POOR RADIO RECEPTION NOISE/ST (REPL. RADIO ANTENNA CAB & BD)

SUBJECT: POOR RADIO RECEPTION NOISE/STATIC (REPLACE RADIO ANTENNA CABLE AND BODY ASSEMBLY)

MODELS: 1988-93 C/K 1,2,3

CONDITION

Owners of some 1988-93 C/K trucks may comment about poor radio reception or static.

CAUSE

Water intrusion through the antenna base. The sealing compound contained in the antenna base may separate thus allowing water to enter the antenna base and from there migrate along the antenna cable. Usually, the separation cannot be seen by a visual inspection.

CORRECTION

Uncouple the connection where the antenna cable and antenna cable extension meet (Figure 1). Check for the presence of moisture, corrosion, or other signs of water intrusion. If there is any sign of moisture at the connector, replace the antenna cable (P/N 15573236) and body assembly (P/N 15963441). If water intrusion is present, it will also be necessary to replace the antenna extension cable between the antenna body terminal and radio receiver. (See Figures 1 and 2.)

Vehicles built after the following VIN breakpoints are equipped with the new antenna base:

Plant Div. VIN ----- ---- --- Oshawa GMC P1548022 Ft. Wayne GMC PZ540062 Janesville GMC PJ740881 Pontiac East GMC PE562927

SERVICE PARTS INFORMATION

Part Number Description Quantity ------ ----------- -------- 15963441 Antenna Cable and Body 1 Assembly 15573236 Antenna Cable Extension 1

Parts are currently available from GMSPO.

WARRANTY INFORMATION

For vehicles repaired under warranty, use:

Labor Op Description Labor Time -------- ----------- ---------- R0240 Replace Antenna See Applicable Cable and Body Labor Time Guide Assembly

R0260 Replace Antenna See Applicable Extension Cable Labor Time Guide

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.