What type of differential fluid does the 2004 chevy avalanche use?

The 2004Chevrolet Avalanche requires different weights of gear oil in the front and the rear, and it's important that You feed it with such. It's also important to know which differential You have, as this can affect oil type and capacity. The S4WD GL-5 requireS3.0 pints of 80W-90 in the front differential. The 9.25 RG SL136 requires slightly more, 3.6 pints, and takeS75W-90. As for the rear differential, You'll always use 75W-90, but Your capacity will vary. The 10.5RG SL136 needS5.5 pints, the 8.6 RG SL136 requireS4.2 pints, and the 9.5 RG SL136 takeS5.5 pints. If You're unsure which differentials You're working with, the information can be found on the VIN sticker on the front driver's side door jamb.