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Speedometer Head: Customer Interest
Speedometer - Inoperative

NUMBER: 93-T-31
CORP.REF.NO: 238118R
DATE: January 1993
SECTION: 8A

SUBJECT:
INOPERATIVE SPEEDOMETER
-

INSERT INSULATOR IN CONNECTOR

MODELS/YEARS:
1993 CUTLASS CIERA WITHOUT CRUISE CONTROL

CONDITION:
On very early 1993 Cutlass Ciera models built without cruise control, the speedometer may be inoperative.

CAUSE:
The connector for the cruise control module is taped to the harness on cars built without cruise control. If there is nothing to separate the terminals in the
connector, the terminals may touch, shorting out the Vehicle Speed Sensor (VSS) signal to the cluster.

Early built vehicles may have nothing in the connector, or may have a small piece of clear plastic, which should be replaced with the insulator. The
insulator was added shortly after start of production, and there were very few vehicles built with this condition.

CORRECTION:
1.

Remove left-hand sound insulator panel.

2.

Insert an insulator P/N 12064999, which is currently available from GMSPO, into the cruise control module connector, as shown in the
illustration.

3.

Reinstall left-hand sound insulator panel.

WARRANTY INFORMATION:
Labor Operation: N6170                    
Labor Time: Use applicable time

All Technical Service Bulletins for Speedometer Head: > < Parking Brake Warning Switch|Locations