Vehicle Applications

GMC Sierra

• 2019-2021 1500 Crew Cab | Non Amplified
• 2020-2023 2500HD-3500HD | Non Amplified

↳ Installation Time

Introduction

The following instructions will guide you through the installation process to replace the Speakers in the factory locations and add amplifiers and a subwoofer to your Ford.

TIP Before you begin, review these instructions thoroughly and ensure that all parts are present and tools are available.

WARNING Metra Electronics does not assume any responsibility for damage resulting from incorrect installation.

↳ Tools

• Drill
• Philips Driver
• Flat Blade Driver
• Hook / Pick Tool
• Panel Tool
• Hole Saw: 2 ⅜” Hole Saw
• Rachet
• Sockets: 7mm, 10mm, 13mm
• Torx: T20, T50
• Wire Cutter/Crimper Tool

↳ Parts

Dash Speaker Removal

2019-2021

Follow the steps below to remove the speakers from your dashboard.

Driver Side Dash Speaker Removal

Follow the instructions below to remove the driver’s side dash speaker.

1. Use a small flat-bladed tool to open the upper and lower handle covers (1) to access and remove the two 10 mm bolts (2).

2. Pull at the top of the panel toward the inside of the vehicle to disengage the upper panel clip.
3. Once the clip is released, pull back toward the front seat while slowly rocking back and forth.

4. Remove the instrument panel fuse block cover.

5. Remove the two (2) 7 mm bolts from the trim panel and unclip the panel.


6. Disconnect all electrical connectors.
7. Remove the one (1) 7 mm bolt from the side panel.

8. Pull up on the speaker grille panel to access the OE speaker.

9. Remove the two (2) 7 mm screws securing the dash speaker.

10. Disconnect the electrical connector and remove the speaker.

Passenger Side Dash Speaker Removal

Follow the instructions below to remove the passenger-side dash speaker.

1. Use a small flat-bladed tool to open the upper and lower handle covers (1) to access and remove the two 10 mm bolts (2).

2. Pull at the top of the panel toward the inside of the vehicle to disengage the upper panel clip.
3. Once the clip is released, pull back toward the front seat while slowly rocking back and forth.

4. Remove the side panel.

5. Remove the one (1) 7 mm screw.

6. Gently pull on the right side of the AC vent to separate the clips from the dash speaker grille.

7. With the clips released from the dash speaker grille, lift and pull the panel out from the dash.

8. Remove the two (2) 7 mm screws securing the dash speaker.

9. Disconnect the electrical connector and remove the speaker.

2022-2025

Follow the steps below to remove the speakers from your dashboard.

1. Open the upper and lower handle covers ( 1 ) with a small flat-bladed tool to access and remove the two (2) 10 mm bolts.

2. Pull the top of the panel toward the inside of the vehicle to disengage the upper panel clip.
3. Once the clip is released, pull the panel back toward the front seat and slowly rock it back and forth.

4. Using a plastic pry tool, release the panel clips along the front edge of the dashboard panel.

5. (Optional) If equipped, disconnect the electrical connector for the heads-up display (circled below).

6. Remove two (2) 7 mm screws securing the dash speaker (highlighted below).

NOTE Metra recommends using a SKU-Driver.

7. Disconnect the electrical connector (circled below).

8. Repeat the steps above to remove the speaker on the opposite side of the dash.

Dash Speaker Installation

Follow the steps below to install the speakers in your dashboard.

1. Place the speaker face down on the workbench.

2. Place the ring onto the speaker.

3. Slowly turn the ring counterclockwise to line up the threads.

4. Once the threads are aligned, slowly turn the ring clockwise to tighten it onto the speaker.

TIP Ensure that you do not cross-thread the ring on the speaker.

5. Continue turning the ring until it is seated against the speaker.

6. Using the LD-VB-TWTH2 harness, connect the wire labeled “FL DASH SPK” to the speaker on the DRIVER SIDE and route the harness across the dash to the passenger dash speaker location.

7. Install the speaker into the dash using the (2) 7mm previously removed.

8. Connect the wire labeled “FL DASH SPK” to the speaker on the PASSENGER SIDE.

9. Install the speaker into the dash using the (2) 7mm screws previously removed.

10. Route the LD-VB-TWTH2 from the passenger dash location down to the passenger kick panel. You will run these wires to the rear amplifier location later in the install.

