ENGINE STALL WHEN VEHICLE IS PLACED IN GEAR (REPLACE PROM)

MODELS AFFECTED: 1990 DE VILLES, FLEETWOODS, 60 SPECIALS, ELDORADOS, AND SEVILLES WITH 4.5L, VIN 3

This bulletin is being revised to correct the service part usage for the Seville STS. Service Bulletin T-90-2 should be discarded.

Early production 1990 DeVilles, Fleetwoods, 60 Specials (built before VIN breakpoint 217229 for Federal emissions and 217586 for California emissions), Eldorados (built before VIN breakpoint 600811 for Federal emissions and 600776 for California emissions), and Sevilles (built before VIN breakpoint 801006 for Federal emissions and 800776 for California emissions) may experience an engine stall when placed in gear immediately after a cold start. This condition is caused by an improper PROM calibration in the MEM-CAL unit.

To identify the improperly calibrated PROM enter diagnostics, select ECM data, parameter ED99 PROM I.D. for Eldorados and Sevilles and parameter E.2.5 for DeVilles, Fleetwoods, and 60 Specials. Check the parameter display against the PROM I.D. in the chart listed below. If application and PROM I.D. match, install the new service MEM-CAL listed in the chart to correct the stalling condition. NEW NEW NEW PROM Broadcast Service PROM Broadcast Carline I.D. Code MEM-CAL I.D. Code ------- ---- ---- ------- ---- ---- DeVille, Fleetwood - Fed 357 ATNR 16147006 360 ATTT DeVille, Fleetwood - Cal 353 ATNL 16146990 359 ATTN 60 Special - Cal 354 ATNM 16146994 361 ATTP 60 Special/Comm. - Fed* 355 ATNN 16146998 362 ATTR Eldorado, Seville - Fed 1012 ATNP 16147002 1020 ATTS Eldorado, Seville - Cal 1013 ATNJ 16146980 1018 ATTL Seville STS - Fed/Cal 1014 ATNH 16146975 1017 ATTK

*Commercial chassis is a 50 state emission calibration.

Parts are currently available from GMSPO. Removal and installation procedures are located in Section 6E-C1 of the Service Information Manual.

WARRANTY INFORMATION VEHICLE SERIES Operation Operation Description Number C D E J K V

MEMM-CAL Replace T6395 .5 .5 .5

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.