Reduced Engine Power Message With DTCS - TAC Module (87-65-16)

Publication date: 1998-04-01
Reference number: 87-65-16

REDUCED ENGINE POWER MESSAGE WITH DTCS - TAC MODULE

TECHNICAL SERVICE BULLETIN

Reference Number(s): 87-65-16, Date of Issue: April, 1998

REDUCED ENGINE POWER MESSAGE ALONG WITH PARTICULAR POWERTRAIN TROUBLE CODES (INSTALL NEW TAC-MODULE IF STRATEGY BASED DIAGNOSTICS IN SERVICE MANUAL FAILS)

Model(s): 1997-98 Chevrolet Corvette

Section: 6E - Engine Fuel & Emission

Bulletin No.: 87-65-16

Date: April, 1998

VEHICLES AFFECTED

1997-98 Chevrolet Corvette with 5.7L V8 engine (VIN G - RPO LS1).

CONDITION #1

Intermittent reduced engine power event, accompanied by P-1516, or P1518 trouble codes.

NOTE: If a situation arises where a P-1516 trouble code is accompanied by a P-1120 and/or P-1220 trouble code, this service bulletin does not apply. In these cases the technician must use the normal Strategy based diagnostic.

CONDITION #2

Intermittent reduced engine power accompanied by trouble code P-1125 and any of the following trouble codes:

P-1276

P-1281

P-1286

CAUSE

Condition may be due to diagnostic software and calibration in the TAC-Module were not optimally utilized.

CORRECTION

If the above conditions cannot be corrected using the normal strategy based diagnostics listed in the Service Manual, install the new TAC-Module listed below:

PARTS INFORMATION

Parts are currently available from GMSPO.

PARTS INFORMATION

Part Number	Description
25319443	New TAC-Module

WARRANTY INFORMATION

For vehicles repaired under warranty, use:

Labor Operation No.: J-5582

Labor Time: 0.5 hr.