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2003 Hummer H2

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 2003 Hummer H2

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.

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Stinger SGP90300

High Power 300 Amp Circuit Breaker w/ Built-In Distribution

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High Power 300 Amp Circuit Breaker w/ Built-In Distribution

• 300 AMP Circuit Breaker
• Input Gauge Size: 0 to 4 AWG
• Maximum Output Gauge: 4 AWG

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List price $139.00
-56% $60.99

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• 300 AMP Circuit Breaker
• Input Gauge Size: 0 to 4 AWG
• Maximum Output Gauge: 4 AWG

Belva BAK82

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

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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

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97
List price $49.99
-50% $24.99

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Used from: $27.99 Like New from: $33.99

PAC BB-1PR

Pair of Bass Blocker / Passive Crossover; Removes 0-300Hz at 4 ohms, 0-150Hz at 8 ohms (BB1PR)

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Pair of Bass Blocker / Passive Crossover; Removes 0-300Hz at 4 ohms, 0-150Hz at 8 ohms (BB1PR)

&bull Pair of Bass Blockers for 6" x 9" Speakers
• Blocks 0-300Hz @ 4 Ohm
• Blocks 0-150Hz @ 8 Ohm
• Filters Out Unwanted Frequencies Towards Speakers

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List price $29.00
-45% $15.99

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&bull Pair of Bass Blockers for 6" x 9" Speakers
• Blocks 0-300Hz @ 4 Ohm
• Blocks 0-150Hz @ 8 Ohm
• Filters Out Unwanted Frequencies Towards Speakers

Wet Sounds ADP TC3-S

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

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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

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$579.99

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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

Alpine KCX-CAM1

Composite RCA to Direct Camera Adaptor for Alpine Stereos

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Composite RCA to Direct Camera Adaptor for Alpine Stereos

• Composite RCA to direct camera adaptor
• Compatible with all Alpine stereos with direct camera input
• Ideal for adding any aftermarket camera
• Plug and play, no cutting or splicing required

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List price $20.00
$19.95

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• Composite RCA to direct camera adaptor
• Compatible with all Alpine stereos with direct camera input
• Ideal for adding any aftermarket camera
• Plug and play, no cutting or splicing required

Axxess AX-TRIG1

Universal Parking Brake Bypass Module for Aftermarket Stereos

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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

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17
List price $24.99
-12% $21.99

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

Limitless Lithium LL3.5A-MTN-HV

3.5A 15V Portable Automatic Smart Lithium High Voltage Maintainer

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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

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$89.00

In stock

Only 1 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

T-Spec VBTPN

(4) 0 Gauge or (4) 4/8/10 Gauge outputs with bolt-on post for factory harness retention

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(4) 0 Gauge or (4) 4/8/10 Gauge outputs with bolt-on post for factory harness retention

• For positive or negative battery post use
• Add a Post System
• >Solid brass construction

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List price $47.99
-19% $38.99

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• For positive or negative battery post use
• Add a Post System
• >Solid brass construction

Omega LINKRLT3

Remote Start Smartphone App Upgrade with Advanced GPS Functionality

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Remote Start Smartphone App Upgrade with Advanced GPS Functionality

• Smartphone remote start car alarm app
• Compatible with Android and iPhone devices
• Unlimited range (subject to service coverage area)
• Shareable with multiple users, with set expiration date
• Premium and Premium Plus service plans available

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List price $199.95
-32% $135.99

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• Smartphone remote start car alarm app
• Compatible with Android and iPhone devices
• Unlimited range (subject to service coverage area)
• Shareable with multiple users, with set expiration date
• Premium and Premium Plus service plans available

NVX XIV25

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

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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

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List price $18.99
-32% $12.99

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• 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

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

Two fuses per order. High quality 200 Amp ANL Fuses

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Two fuses per order. High quality 200 Amp ANL Fuses

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

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23
List price $7.99
-50% $3.99

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

Rockford Fosgate PP4-X

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

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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

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$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

Limited time!

Belva BASQM

Front Load Flush Mount Flange BAWPL, BA2USB, BAVTM

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Front Load Flush Mount Flange BAWPL, BA2USB, BAVTM

• Front Load Flush Mount Flange
• For use with Belva BAWLk, BA2USB or BAVTM
• Color: Black
• Material: Plastic

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List price $1.99
-25% $1.49

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• Front Load Flush Mount Flange
• For use with Belva BAWLk, BA2USB or BAVTM
• Color: Black
• Material: Plastic

Directed 535T

Power Window Automation System w/ One Touch Operation

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Power Window Automation System w/ One Touch Operation

• Controls Operation of 2 Vehicle Windows
• Automatically Rolls Up Power Windows when the Vehicle's Security System is Armed
• One Touch Operation
• Auxiliary Channel to Vent or Roll Down Windows Completely from the Security System

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1
List price $179.99
-53% $84.99

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• Controls Operation of 2 Vehicle Windows
• Automatically Rolls Up Power Windows when the Vehicle's Security System is Armed
• One Touch Operation
• Auxiliary Channel to Vent or Roll Down Windows Completely from the Security System

Limited time!

NVX NDA6004

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

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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!
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List price $215.99
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NVX XKIT44

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NVX XW4BK20

20 ft 4-Gauge EnvyFlex True Spec Oxygen-Free Copper Power and Ground Wire (Black)

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20 ft 4-Gauge EnvyFlex True Spec Oxygen-Free Copper Power and Ground Wire (Black)

• 20 feet 4 gauge Power and Ground Wire
• Silver-tinned OFC (100% Oxygen-Free Copper) material
• Color: Black

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$54.99

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SPL-LAB Mini Bass Meter SE (Second Edition)

Compact Sound Pressure Meter with Voltage Measure Display

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Compact Sound Pressure Meter with Voltage Measure Display

• Compact standalone sound pressure meter
• Measures SPL, current, maximum, and minimum voltage
• Measures speaker tunes and subwoofers
• Attachable to car windshield

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List price $269.99
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• Compact standalone sound pressure meter
• Measures SPL, current, maximum, and minimum voltage
• Measures speaker tunes and subwoofers
• Attachable to car windshield

Viper 7756V

2-Way LCD Replacement Remote Control

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2-Way LCD Replacement Remote Control

• 2-Way Replacement Remote
• 5-Button Transmitter
• 1 Mile Range
• Color: Black

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List price $229.99
-22% $179.99

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• 2-Way Replacement Remote
• 5-Button Transmitter
• 1 Mile Range
• Color: Black

PAC SNI-1/3.5

3.5mm Ground Loop Noise Isolator Works

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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

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• 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

Stinger SGP35

500 Amp Relay and Isolator

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500 Amp Relay and Isolator

• Prevents Primary Battery Discharge
• Maximum Current Transfer
• Ideal for 2nd Audio Battery Isolation from Vehicle Systems
• 500A Constant/ 900A Peak

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List price $379.00
-69% $117.99

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• Prevents Primary Battery Discharge
• Maximum Current Transfer
• Ideal for 2nd Audio Battery Isolation from Vehicle Systems
• 500A Constant/ 900A Peak

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    FAQ for Universal-Fit Audio & Electronics in 2003 H2

    Q: Can I upgrade or change the Universal-Fit Audio & Electronics in 2003 Hummer H2?

    A: Yes this page includes all the best Universal-Fit Audio & Electronics that work in your H2.

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    • Owner's manual
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    • Vehicle produced after 2005: Inside driver's side door
    • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
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    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
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    Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.