Front Door Panel Removal

2019-2021

Follow the steps below to remove your front door panels.

1. Use a small pick tool or a flat-blade screwdriver to remove the cover inside the door handle.

2. Remove the (1) 7 mm bolt behind the cover.
3. Using a plastic pry tool, unclip the grab handle cover and slide it forward to unhook it.

4. Using a 7 mm socket, remove the (2) bolts from the armrest pull.

5. Remove (2) 7 mm bolts at the bottom of the door trim that secure the panel to the door.

6. Using a pry tool, follow these steps to remove the front side door trim:
1. Start at the front lower corner and pull the trim away from the sheet metal to disengage the panel clips.
2. Move to the rear lower corner and repeat the process to unsnap the panel clips.
3. Proceed to the rear center and pull the trim to release the clips.
4. Continue to the front center and pull the trim to disengage the clips.
5. Unhook the trim from the window’s edge by pulling it upwards using both hands.

7. Remove the lock knob and rod, ensuring the lock rod remains in the locking rod clip to prevent damage to the latch if it pivots.
8. Disconnect the door lock retainer cable from the front side door trim and the inside handle.

9. Disconnect the electrical connector (circled below).

10. Remove the door panel and place it on a clean, flat surface.
11. Repeat the steps above to remove the speaker on the opposite side of the vehicle.

Front Door Speaker Installation

Follow the steps below to install your front door speakers.

1. With the door panel removed and the speaker exposed, remove the one (1) 7 mm screw at the top of the speaker bracket.

2. With the screw removed, lightly pull the speaker to separate it from the door panel, then pull UP to remove it from the door.
3. Disconnect the speaker harness.

4. Locate one of the 82-3004, 72-4572, and the VIBE True Speakers.

5. Before installing the speaker into the speaker adapter, attach the speaker harness adapter to the speaker.
6. Cut the terminals off the harness and strip back the wire to allow securing to the screw-down terminals of the true speaker.

7. Install the speaker into the speaker adapter.

8. Attach the speaker harness to the factory harness located in the door.

9. Install the speaker into the door and secure it with the (1) 7 mm screw you removed.

NOTE Included are (2) self-tapping screws to better secure the speaker adapter plate to the door. The speaker adapter has (2) holes already pre-drilled to allow for this installation.

10. Reassemble the door in reverse order.
11. Repeat the process to install the speaker on the other side of the vehicle.

Rear Door Panel Removal

Follow the steps below to remove your rear side door trim (crew cab).

1. Remove the cover behind the door handle and remove the one (1) 7 mm screw.

2. Grasp and pull from the bottom to unclip the rear side door armrest cover trim (1) and then slide forward to unhook and remove.

3. Remove (2) 7 mm screws.

4. Remove (1) 7 mm at the bottom of the door panel.

5. When the rear side door trim (3) is sufficiently loosened, place an appropriate tool at the rear portion of the door trim to disengage the remaining retainers (2) and clip (1).

6. Unhook the rear side door trim (3) from the belt line, pulling the door trim upwards using both hands.

7. Detach the door lock retainer cable from the door trim and inside handle.

8. Disconnect the electrical connector.

9. Remove the rear side door trim and place it on a clean, flat surface.
10. Remove (1) 7 mm screw at the top of the speaker bracket.

11. With the screw removed, lightly pull the speaker to separate it from the door panel, then pull UP to remove it from the door.
12. Disconnect speaker harness.

13. Repeat the process to install the speaker on the other side of the vehicle.

Rear Door Speaker Installation

1. Prep the 82-3006 speaker adapter plate by removing the tabs that won’t be needed with a pair of pliers.

2. Locate one of the 72-4572, IBSBF65, and the VIBE 6.5” Speaker.
3. Connect the 72-4572 speaker harness to the speaker.
4. Install the speaker baffle into the speaker adapter, and then install the speaker.

