can this substitute for Automatic Transfer Case Fluid (GM Part No. 12378396)

auto trak 2 is slicker. It came about because the clutches in the transfer case were grabbing & causing a chatter. I've never heard of anyone having a problem using the auto trak 2 fluid instead of the auto trak fluid. I hope that helps you.

Is all ac delco auto track 2 fluid the same this part number doesn’t match my owners Manual ?

This is the correct fluid to use if and only if you have “full time” or automatic ALL WHEEL drive. It is NOT for four wheel drive, which mechanically is a totally different system, even though the result is similar- getting up a snow covered hill. I used this in my 2000 Olds Bravada. Fluid I drained looked dirtier, but the same blue. I believe that GM changed the part number, or updated the old fluid about 12 or 15 years ago. Like you, I did extensive online research before proving to myself that This Is the correct fluid to use for “automatic” All wheel drive before buying it.

Will this work in a 2007.5 lmm duramax?

It should work in the transfer case but I'd call the dealer parts department to be sure. My truck is a 1500. The transfer case in your Duramax may be a different unit requiring a different fluid.

Is this for the 2003 Silverado with 4 wheel buttons?

I used it in a 2004 Avalanche 1500 with push button 4WD and it made the service 4wd light stop. I decided to spend the extra to get this blue AC Delco fluid instead of a different brand the local part store offers

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🛠️ Keep your drive sharp with ACDelco’s Auto-Trak II – because your ride deserves the best!

AC DELCO OEM QUALITY - Trusted by professionals, ensuring peak performance and durability.
LIGHTWEIGHT COMPACT - 890g and compact dimensions make storage and handling effortless.
OPTIMAL 33 8 OZ VOLUME - Perfectly sized to keep your transfer case running smooth without waste.
EASY APPLICATION PACKAGING - Ergonomic bottle design for mess-free, hassle-free fluid changes.
PRECISION TRANSFER CASE PROTECTION - Formulated to reduce wear and extend drivetrain life under all conditions.

ACDelco 10-4017 Auto-Trak II Transfer Case Fluid is a 33.8 oz premium lubricant designed specifically for transfer cases. Engineered to OEM standards, it ensures optimal protection and longevity of your drivetrain components. Packaged in a compact, easy-to-handle bottle weighing 890 grams, this fluid is a must-have for maintaining smooth, reliable 4WD performance.

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Manufacturer	ACDelco
Brand	ACDelco
Product Dimensions	22.35 x 12.19 x 6.35 cm; 907.18 g
Item model number	10-4017
Manufacturer part number	10-4017
OEM Part Number	88900402
Item Weight	907 g

ACDelco 10-4017 Auto-Trak II Transfer Case Fluid - 33.8 oz by ACDelco

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