Lumina APV V6-191 3.1L (1990)
PROM - Programmable Read Only Memory: Customer Interest
PROM - Low Speeds Shudder or Vibration
Number: 92-24-6E
Section: 6E
Date: OCT. 1991
Corporate Bulletin No.: 136506R
ASE No.: A8
Subject:
SHUDDER OR VIBRATION AT LOW SPEEDS
Model and Year:
1990-92 LUMINA (APV) WITH 3.1L ENGINE
THIS BULLETIN CANCELS AND SUPERSEDES DEALER SERVICE BULLETIN 91-380-6E, DATED 08/91. THE 1992 MODEL YEARS HAS
BEEN ADDED. ALL COPIES OF 91-380-6E SHOULD BE DISCARDED.
Condition:
Some owners of 1990 - 1992 U-vans with 3.1L (VIN D) engine may comment of a Shudder or Vibration at Low Speeds.
Cause:
This condition may be caused by the transmission converter clutch being engaged at 23 MPH.
Correction:
If normal diagnostic procedures shown in your Service Manual (Section 6E2-B-3) do not correct this condition, a new PROM with a "
TCC" (torque converter clutch) engagement speed of 35 MPH is available. The part numbers are as follows:
1990 Vehicles
Emission
PROM
Scanner
Broadcast
System
Package No.
I.D.
Code
California
16163425
3431
AYAC
Federal
16163426
3441
AYAD
1991 and 1992 Vehicles
California
16164894
4911
AYHP
Federal
16164893
4901
AYHN
Note:
This correction will have no impact on performance above 35 MPH.
Parts are currently available from GMSPO.
Labor Operation Number:
T0500
Labor Time:
.7 Hour
