I am working on a 2002 Trailblazer and have the following values (for 2Hi, A4WD, 4Hi, 4Lo):

ENCODR SUPP 3.37v 3.37 3.39 3.39

ENCODR RTN 2.65 3.20 3.96 0.71

MODE SW RTN 4.08 3.25 2.41 1.58

Not sure if that helps. This vehicle was stuck in 4Lo, but it "r... Login to read more.