ill effects but I'd rather use what is required by the manufacturer or a known accepted subsitute. I just don't know if Autotrak II is the same as ATF but I've heard its not.
If you have information that confirms that ATF can be used in the push-button selectable 4WD transfer cases for late model GM trucks and SUV's, please post it. I would prefer to use Amsoil's synthetic ATF if I knew it was better for my transfer case. At this point, I just don't feel confident about it.
If you have information that confirms that ATF can be used in the push-button selectable 4WD transfer cases for late model GM trucks and SUV's, please post it. I would prefer to use Amsoil's synthetic ATF if I knew it was better for my transfer case. At this point, I just don't feel confident about it.
To be honest, I never looked I just went by the owner's manual and the Amsoil website. Looking at the Amsoil site now it listed only 2 options (could have sworn it listed 4 in the past). One option is a manual transfer case (TRC) and they recommend ATF. The other option is:
Transfer Case,NV Electronic.....SLF[5]: 5. SLF is GM part no. 12378508 (U.S.), 10953626 (CAN).
So, at least for my year/make/model, even Amsoil says to use GM PN 12378508, which I assume is Autotrak II.
Transfer Case,NV Electronic.....SLF[5]: 5. SLF is GM part no. 12378508 (U.S.), 10953626 (CAN).
So, at least for my year/make/model, even Amsoil says to use GM PN 12378508, which I assume is Autotrak II.
OK - what year, engine and exact model is your Sierra?
Check out MY 2004.
Amsoil ATF or ATD for the NVG 263-NP1.
Transfer Case,NVG 246-NP8 is SLF GM part no. 12378508 (U.S.), 10953626 (CAN).
Check out MY 2004.
Amsoil ATF or ATD for the NVG 263-NP1.
Transfer Case,NVG 246-NP8 is SLF GM part no. 12378508 (U.S.), 10953626 (CAN).
Its not a Sierra, its a 2001 Chev Suburban, same drivetrain as the Sierra. On the 2004 Sierras I notice there are also two recommendations (as you've noted above). The NP8 RPO code is for a push button control transfer case while the NP1 RPO code is w/o the push button. So, for Compman1988's vehicle, I believe the recommendation is to use AutoTrak II, per both GMC and Amsoil.
So the NP8 is the electronic control (push button) unit. Indeed, Amsoil recommends the GM SLF (AutoTrak II) fluid for the NP8 as I noted.
Thank you all for the replies. I see I'll have to use GM's Auto-Trak II fluid until someone make a substitute. Pablo, do you know if Amsoil is in the process of doing this by any chance?
That's why I posted the New Venture model number. If the case is a NVG 263-NP1, then yes.
What is the model # of yours?
What is the model # of yours?
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