5. Install the sound baffle by removing the paper and placing it inside the door panel, directly behind the speaker.

6. Install the VIBE 6.5” into the opening, securing it with the provided screws.
7. Reassemble the door in reverse order.
8. Repeat the process to install the speaker on the other side of the vehicle.

Amplifier Wiring Routing

The amplifier kit includes a 4GA Red power wire that will run from the vehicle’s battery to the cab’s rear. It also includes the MANL fuse holder with a 100 -amp MANL fuse.

Follow the steps below to route your amplifier wiring properly.

1. Open the hood and remove the cover over the battery.

TIP In this vehicle, the battery is located against the passenger firewall.

2. The amp kit comes with a short piece of 4 GA wire, as shown in the image, that connects to the vehicle battery terminal.

TIP Because the vehicle ground wire was disconnected in Step 1 above, the short Red power wire can be connected to the battery and then to the T-Spec fuse holder.

3. Using a 13 mm socket, remove one of the available lugs from the positive side of the battery to allow the installation of the ring terminal of the 4GA power wire.

4. Insert the 100amp MANL fuse into the holder using a T-20.

5. Connect the longer piece of 4GA power wire to the fuse holder.

6. Secure the 4GA power wire and fuse holder using the provided zip ties.

7. The 4 GA runs down the back of the firewall to the vehicle frame rail.

WARNING Avoid areas with high heat exposure.

8. Run the power wire along the frame and zip-tie it along the main harness toward the back of the vehicle.

TIP You will come to a silver plug. In a subsequent step, you will drill for the grommet here.

Trim and Panel Removal

Follow the steps below to remove your trim from your seat track panels.

1. Use a suitable plastic trim tool to pry upwards and release the panel clips gently.
2. Remove the front seat adjuster track finish cover.

3. Beginning at the rear of the front side-door sill-garnish-molding, pull upward at the B-pillar joint to release the Up/Down clips.
4. After releasing the clips, rotate the molding inward, then pull it rearward to disengage the two clips on the forward vertical wall (arrow below).

NOTE The kick panel and door sill are two pieces of plastic welded to make a single piece. Do not attempt to separate the joint closer to the kick panel. The single will come out after you have removed the clips.

5. Use a flat-bladed plastic tool to disengage the panel clips between the rear side door sill garnish molding and the center pillar lower trim panel.

6. Pull upward from both sides of the rear-side door-sill garnish-molding to release the panel clips from front to rear.
7. Remove the molding.

8. Remove the anchor plate cover to expose the front seat belt anchor plate tensioner bolt.

9. Using a plastic pry tool, separate the upper and the lower B-pillar panels.
10. Separate the panel from the B-pillar.

11. The above step will expose a grounding point used for the amplifier grounds in a later step (circled below).

Rear Seat Removal

Follow the steps below to remove your rear seats.

1. Remove the headrests from the back seat.

2. In front of each headrest guide, depress the seat cushion edge to expose the headrest guide release.
3. Using a flat tool, push the tab inward and pull the guide upward to remove it from the seat frame.

4. Do this for all headrest guides.
5. Lift and fold the rear seat cushions into the upright position.

6. Using a T-50 Torx, unscrew the bolt holding the retractor in place and disconnect the electrical connector.
7. Move the seat belt anchor plate and buckle out of the way.

8. Remove the (4) 10 mm bolts securing the seat back frame.

9. Lower the rear seat cushions back into place, guide the seat belt anchor plate, and buckle through the opening.
10. Using a hook tool, locate the three latches securing the rear seat back by locating the indentations on the back edge.

TIP This will take some time. Be patient.

11. Pull the latches upward to release them.
12. Lift the seat back cushion out of the vehicle.

Wiring The Amp Board

1. Mount the 6-Ch DSP amp onto the amp rack location “VIBE AMP #2”. The amp installs with its power and ground terminals facing the top of the amp rack.

2. Mount the 650.1 amp at the amp rack location “VIBE AMP #1,” with the power and ground terminals facing the top of the rack.

3. Mount the distribution block onto the amp rack in the “DIST” location.

4. Install the 8GA power wire from the distribution block to both amplifiers. The 4GA power wire will be installed when you mount the amp rack in the vehicle.

