Bulletin No.: PI0793A
Date: Oct-2012

Subject:

AM Radio Reception Quality Poor

Models:

2013 Chevrolet Corvette Convertible

This PI is being revised to update steps 7 and 14. Please discard PI0793.

Condition/Concern
Some customers may comment on poor AM radio reception.
Note: Corvettes are produced with mostly SMC panels, which are not generally good conductors, so Corvettes will receive less AM radio stations than steel
bodied vehicles and convertibles have less AM radio reception than coupes.

Recommendation/Instructions
Reroute the AM antenna, install a ground harness and reroute the generator battery feed terminal harness.
Moving the AM antenna will increase AM reception and adding the ground harness will reduce some of the static the radio is picking up.
Rerouting the generator battery feed terminal harness will also to contribute to improved AM reception.

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1.

Assemble a 1460.50 mm (57.5 in) with a 254 mm (10 in) jumper ground harness with a .01 microfarad capacitor and spade terminals attached.
Important: The length of the ground harness wire must be 1460.50 mm (57.5 in).
1.1. Obtain bulk 18 gauge wire and cut to length of 1460.50 mm (57.5 in) and 254 mm (10 in)
1.2. Obtain one .01 microfarad capacitor.
1.3. Obtain three spade terminals – (2) 12-10AWG terminals and (1) 22-18AWG terminal.
1.4. Cut the 1460.50 mm (57.5 in) wire at 127 mm (5 in). Solder the capacitor in between the wire leads and shrink wrap capacitor.
1.5. On the closest end to the capacitor, crimp the 254 mm (10 in) wire to the 1460.50 mm (57.5 in) wire with the 22-18AWG terminal.
1.6. Crimp the other two terminals on the ends of the wires.

2.

Remove the rear center carpet panel.

3.

Attach the spade terminal connector to the lower mounting stud of the antenna module.

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4.

Route the wire along the rear of the trunk and up towards the driver side actuator.

5.

Attach the spade terminal connector to the grounding screw (T-10 torx) near the front of the actuator.

6.

Run the second wire towards the rear of the actuator.

7.

Attach the second spade terminal connector to the actuator mounting bracket stud. To avoid additional static issues, ensure the spade terminal
connector is fully seated on the actuator.

8.

Remove the driver side tail lamp.

9.

Gently pull the yellow antenna lead from its original position along the rear driver’s side quarter panel and pull through the tail lamp opening. The yellow
antenna lead is held in place with tape patches and some resistance when pulling is normal.
Note: If the antenna does not pull free, it may be necessary to loosen the fuel filler pipe housing to free the antenna. If this is the case, use OLH (Other
Labor Hours).

10. Feed the antenna through the rear bumper fascia opening shown (1).

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11. Loosen the rear bumper fascia screws and place the antenna underneath the fascia (1).
12. Tighten the rear bumper fascia screws.
13. Install the rear center carpet panel.
14. Observe the routing of the generator battery feed terminal harness. If it is routed under the generator, re-route the harness above the generator. Refer
to the illustrations below.

Parts Information
Part Number

Description

Material Allowance

Quantity

Obtain Locally

.01 Microfarad Capacitor (400WVDC Max)

$1.50

1

4

Obtain Locally

Spade Terminal 22-18AWG

$0.60

2

Obtain Locally

Spade Terminal 12-10AWG

$0.10

1

Obtain Locally

18 gauge bulk wire

$1.00

1714.50 mm (67.5 in)

Warranty Information
For vehicles repaired under warranty, use:
Labor Operation

Description

Labor Time

N9693*

Install Ground Harness and Relocate Antenna

0.8 hr

*This is a unique labor operation for bulletin use only. It will not be published in the Labor Time Guide.

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these 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 your GM dealer for information on whether your vehicle may benefit from the information.

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