Temperature Gauge - Fluctuation

NUMBER: 93-T-87

CORP.REF.NO: 338307

DATE: September 1993

SECTION: 6B, 8A

SUBJECT:
INFORMATION ON TEMPERATURE GAUGE FLUCTUATION

MODEL/YEARS:
1988-91 CUTLASS CALAIS AND 1992-93
ACHIEVA WITH 4 CYLINDER ENGINES

This bulletin cancels and supersedes the article written in the July 1988 Service Guild page 95, which should be disregarded.

Some 1988-91 Cutlass Calais and 1992-93 Achieva equipped with 4 cylinder engines may exhibit a condition where temperature gauge readings fluctuate in the normal range. These gauge fluctuations may be as much as 1/4 of the scale.

Coolant temperature sensor location combined with the thermostat cycling characteristics contribute to this sensitivity. This condition is considered a normal characteristic of this engine family and should not be cause for instrument panel cluster, gauge or indicator sender, or engine coolant thermostat replacement.