5. Remove (4) 7mm screws from the wire channel running along the rear door. This will provide a clear location to run the ground wires without interfering with any of the panels during reassembly.
6. Install the 8GA ground wire to each amplifier and trim the excess so that both ring terminals align with the OE ground point on the vehicle. Run the ground wires down the vehicle's passenger side and connect to the ground lug in the B-pillar using a 10mm ratchet.

7. Install the 1.5 RCA from the DSP RCA LOW OUTPUT into the RCA INPUT of the sub amp.

8. Install the 12-pin harness with the BLUE and ORANGE wires into the DSP amp. The BLUE wire will connect to the BLUE/WHITE wire in the 2-pin harness from the AXAMP. The ORANGE wire should be wired to the REMOTE terminal of the sub amp.

With the amp rack built, you can now install it into the vehicle.

Audio Equipment Installation

RPO Code Identification

To select the correct Axxess AXSUB T-Harness, you must locate the vehicle’s Regular Production Option (RPO) codes. These are found on the "Service Parts Identification" sticker, typically located inside the glovebox or on the driver-side door jamb. Scan the alphabetical list for 3-digit radio codes such as IOS, IOT, IOR, IOU, or IOK.

NOTE Verify your RPO code against the table below. Each configuration maps to a specific Axxess harness model required for signal integration.

RPO TABLES

LD-PAW-GM30

LD-PAW-GM31

LD-PAW-GM32

LD-PAW-GM33

With the correct T-Harness selected, you can proceed AXAMP Installation.

AXAMP Installation

1. Locate the HMI radio module in the upper passenger kick panel location.

2. Remove (2) radio harnesses from the module.

3. Plug the (2) car-side radio harnesses into the t -harness.

4. Plug the (2) male harnesses from the $true$harness into the radio module.

5. Plug the included RPAD2 into the 8-pin harness on the T-harness (Fig A).
6. Plug the 8-pin speaker extension into the T-harness. (Fig B).
7. Plug the 2-pin REMOTE OUT harness into the AXAMP (Fig C).

8. Plug the RCAs into the FRONT and REAR outputs of the AXAMP. The RCA for the subwoofer amp will come from the DSP amp output. (Fig D)

RCA ASSIGNMENT

DSP Amp Speaker Wiring

Amp 2 Speaker Wiring

Amplifier Settings

After wiring the amps, you can set the levels on the subwoofer amp before installing the amp board into the vehicle. Use a small flat-blade screwdriver to make the adjustments. The levels on the DSP amp will be set when you load the vehicle-specific tune.

Mounting the Completed Amp Board

1. Bring the amp board to the vehicle, line up the OE studs, and slide the board into place.

2. Secure the board using the (3) OE 10 mm nuts.

Wire Connections

1. Remove the jack from under the rear passenger seat to allow easier access to the floor for drilling the grommet location for the power wire.
2. Remove the wing nut and turn the RED knob on the jack to lower the piston and remove from the mount. There are (2) 10 mm nuts that need to be removed to move the jack mount.

3. Pull the carpet back to expose the metal cab floor.

4. Locate the round plate found under the cab while running the power wire.

5. Using a Unibit, drill a hole to accommodate the $true$ rubber grommet included in the kit.
6. Cut the grommet to allow the 4GA power wire to pass through.
7. Feed the power wire from under the vehicle into the cab through the grommet, toward the amp rack, to connect to the distribution block.

8. Connect the 4GA power to the distribution block using a T-20 Torx. [PHOTO]
9. Remove any excess length.
10. Remove (4) 7 mm screws from the wire channel running along the rear door. This will provide a clear location to run the ground wires without interfering with any of the panels during reassembly.

11. Run the ground wires down the vehicle’s passenger side and connect to the ground lug in the B-pillar using a 10 mm ratchet.

12. Using the included zip ties for wire management, prepare the area for reassembly.

TIP Ensure that none of the new wiring will interfere with the installation of the back seat.

DSP Setup

Once the DSP amplifier has been installed into the vehicle's audio system, loading a vehicle-specific tune can begin. Proper setup ensures the amplifier is installed correctly, allowing optimal audio performance.

The instructions below will guide you through the step-by-step process of connecting the amplifier to the software to load the vehicle-specific tune.

