Garage
Shop

1981 GMC P3500

Universal gear includes car amplifiers, subs, and other products that do not install in a specific location or require fitment to integrate with a vehicle.

Universal-Fit Audio for 1981 GMC P3500

When thinking of universal gear, we consider products like a car amp that gives more power to your speakers or subs, cell phone chargers, equalizers and sound processors, rear-seat entertainment and video monitors, as well as dash cameras.

Loading...
Filters
You Recently Chose:

We are sorry, no available results!

filter-icon Filters & Sort

Belva BTK112

12-Piece Installer's Master Panel Removal Tool Kit

BTK112 big
Go to item page Right Arrow Icon of Right Arrow

12-Piece Installer's Master Panel Removal Tool Kit

• 12 Piece Installers Removal Tool Kit
• Made From Nylon Plastic and Metal
• Includes with Ford Removal Keys and Euro Radio Removal Keys
• Various Shapes and Sizes for Different Needs

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

19
List price $24.99
-64% $8.99

In stock

• 12 Piece Installers Removal Tool Kit
• Made From Nylon Plastic and Metal
• Includes with Ford Removal Keys and Euro Radio Removal Keys
• Various Shapes and Sizes for Different Needs

Directed 504D

Stinger DoubleGuard Shock Sensor

504D big
Go to item page Right Arrow Icon of Right Arrow

Stinger DoubleGuard Shock Sensor

• Stinger DoubleGuard Shock Sensor
• Adjustable Sensitivity
• Wire Harness Included

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

3
List price $31.99
-38% $19.99

In stock

Only 3 Left!

• Stinger DoubleGuard Shock Sensor
• Adjustable Sensitivity
• Wire Harness Included

Stinger SPT521

Gauge Reducer, 1/0 Gauge Input to 4 Gauge Pin

SPT521 big
Go to item page Right Arrow Icon of Right Arrow

Gauge Reducer, 1/0 Gauge Input to 4 Gauge Pin

• Gauge Reducer Adapter
• 1/0 Gauge Input to 4 Gauge Pin
• Deep Wire Recesses
• Ultimate Power Delivery
• Corrosion Resistant Shoc-Krome Plating

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

41
List price $29.00
-55% $12.99

In stock

• Gauge Reducer Adapter
• 1/0 Gauge Input to 4 Gauge Pin
• Deep Wire Recesses
• Ultimate Power Delivery
• Corrosion Resistant Shoc-Krome Plating

NVX XIV25

16.4 ft (5 meter) 2-Channel V-Series RCA Audio Interconnect Cable

XIV25 big
Go to item page Right Arrow Icon of Right Arrow

16.4 ft (5 meter) 2-Channel V-Series RCA Audio Interconnect Cable

• Shielded noise-rejecting Twisted-pair construction
• Heavy gauge OFC conductors ensure superior sound quality
• Split-tip Silver-Plated ends offer best in class signal transfer
• Molded ends equipped with colored channel identifiers

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

43
List price $18.99
-32% $12.99

In stock

• Shielded noise-rejecting Twisted-pair construction
• Heavy gauge OFC conductors ensure superior sound quality
• Split-tip Silver-Plated ends offer best in class signal transfer
• Molded ends equipped with colored channel identifiers

Wet Sounds ADP TC3-S

1-7/8" to 3" Stainless Steel Swivel Clamp for REV and ICON Series Tower Speakers

ADP TC3-S big
Go to item page Right Arrow Icon of Right Arrow

1-7/8" to 3" Stainless Steel Swivel Clamp for REV and ICON Series Tower Speakers

• High-polished stainless steel tower speaker swivel clamps
• Designed to fit tube diameters of 1-7/8" up to 3"
• Fits REV8, REV10, and ICON8 tower speakers
• Includes mounting bolts

shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $58.00 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

1
$579.99

In stock

Only 2 Left!

