Where Does The Antenna Wiring Run?

[jrrod2004]

Service Information

 

2008 GMC Truck Sierra - 2WD | Sierra, Silverado (VIN C/K) Service Manual | Document ID: 1838423 Radio Replacement (with RPO SLT)

 

Callout

 

Component Name

 

 

Preliminary Procedures

1. Remove the accessory switch assembly. Refer to Accessory Switch Replacement .
   
2. Remove the HVAC control module. Refer to HVAC Control Module Replacement or HVAC Control Module Replacement .
   

1

 

Radio Screw (Qty: 4)

 

Notice: Refer to Fastener Notice in the Preface section.

 

Tighten

2 N·m (18 lb in)

 

2

 

Radio Assembly

 

Tip

 

 

• Use a scan tool to retrieve the radio part number before removing the radio from the vehicle.

 

 

• Disconnect the electrical connector.

 

 

• Disconnect the antenna cable.

 

 

• Reprogram the radio after replacement. Refer to

Control Module References .

 

© 2008 General Motors Corporation. All rights reserved.

[jrrod2004]

Service Information

 

2008 GMC Truck Sierra - 2WD | Sierra, Silverado (VIN C/K) Service Manual | Document ID: 1834987 Accessory Switch Replacement (with RPO SLT)

 

Callout

 

Component Name

 

1

 

Instrument Panel Accessory Trim Plate

 

Refer to Instrument Panel Accessory Trim Plate Replacement .

 

2

 

Instrument Panel Accessory Switch Screws (Qty: 2)

 

Notice: Refer to Fastener Notice in the Preface section.

 

Tighten

2 N·m (18 lb in)

 

3

 

Instrument Panel Accessory Switch Assembly

 

Tip

Disconnect the electrical connections.

 

© 2008 General Motors Corporation. All rights reserved.

[jrrod2004]

Service Information

 

2008 GMC Truck Sierra - 2WD | Sierra, Silverado (VIN C/K) Service Manual | Document ID: 1833054 Instrument Panel Accessory Trim Plate Replacement (with RPO SLT)

 

Callout

 

Component Name

 

1

 

Instrument Panel Accessory Trim Plate

 

Tip

Use a flat-bladed plastic trim tool in order to release the retainer clips securing the trim plate to the instrument panel.

 

2

 

Retainer Clips (Qty: 9)

 

© 2008 General Motors Corporation. All rights reserved.

[jrrod2004]

Service Information

 

2008 GMC Truck Sierra - 2WD | Sierra, Silverado (VIN C/K) Service Manual | Document ID: 1740958 HVAC Control Module Replacement

 

Callout

 

Component Name

 

 

Preliminary Procedure

1. Remove the instrument panel accessory trim plate. Refer to Instrument Panel Accessory Trim Plate Replacement .
   
2. Remove the accessory switch assembly. Refer to Accessory Switch Replacement .
   
3. Disconnect the electrical connectors.
   

1

 

Screw, Control Assembly - Heater and Air Conditioning (Qty: 2)

 

Notice: Refer to Fastener Notice in the Preface section.

 

Tighten

1.5 N·m (13 lb in)

 

2

 

Control Assembly, Heater and Air Conditioning

 

Tip

HVAC Control Module must be reprogrammed. Refer to Control Module References .

 

© 2008 General Motors Corporation. All rights reserved.

[jrrod2004]

Service Information

 

2008 GMC Truck Sierra - 2WD | Sierra, Silverado (VIN C/K) Service Manual | Document ID: 1833060 Instrument Panel Center Trim Panel Replacement (with RPO SLT)

 

Callout

 

Component Name

 

1

 

Instrument Panel Center Trim Plate

 

Tip

 

1. Use a flat-bladed plastic trim tool in order to release the retainer clips securing the trim plate to the instrument panel.
   
2. Disconnect the electrical connections.
   

2

 

Retainer Clips (Qty: 7)

 

© 2008 General Motors Corporation. All rights reserved.

[jrrod2004]

Service Information

 

2008 GMC Truck Sierra - 2WD | Sierra, Silverado (VIN C/K) Service Manual | Document ID: 1809105 Radio Antenna Replacement

 

Callout

 

Component Name

 

 

Preliminary Procedures

1. Remove the battery. Refer to Battery Replacement .
   
2. Remove the instrument panel (I/P) upper trim pad. Refer to Instrument Panel Upper Trim Panel with Windshield Defroster Nozzle Grille Replacement .
   
3. Disconnect the upper intermediate steering shaft. Refer to Upper Intermediate Steering Shaft Replacement .
   
4. Remove the 4 I/P bolts to body bolts.
   
5. Disconnect the 5 electrical connections on the passenger side.
   
6. Pull the passenger side of the I/P back approximately 760 mm (2.5 ft) pivoting on the drivers side . Set on floor or seat.
   
