GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Optra 🢒 Transmission/Transaxle 🢒 Automatic Transmission - ZF 4HP 16 🢒 Automatic Transmission Electronic Component Views
Figure 1:

Transmission Control Module (TCM)
Object Number: 1480994 Size: MF
(1)Transmission Control Module (TCM) ZF 4HP16
(2)Key Interlock Module
Figure 2:

Hold Mode Switch (MLQ, MFA)
Object Number: 1480992 Size: MF
(1)Shift Program Switch (Hold Mode)