Once the inputs, outputs, and power harness are correctly connected, the final step in the setup process is connecting the software to the amplifier's processor.

Connecting the DSP Software to the Processor

To complete your installation, you must download the VIBE DSP software and your vehicle-specific Tune.

Follow the instructions below to complete this important step.

1. Download and unzip the VIBE DSP software (Microsoft Windows *only) for the amplifier (embedded below*).

DOWNLOAD

VIBE_DSP_0925.exe.zip12.8 MB

NOTE This Microsoft Windows-only software provides the interface for accessing and loading the amplifier's vehicle-specific tune. You cannot load the tune with the VIBE App.

2. Install the software on your computer following the manufacturer's instructions.
3. Download the below vehicle-specific JL Specific Tune .jib file to your computer (embedded below).

DOWNLOAD

GM-PPKT-2_TUNE_0626.jib15 KiB

NOTE This tune features preset settings, including time alignment, crossover settings, and equalizer adjustments. These settings allow a personalized audio experience specific to your vehicle-specific.

4. Connect the amplifier to your computer using the appropriate interface cable.

TIP A USB-C cable is required for the Vibe amp.

5. Launch the software.

NOTE The amplifier must be powered ON for the software to recognize the amplifier and load the tune. If automatic detection fails and you have verified that the amplifier is powered ON, follow the software’s instructions to establish the connection manually.

6. Click SETTINGS.

7. Click LOAD.

8. Click LOAD FILE.

9. Locate and select the file that you downloaded to your PC in Step 3 (typically the Downloads or Desktop folders).

10. Click Open (or double-click).
11. The program loads the DSP settings from the file to the amplifier, and the settings display on the screen.

12. With the file loaded, click SAVE.

13. Click SAVE FILE.

14. Select and click one of the six (6) available preset locations, and label your tune (such as Chevy Tune).

15. Click SAVE DSP to lock the settings into the DSP amplifier.

NOTE This Vibe Audio Kit was tuned on an RTA by a professional audio engineer.

WARNING Metra DOES NOT recommend adjusting any of the preset settings in the programmed DSP tune. Making any changes could degrade the audio quality or potentially damage system components.

Subwoofer Install

After connecting the speaker wires to the amplifier, connect them to the subwoofer’s terminal.

1. Run the subwoofer cable from the amp to under the driver-side rear seat.

2. Place the enclosure under the seat and connect the speaker wires.
1. Remove the speaker terminal connector from the enclosure.
2. Strip the subwoofer speaker wire from the amp so that 3/4” of copper wire is showing.

NOTE The subwoofer must be wired for 4 Ohms.

3. A jumper wire needs to be inserted into the terminal bridging VC1+ and VC2- (Fig A).
1. Accomplish this using Steps 4 and 5 below.

4. Connect the positive wire from the amp to VC2+ (Fig B).
5. Connect the negative wire from the amp to VC1- (Fig B).

6. Insert the wired terminal connector into the terminal on the subwoofer enclosure.

Testing the System

1. Connect the negative battery terminal back to the vehicle battery using a 10 mm ratchet.

2. Turn the vehicle ignition On.
3. Ensure that your volume is at a low setting, but you should hear sound.
4. Select the Fade and Balance options on the radio. The system should fade and balance as normal:
1. Fade to Front and Rear.
2. Balance Left and Right.
5. Turn on your left or right turn signal. You should hear the turn signal clicks.

NOTE The clicks may sound different than the original factory sound. This is expected.

6. The door chime feature is also retained with the AXDSPX DDSP and should be audible.
7. Turn the ignition Off.
8. Exit the vehicle and ensure all doors and the hood are closed.
9. Lock the vehicle with the key fob and let it sit for 10 minutes.

TIP To test the key fob, position it at least twenty (20) feet from the vehicle.

10. After 10 minutes, unlock the vehicle.
11. Turn the ignition On.
12. Test to ensure audio is playing.

NOTE During testing, with the back of the seat removed, you may hear slight rattling-the vents on the back wall cause it. The change in air pressure will make the vent flaps move, mimicking a rattle. With the seat installed, this rattle will not be evident.

