Seville V8-273 4.5L (1989)
Clock: All Technical Service Bulletins
Instruments - Clock Gains or Loses Time Intermittently
Bulletin No.
T-89-103A
File in Group
8
Number
101
Corp. Ref. No.
718101R
Date
May, 1989
SUBJECT:
CLOCK GAINS OR LOSES TIME INTERMITTENTLY
MODELS AFFECTED:
1988-1989 ELDORADOS AND SEVILLES
This bulletin supersedes bulletin dated 5/89, which should be discarded. The PROM I.D. numbers for the old 1989 PROM's were incorrect.
Clocks on some 1988-1989 Eldorados and Sevilles may gain or lose time intermittently. The amount of time may vary from a few minutes to several
hours.
IMPORTANT:
A normally operating clock may lose or gain up to two minutes per month.
To repair this condition check the PROM I.D. and install the appropriate new PROM using the following procedure:
1.
Determine the amount of time gained or lost. If it is less than two minutes over a one-month period, the clock is operating properly.
2.
Determine whether the trip odometer or climate control setting is affected, or if a BCM code B552 is set. If so, refer to the Service Information
Manual for BCM power and ground diagnosis.
3.
Check PROM I.D. (BD99). Refer to Section 8D of the Service Information Manual.
4.
If the PROM I.D. is: 1988 - 0186 or 8256 1989 - 3776 or 3426
Replace the EPROM with:
1988 - P/N 16139065 PROM I.D. 9066 1989 - P/N 16138881 PROM I.D. 8766
5 .
If the PROM I.D. is not:
1988 - 0186 or 8256
1989 - 3776 or 3426
Refer to the Service Information Manual for BCM power and ground diagnosis.
All parts are currently available from GMSPO.
