HIGHWAY CHUGGLE AND SPARK KNOCK CONCERNS

HIGHWAY CHUGGLE AND SPARK KNOCK CONCERNS

MODELS AFFECTED: 1987 SKYHAWKS WITH 2.OL OHC ENGINES (VIN CODE K) ----------------

Customers comments that identify a highway low-speed chuggle or spark knock concern may be repaired with the following changes.

o Intake Manifold Drop-Tube Kit Part Number 10106050

o EGR Valve:

Automatic Transmission Part Number 17112004 Manual Transmission Part Number 17112005

o PROM Package:

NEW I. D. NEW Transmission PROM P/N (SCAN TOOL) Broadcast Code ------------ -------- ----------- -------------- Automatic 16129056 9092 ANXH Manual 16129057 9072 ANXD

Parts are currently available from GMSPO.

If driveability conditions still continue after the above changes, refer to Service Manual Section 6E2-B for further directions.

WARRANTY INFORMATION

Labor Operation Number: T1384 Labor Time: .9 Hours Trouble Code: 92

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.