Reassembly

After successfully testing the system, you can begin reassembling the truck’s back seat. Depending on your truck’s model, you may need to modify the rear seat to allow its reinstallation in the vehicle. Look over the instructions below to determine which steps to follow to reinstall the rear seat.

Back Seat With In-Seat Storage

TIP If you have a seat back that opens to the storage compartments, you can remove the foam from the back seat, and the inverter can be mounted to the amp board without requiring any additional modification.

Back Seat Without In-Seat Storage

If your truck has a rear seat without in-seat storage:

1. Cut the foam on the back of the seat to accommodate the amp board installed on the back wall. The area to cut is highlighted below.
2. Cut and test fit so that you only remove what actually needs to be removed.

3. Once you have cut enough foam to ensure the seat clears the amps on the amp board, you can install the seat back into the vehicle.

NOTE If you have a Back Seat with in-seat storage, you can mount the inverter on the amp board and install the seat.

WARNING If you have the Back Seat without In-Seat Storage, you cannot mount the inverter to the amp board. You will need to find a location behind the seat to store it. There is room on the driver’s side, and the factory wiring is long enough to accommodate the move there.

4. The white weather stripping can be removed, trimmed to length, and reinstalled onto the modified seat foam.
5. Reinstall the (4) 10 mm bolts to secure the back seat.

6. Move the seat belt anchor plate and buckle into place. Using a T-50 Torx screwdriver, screw the retractor plate back into place and connect the electrical connector.

7. Install the (6) headrest mounts back in place, and install the headrests.

8. Reinstall the trim pieces on the passenger side, including the B-pillar and front passenger door.
9. Reinstall the vehicle jack under the rear passenger seat.

Troubleshooting

Use the following steps to troubleshoot the installation.

No Audio Troubleshooting

If there is no audio:

1. Confirm power connections to amp.
2. Check the INPUT SELECTION on the DSP Program screen (Figure A).
1. HI LEVEL for NON-OE AMPED systems
2. LOW LEVEL for OE AMPLIFIED SYSTEMS

3. Ensure that the Volume Control on DSP Program screen is turned up. (Tune setting is 5.3) (Figure B)

Technical Support

TIP If you encounter any difficulties during installation, please carefully review the instructions and ensure that the installation was performed exactly as instructed.

Our dedicated team is here to provide you with expert assistance and guidance. Whether you're troubleshooting an installation, seeking product information, or looking for technical advice, we're committed to ensuring your experience with Metra Electronics products is seamless and satisfying.

WARNING Before contacting Metra Technical Support, ensure the vehicle is in a ready state to perform troubleshooting steps.

Contact

Email

Submit a Support Ticket

(386) 257-1187

Vehicle Fit Guide

Hours (EST)

Monday-Friday: 9:00 am - 7:00 pm Saturday: 10:00 am - 5:00 pm Sunday: 10:00 am - 4:00 pm

On this page

• Vehicle Applications
• GMC Sierra
• ↳ Installation Time
• Introduction
• ↳ Tools
• ↳ Parts
• Dash Speaker Removal
• 2019-2021
• Driver Side Dash Speaker Removal
• Passenger Side Dash Speaker Removal
• 2022-2025
• Dash Speaker Installation
• Front Door Panel Removal
• 2019-2021
• Front Door Speaker Installation
• Rear Door Panel Removal
• Rear Door Speaker Installation
• Amplifier Wiring Routing
• Trim and Panel Removal
• Rear Seat Removal
• Wiring The Amp Board
• Audio Equipment Installation
• RPO Code Identification
• RPO TABLES
• LD-PAW-GM30
• LD-PAW-GM31
• LD-PAW-GM32
• LD-PAW-GM33
• AXAMP Installation
• RCA ASSIGNMENT
• DSP Amp Speaker Wiring
• Amp 2 Speaker Wiring
• Amplifier Settings
• Mounting the Completed Amp Board
• Wire Connections
• DSP Setup
• Connecting the DSP Software to the Processor
• Subwoofer Install
• Testing the System
• Reassembly
• Back Seat With In-Seat Storage
• Back Seat Without In-Seat Storage
• Troubleshooting
• No Audio Troubleshooting
• Technical Support
• Contact
• Hours (EST)