75W-90 in the rear differential. 80W-90 in the front differential (4x4 models). This is according to the 2007 Chevrolet Suburban owner's manual.
The 2007 Chevrolet Suburban has a 4-speed automatic.
The 2007 Chevrolet Suburban runs on regular unleaded.
80-90 PL-5 gear oil
75W-90
75w140 synthetic
You must use-- DEXRON III Trans. fluid
SAE 75W90 synthetic gear oil
Dextron II fluid.
VTM-4 available from Honda only
80w90...with a diff additive for the rear
75w140 synthetic with limited slip additive.
Valvoline Synthetic Transmission Fluid