Axle, rear, 3.90 ratio

Years 1999–01 Models 1 Factory citations 3

Documented applications

Catera — V-body (1997–2001)

1999–2001 Factory-verified

the 1999 list words it as the transaxle final drive 3.90 ratio

GM factory document — 1999 cadillac catera rpo code list, p.1.
GM factory document — 2000 cadillac catera rpo code list, p.1.
GM factory document — 2001 cadillac catera rpo code list, p.1.

This page aggregates every documented appearance of GU8 in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.