IMPROVED TEMPERATURE GAUGE FOR DIESEL I/P CLUSTERS

CORPORATE ID: 159401

9018T FEBRUARY 1991

SUBJECT: IMPROVED TEMPERATURE GAGE FOR THE 1991 P TRUCK DIESEL CLUSTERS.

CLUSTERS AFFECTED: 16138155, 16138165, 16138175

TO IMPROVE THE ACCURACY OF THE TEMPERATURE GAGE ON THE ABOVE CLUSTERS, THE APPLIQUE AND COIL + CASE ASSEMBLY HAVE BEEN CHANGED. THE FOLLOWING PROCEDURE SHOULD BE PERFORMED ON ALL EXCHANGE UNITS CURRENTLY IN INVENTORY AND ALL UNITS RETURNED FOR REPAIR.

CHANGE THE APPLIQUE AND COIL AND CASE ASSEMBLY ACCORDING TO THE CHART BELOW. ONCE THIS IS DONE THE CLUSTER TAKES ON A NEW PART NUMBER, AND SHOULD BE SO MARKED ON THE CLUSTER LABEL WITH A PERMANENT BLACK MARKER.

OLD PART NUMBER NEW PART NUMBER DESCRIPTION

25081289 16161279 APPLIQUE (MK) 25081290 16161280 APPLIQUE (KM/K) 25034667 25034668 COIL + CASE ASM (ALL 3) 16138155 16161305 CLUSTER (MK) 16138165 16161295 CLUSTER (KM) 16138175 16161285 CLUSTER (K)

YOU WILL RECEIVE AN ADDITIONAL .1 HOUR WHEN AN OLD CLUSTER IS UPDATED TO THE NEW ON AN IN WARRANTY CLUSTER. WHEN FILLING OUT THE AC-DELCO 1078 FORM, PUT "X" IN THE LABOR CODE COLUMN AND PUT "9018T" IN THE MODEL NUMBER COLUMN. 91-GMC-P-02

DE PROPRIETARY COPYRIGHT 1991 DELCO ELECTRONICS CORPORATION. ALL RIGHTS RESERVED.

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.