EXPERTEC TSB (91-6-39)

Publication date: 1991-05-03
Reference number: 91-6-39

EXPERTEC TSB

TECHNICAL SERVICE BULLETIN

Reference Number(s): 91-6-39, Date of Issue: 05/03/91

COLD/WARM ENG.DRIVEABILITY - CHANGES - NEW MEMCAL

Model(s): 1990-91 Pontiac LeMans with 1.6L Engine

Bulletin No.: Pontiac 91-6-39

Date: 05/03/1991

SERVICE INFORMATION

A production running change was made to release a new ECM (Electronic Control Module) to address Cold/Warm Engine Driveability Conditions. If a customer comments about these conditions and the vehicle was built prior to the following VIN breakpoints the conditions may be corrected with a new service calibration Memcal available from GMSPO according to the chart below:

Installation of the new Memcal should be according to the service procedure in the 1991 LeMans Service Manual.

NEW MEMCAL SERVICE

Trans Emis.	Old ECM P/N	Old B.C.Code	New ECM P/N	New B.C.Code	New MEMCAL P/N	Scanner ID	VIN B/P
M/T FED.	16139549	ASFL	16159509	AXCC	16160757	9509	MB319634
A/T FED.	16139539	ASFK	16159529	AXCF	16160767	9529	MB317305
A/T CALIF.	16139559	ASFM	16160739	AXJL	16160882	0739	MB322908
M/T CALIF.	16134189	ARAW	16159519	AXCD	16160762	9519	MB322907

Parts are expected to be available on May 27, 1991. Until then normal part orders will not be accepted by GMSPO. only verifiable emergency VIP orders will be accepted. SPO will make every effort to obtain parts. All parts will be placed on 400 control to waive VIP surcharges. However, the part will be shipped premium transportation at dealer's expense. All other order types will be cancelled as incorrectly ordered while the 400 control is in place.

WARRANTY INFORMATION

Labor Operation Number: J 6364

Labor Time : 0.7 Hours