• High-polished stainless steel tower speaker swivel clamps
• Designed to fit tube diameters of 1-7/8" up to 3"
• Fits REV8, REV10, and ICON8 tower speakers
• Includes mounting bolts

Axxess AX-TRIG1

Universal Parking Brake Bypass Module for Aftermarket Stereos

AXTRIG big
Go to item page Right Arrow Icon of Right Arrow

Universal Parking Brake Bypass Module for Aftermarket Stereos

• Universal Parking Brake Bypass Module
• Designed for use in RVs, off-road, and exhibition vehicles
• Emulates a parking brake signal

shipping truck icon Free shipping in USA. Provide zip for delivery date.
17
List price $24.99
-12% $21.99

In stock

• Universal Parking Brake Bypass Module
• Designed for use in RVs, off-road, and exhibition vehicles
• Emulates a parking brake signal

Crimestopper LP-FRAME-BLK

License Plate Frame for CAM-300 and CAM-400 Backup Camera (Black)

LP-FRAME-BLK big
Go to item page Right Arrow Icon of Right Arrow

License Plate Frame for CAM-300 and CAM-400 Backup Camera (Black)

• Full Frame License Plate Frame Camera Bracket
• Works exclusively with CAM-300 and CAM-400
• Powder coated black metal finish
• Hidden wiring for easy installation

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $53.98
-33% $35.99

In stock

Only 1 Left!

• Full Frame License Plate Frame Camera Bracket
• Works exclusively with CAM-300 and CAM-400
• Powder coated black metal finish
• Hidden wiring for easy installation

2 Pack of 200 Amp Nickel-Plated ANL Fuse (Belva BANL200)

Two fuses per order. High quality 200 Amp ANL Fuses

BANL200 big
Go to item page Right Arrow Icon of Right Arrow

Two fuses per order. High quality 200 Amp ANL Fuses

• 200A ANL Fuse
• 2 Pack
• Nickel Plated
• Resealable Polybag
• Heavy Duty Construction

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

22
List price $7.99
-50% $3.99

In stock

• 200A ANL Fuse
• 2 Pack
• Nickel Plated
• Resealable Polybag
• Heavy Duty Construction

JL Audio SGR-12TW3

Mesh Grille for JL Audio 12" TW3 Subwoofers

SGR-12TW3 big
Go to item page Right Arrow Icon of Right Arrow

Mesh Grille for JL Audio 12" TW3 Subwoofers

• 12" Subwoofer Grille
• Steel Mesh Material
• For Use with TW3 Series Subwoofers
• Powder Coated Satin Black Finish

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

6
$49.99

In stock

Only 1 Left!

• 12" Subwoofer Grille
• Steel Mesh Material
• For Use with TW3 Series Subwoofers
• Powder Coated Satin Black Finish

Limited time!

NVX NDA6004

1200W Peak (600W RMS) Class D N-Series 4-Channel Amplifier

NDA6004 big
Go to item page Right Arrow Icon of Right Arrow

1200W Peak (600W RMS) Class D N-Series 4-Channel Amplifier

• 100 watts x 4 channel @ 4 ohm
• 160 watts x 4 channel @ 2 ohm
• Bridged: 320 watts x 2 channel @ 4 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable 4-Channel Amplifier

Save 30% off an NVX XKIT44 Amp Kit at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $16.00 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

14
List price $215.99
-26% $159.99

In stock


Available Deal
NDA6004 main
Offer may end without notice

Eligible items

Shop items below for 30% off up to $100 discount on Save 30% off an NVX Amp Kit!

NVX XKIT44

$119.99

$83.99

$36 Savings!

Add to cart

Rockford Fosgate PP4-X

250W Peak (125W RMS) 4-Ohm Passive Crossover

PP4-X big
Go to item page Right Arrow Icon of Right Arrow

250W Peak (125W RMS) 4-Ohm Passive Crossover

• Passive Crossover
• 250W Max and 125W RMS
• Dual Woofer Outputs
• Includes Mounting Hardware
• Designed for Punch Pro Midrange Drivers and Tweeters

shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $10.00 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

$99.99

In stock

• Passive Crossover
• 250W Max and 125W RMS
• Dual Woofer Outputs
• Includes Mounting Hardware
• Designed for Punch Pro Midrange Drivers and Tweeters

i-Beam TE-360-3D

Full-Car Coverage Camera and DVR System w/ 3D View and Backup Camera Features

TE-360-3D big
Go to item page Right Arrow Icon of Right Arrow

Full-Car Coverage Camera and DVR System w/ 3D View and Backup Camera Features

• 360 Degree Camera System
• Backup Camera Included
• DVR Records from All Four Cameras
• 3d Overhead View Available

shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $120.00 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $1496.00
-20% $1,199.99

In stock

Only 1 Left!

