SERVICE MANUAL UPDATE-SEC. 7A AUTOMATIC TCM REPLACEMENT

SUBJECT: AUTOMATIC TRANSAXLE CONTROL MODULE (TCM) REPLACEMENT

MODEL and YEAR: 1989-91 GEO METRO

This bulletin is an amendment to Section 7A of the 1989-91 Geo Metro Service Manuals (ST370-89, ST370-90 and ST370-91 respectively). Refer to this bulletin for information concerning Transaxle Control Module (TCM) replacement procedures on 1989-91 Geo Metro vehicles equipped with automatic transaxles.

On-Vehicle Service

Transaxle Control Module (TCM)

Remove or Disconnect

1. Negative (-) battery cable.

2. Two electrical connectors from TCM.

3. Two bolts and TCM from underneath right side of steering column (Figure 1).

Install or Connect

1. TCM underneath right side of steering column; secure with two bolts (Figure 1).

Tighten

* TCM bolts to 15 N.m (11 lb.ft.).

2. Two electrical connectors to TCM.

3. Negative (-) battery cable.

Tighten

*Negative (-) battery cable-to-negative (-) battery terminal retainer to 15 N.m (1 I lb.ft.).

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.