7. Remove the 2 screws from the HVAC recirculation door and push door towards the center of the vehicle. Refer to Air Inlet Assembly Replacement .
   
8. Disconnect the coaxial cable at the junction.
   
9. Insert a shim between the HVAC and side metal approximately 38 mm (1.5 in).
   
10. Tape pull wire to the coaxial cable.
    

1

 

Radio Antenna Mast

 

Notice: Refer to Fastener Notice in the Preface section.

 

Tighten

6 N·m (53 lb in)

 

2

 

Air Inlet Grille Outer Cover

 

3

 

Radio Antenna Assembly Screw (Qty: 3)

 

Tighten

5 N·m (44 lb in)

 

4

 

Radio Antenna Assembly

 

Tip

 

1. Remove the cable grommet from the body using the screwdriver from top down.
   
2. Tie a long wire to the antenna cable to aid in installation of new antenna. Use a screwdriver to guide the cable from the inside.
   
3. Tape a long pull wire to the antenna cable to aid in installation of the new antenna. Use a screwdriver to guide the wire from the inside.
   
4. Lubricate the grommet to aid in installation.
   

© 2008 General Motors Corporation. All rights reserved.

[jrrod2004]

Service Information

 

2008 GMC Truck Sierra - 2WD | Sierra, Silverado (VIN C/K) Service Manual | Document ID: 1707469 Air Inlet Assembly Replacement

 

Callout

 

Component Name

 

 

Preliminary Procedure

1. Remove the HVAC module assembly. Refer to HVAC Module Assembly Replacement .
   
2. Disconnect the electrical connector from the recirculation actuator.
   

1

 

Recirculation Actuator Screw (Qty: 2)

 

Notice: Refer to Fastener Notice in the Preface section.

 

Tighten

1.5 N·m (13 lb in)

 

2

 

Recirculation Actuator

 

3

 

Air Inlet Assembly Screw (Qty: 2)

 

Tighten

1.5 N·m (13 lb in)

 

4

 

Air Inlet Assembly

 

Tip

Tilt the rear of the air inlet assembly upward to release front mounting tabs.

 

© 2008 General Motors Corporation. All rights reserved.

[jrrod2004]

That is for the routing views for both the base level and SLT version of the truck...hope it helps

[timmerk]

That is for the routing views for both the base level and SLT version of the truck...hope it helps

 

It helps a lot - thanks!

[rgreenbank]

I have a 2008 Sierra SLE with the two glove box setup. I need to replace the antenna base. I've got the radio removed, Glove boxes, antenna base screws removed. I can't seem to reach the whole cable. It is wrapped in foam and zip tied. It looks like the new base and cable are not long enough to reach the back of the radio. Some posts I have seen say there is a junction where the base cable connects to the radio cable. If there is a junction can someone tell me how to access it?

 

Thanks a lot for any help,

 

Ron

[mike94silverado]

That's a lot of work... I just put an amplified alpine Glass mount antenna on my rear window and eventually i'm going to cap the mast.

[rgreenbank]

Thanks to the above posts I found the connection under the dash pad unfortunately my tape job failed when I tried to pull a wire through to pull the new cable back. I can get wires, coat hangers, fish tapes, etc. in the firewall hole from the outside but the all seem to hit something and I can't find my way into the cab. Does anyone have any pointers?

[rockster]

Thanks to the above posts I found the connection under the dash pad unfortunately my tape job failed when I tried to pull a wire through to pull the new cable back. I can get wires, coat hangers, fish tapes, etc. in the firewall hole from the outside but the all seem to hit something and I can't find my way into the cab. Does anyone have any pointers?

 

After a day and a half of slaving I got the cable through without removing the HVAC module. Your problem is that the hole you see from the outside is covered with insulation on the inside and then blocked with the recirc air inlet. I had to take the dash cover completely off including passenger airbag , then with a wire coat hanger bent into a hook and another tool to make room and light (my inspection camera was great for that) and the help of my wife I managed to fish it through. There is no access with the dash in place, even if you take out the glove boxes. When you poke through your cable or a wire, you hit the insulation at a right angle, getting the center pin stuck in the insulation. I actually had to rip out a little bit of matting with the coat hanger to make enough room to turn the corner with the antenna plug. Once I saw the plug come in through the hole I managed to hook it with the coat hanger and pull it out, you need someone though to help you feed it from the outside or you will slip off the plug every time. Have a look at the pictures and you can get an idea how this cable runs.

 

It's a lot of work and frustration but still better than going to the dealer and dropping tons of cash.