• 360 Degree Camera System
• Backup Camera Included
• DVR Records from All Four Cameras
• 3d Overhead View Available

Omega DS-2.4

Economy Door Lock Actuator

DS-2.4 big
Go to item page Right Arrow Icon of Right Arrow

Economy Door Lock Actuator

• Single Door Lock Actuator
• Converts Manual Doorlocks Into Power Doorlocks
• Two-Wire Reverse Polarity Operation
• Universal Mounting Hardware Included

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

5
List price $19.99
-40% $11.99

In stock

• Single Door Lock Actuator
• Converts Manual Doorlocks Into Power Doorlocks
• Two-Wire Reverse Polarity Operation
• Universal Mounting Hardware Included

NVX XSBI500

500-Amp Microprocessor-Controlled Dual Sensing Smart Battery Isolator and Relay (Handles up to 700-Amp Surge)

XSBI500 big
Go to item page Right Arrow Icon of Right Arrow

500-Amp Microprocessor-Controlled Dual Sensing Smart Battery Isolator and Relay (Handles up to 700-Amp Surge)

• 500-Amp continuous / 700-Amp surge
• Ideal for car stereo systems and mobile electronics
• Prevents the main starter battery from draining
• 10V to 16.5V DC operating range

shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $9.00 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

8
List price $109.99
-18% $89.99

In stock

Used from: $69.99

• 500-Amp continuous / 700-Amp surge
• Ideal for car stereo systems and mobile electronics
• Prevents the main starter battery from draining
• 10V to 16.5V DC operating range

Belva BAK82

8 Gauge Premium (CCA) Copper Clad Aluminum Complete 2-Channel Amplifier Wiring Kit with RCA for Amplifiers up to 600 Watts - RED

BAK82 big
Go to item page Right Arrow Icon of Right Arrow

8 Gauge Premium (CCA) Copper Clad Aluminum Complete 2-Channel Amplifier Wiring Kit with RCA for Amplifiers up to 600 Watts - RED

• Complete 8 Gauge Amplifier Installation Kit
• For Amplifiers Up To 600 Watts RMS
• Premium (CCA) Copper Clad Aluminum
• Helical Twist 2-Channel RCA Cable
• ANL/Mini-ANL Fuse Holder with 60 amp fuse
• Complies to American Wire Gauge standards

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

97
List price $49.99
-50% $24.99

In stock

Used from: $27.99 Like New from: $33.99

NVX NDA12001

2400W Peak (1200W RMS) Class D N-Series Monoblock Car Amplifier with Bass Remote

NDA12001 big
Go to item page Right Arrow Icon of Right Arrow

2400W Peak (1200W RMS) Class D N-Series Monoblock Car Amplifier with Bass Remote

• 500 watts x 1 channel @ 4 ohm
• 850 watts x 1 channel @ 2 ohm
• 1200 watts x 1 channel @ 1 ohm
• Total RMS Power: 1200 watts
• Class D 1 ohm Stable Monoblock Amplifier

shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $17.00 in rewards to spend later

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

13
List price $239.99
-29% $169.99

In stock

Kicker KMLC (41KMLC)

LED Light Remote for KM Speakers (with receiver module)

KMLC big
Go to item page Right Arrow Icon of Right Arrow

LED Light Remote for KM Speakers (with receiver module)

• For Use with Kicker Marine Coaxials and Subwoofers
• Provides Multi-Function Control of LED Lighting
• Ultra Slim Remote
• 19 Dynamic Modes

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

4
List price $69.99
-14% $59.99

In stock

• For Use with Kicker Marine Coaxials and Subwoofers
• Provides Multi-Function Control of LED Lighting
• Ultra Slim Remote
• 19 Dynamic Modes

PAC SNI-1/3.5

3.5mm Ground Loop Noise Isolator Works

SNI-1/3.5 big
Go to item page Right Arrow Icon of Right Arrow

3.5mm Ground Loop Noise Isolator Works

• Ground Loop Isolator
• Close to Perfect Response of +/- 0.03 dB From 2-20,000 Hz
• Utilizes Proprietary Audio Transformers for a 1.3 dB Gain
• Female 3.5mm Input
• Male 3.5mm Output

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

85
List price $19.00
-16% $15.99

In stock

Only 1 Left!

