2003 Chevy Avalanche diferencial trasero diagrama

SOURCE: 2003 CHEVY AVALANCHE dash board telling me left

check the lil switch that'll be located on the latch anchor point or within a few inches of it.... odd is the switch is faulty

SOURCE: Where is oil sending unit on 2003 Chevy Avalanche

It's at the very back of the block, top-center, under the intake manifold.

SOURCE: My chevy avalanche aircon blower

Sounds like a blower motor resistor. Not an expensive part, fairly easy for a mechanic to change. Located usually behind the glove box door.