• Ground Loop Isolator
• Close to Perfect Response of +/- 0.03 dB From 2-20,000 Hz
• Utilizes Proprietary Audio Transformers for a 1.3 dB Gain
• Female 3.5mm Input
• Male 3.5mm Output

Limitless Lithium LL3.5A-MTN-HV

3.5A 15V Portable Automatic Smart Lithium High Voltage Maintainer

LL3.5A-MTN-HV big
Go to item page Right Arrow Icon of Right Arrow

3.5A 15V Portable Automatic Smart Lithium High Voltage Maintainer

• Portable Automatic Smart Lithium High Voltage Maintainer
• Lithium LTO Battery Maintainer 3.5 Amp
• Designed for charging 15 volts batteries
• Shuts off when the battery is charged
• Can be used as a "Maintainer" for all LTO and high voltage lithium batteries

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

$89.00

In stock

Only 2 Left!

• Portable Automatic Smart Lithium High Voltage Maintainer
• Lithium LTO Battery Maintainer 3.5 Amp
• Designed for charging 15 volts batteries
• Shuts off when the battery is charged
• Can be used as a "Maintainer" for all LTO and high voltage lithium batteries

Metra 82-6900

1.5" Spacer Ring for 6x9" Speakers

82-6900 big
Go to item page Right Arrow Icon of Right Arrow

1.5" Spacer Ring for 6x9" Speakers

• 6" x 9" Universal Speaker Spacers / Depth Extenders
• Adds 1-1/2" depth to speakers
• Items that make the installer's Life easier
• Trimrings and Trimplates
• Speaker Grills
• Speaker Adapter plates

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

18
List price $21.99
-50% $10.99

In stock

• 6" x 9" Universal Speaker Spacers / Depth Extenders
• Adds 1-1/2" depth to speakers
• Items that make the installer's Life easier
• Trimrings and Trimplates
• Speaker Grills
• Speaker Adapter plates

Items per page: 20 40 60

    Clear all
    why-shoping-with-sonic

    We love people and we're ready to help you! See what separates us from our competition.

    Take advantage of our VIP rewards like 10% back on your purchases, free 2-day shipping, extended warranties, and free returns! Gain access to all of these rewards without any membership fees.
    Get great discounted (and possibly FREE) installation accessories with most car stereo purchases. This includes dash kits, wiring harnesses and antenna adapters that you will need to properly install your new car stereo.
    We are an Authorized Dealer for all the brands we sell, including the most premium brands in car and marine audio such as Hertz, JL Audio, NVX, Rockford Fosgate, Kicker, Alpine, Kenwood and many more.
    Shop Deals and get up to 30% off premium brands! Shop Now! We are always looking out for the best products and deals to offer our customers. Don’t pay too much by shopping elsewhere!
    We have information on brands, gear, and more for you to explore! Check out our YouTube Channel for helpful how-to videos, product reviews, and Q&As. For a more detailed look, also visit our Learning Center!
    Our trained experts are here to assist you! They are just a phone call or click away to help you get the right gear for you and your vehicle!
    Why Shop With Us?
    FAQ for Universal-Fit Audio & Electronics in 1981 P3500

    Q: Can I upgrade or change the Universal-Fit Audio & Electronics in 1981 GMC P3500?

    A: Yes this page includes all the best Universal-Fit Audio & Electronics that work in your P3500.

    Save up to 10 different vehicles in your garage
    Vehicle
    Store
    Delete

    1977 Ford LTD

    2010 BMW 335i

    1998 Mercury Sable

    2017 Ford Escape

    1981 GMC G2500

    2000 Dodge Stratus

    1997 Oldsmobile Eighty Eight

    2014 Audi S8

    1981 GMC P3500

    2000 BMW 323i

    Add vehicle Clear all vehicles
    Where to find vehicle info
    Are you sure you want to clear your garage?
    This action cannot be undone. Confirm
    This category was not designed for products.
    If you continue, you will be redirected to a category customized for your vehicle. Continue
    Loading...
    Identify your vehicle and submodel details
    • Owner's manual
    • Vehicle's insurance card
    • Vehicle registration
    • Vehicle produced after 2005: Inside driver's side door
    • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
    Car Info Side Door Icon
    Vehicle Registration Icon
    Vehicle Insurance Icon

    Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

    • You see only parts engineered for your exact vehicle
    • You avoid incompatible radios, speakers, or wiring
    • Installation is smoother, faster, and frustration-free
    • You get the correct accessories the first time

    Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.