2009 GMC Sierra 1500 Speaker Sizes and Audio System Guide
2009 GMC Sierra 1500 Speaker Sizes and Audio System Guide
This page summarizes the factory speaker layout and upgrade considerations for the 2009 GMC Sierra 1500. Equipment can vary by trim, body style, and audio package, so some trucks use different speaker counts or include optional tweeters and a subwoofer if equipped. Use the details here to identify the locations in your truck and verify the factory setup before choosing replacement speakers or planning an audio upgrade.
Data verified by Nick Marchenko, PhD
Speaker Size Chart – 2009 GMC Sierra 1500
Use this table as the main reference. Fitment depends on trim, factory audio package, mounting depth, and adapter availability.
| Location | Type | Factory Size | Note |
|---|---|---|---|
| Front Pillar | Tweeter | .75 inch | if equipped |
| Front Door | Full-Range | 6.5 inch | |
| Rear Door | Full-Range | 5.25 inch | |
| Mid-Rear Pillar (C) | Full-Range | 4 x 6 inch | |
| Front Center Console | Subwoofer | 6.5 inch | if equipped |
Generic speaker location diagram. The table above shows the specific factory sizes for this vehicle. Exact location details may vary by body style and trim.
Speaker Count by Trim – 2009 GMC Sierra 1500
Speaker count and audio equipment vary by trim and factory audio package. This table lists known configurations from our database.
| Trim | Speakers | Amplifier | Radio | Navigation |
|---|---|---|---|---|
| Denali 4x2 Crew Cab 5.75 ft. box 143.5 in. WB | 7 | std | – | – |
| Denali 4x4 Crew Cab 5.75 ft. box 143.5 in. WB | 7 | std | – | – |
| SLT 4x2 Crew Cab 5.75 ft. box 143.5 in. WB | 7 | std | – | – |
| SLT 4x2 Extended Cab 5.75 ft. box 133.9 in. WB | 7 | std | – | – |
| SLT 4x2 Extended Cab 6.6 ft. box 143.5 in. WB | 7 | std | – | – |
| SLT 4x2 Extended Cab 8 ft. box 157.5 in. WB | 7 | std | – | – |
| SLT 4x4 Crew Cab 5.75 ft. box 143.5 in. WB | 7 | std | – | – |
| SLT 4x4 Extended Cab 5.75 ft. box 133.9 in. WB | 7 | std | – | – |
| SLT 4x4 Extended Cab 6.6 ft. box 143.5 in. WB | 7 | std | – | – |
| SLT 4x4 Extended Cab 8 ft. box 157.5 in. WB | 7 | std | – | – |
| SL 4x2 Crew Cab 5.75 ft. box 143.5 in. WB | 6 | – | – | – |
| SL 4x2 Extended Cab 6.6 ft. box 143.5 in. WB | 6 | – | – | – |
| SL 4x4 Crew Cab 5.75 ft. box 143.5 in. WB | 6 | – | – | – |
| SL 4x4 Extended Cab 6.6 ft. box 143.5 in. WB | 6 | – | – | – |
| SLE1 4x2 Crew Cab 5.75 ft. box 143.5 in. WB | 6 | opt | – | – |
| SLE1 4x2 Extended Cab 5.75 ft. box 133.9 in. WB | 6 | opt | – | – |
| SLE1 4x2 Extended Cab 6.6 ft. box 143.5 in. WB | 6 | opt | – | – |
| SLE1 4x2 Extended Cab 8 ft. box 157.5 in. WB | 6 | opt | – | – |
| SLE1 4x4 Crew Cab 5.75 ft. box 143.5 in. WB | 6 | opt | – | – |
| SLE1 4x4 Extended Cab 5.75 ft. box 133.9 in. WB | 6 | opt | – | – |
| SLE1 4x4 Extended Cab 6.6 ft. box 143.5 in. WB | 6 | opt | – | – |
| SLE1 4x4 Extended Cab 8 ft. box 157.5 in. WB | 6 | opt | – | – |
| SLT 4x2 Extended Cab 5.75 ft. box 133.9 in. WB | 6 | – | – | – |
| Work Truck 4x2 Crew Cab 5.75 ft. box 143.5 in. WB | 6 | – | – | – |
| Work Truck 4x2 Extended Cab 6.6 ft. box 143.5 in. WB | 6 | – | – | – |
| Work Truck 4x2 Extended Cab 8 ft. box 157.5 in. WB | 6 | – | – | – |
| Work Truck 4x4 Crew Cab 5.75 ft. box 143.5 in. WB | 6 | – | – | – |
| Work Truck 4x4 Extended Cab 5.75 ft. box 133.9 in. WB | 6 | – | – | – |
| Work Truck 4x4 Extended Cab 6.6 ft. box 143.5 in. WB | 6 | – | – | – |
| Work Truck 4x4 Extended Cab 8 ft. box 157.5 in. WB | 6 | – | – | – |
| Xtra Fuel Economy 4x2 Crew Cab 5.75 ft. box 143.5 in. WB | 6 | opt | – | – |
| SLE1 4x2 Regular Cab 6.6 ft. box 119 in. WB | 4 | – | – | – |
| SLE1 4x2 Regular Cab 8 ft. box 133 in. WB | 4 | – | – | – |
| SLE1 4x4 Regular Cab 6.6 ft. box 119 in. WB | 4 | – | – | – |
| SLE1 4x4 Regular Cab 8 ft. box 133 in. WB | 4 | – | – | – |
| Work Truck 4x2 Regular Cab 6.6 ft. box 119 in. WB | 4 | – | – | – |
| Work Truck 4x2 Regular Cab 8 ft. box 133 in. WB | 4 | – | – | – |
| Work Truck 4x4 Regular Cab 6.6 ft. box 119 in. WB | 4 | – | – | – |
| Work Truck 4x4 Regular Cab 8 ft. box 133 in. WB | 4 | – | – | – |
Data sourced from manufacturer specifications. Verify with the window sticker or dealer before ordering audio components.
Vehicle and Audio System Specifications
This block helps identify the vehicle and its audio system configuration for fitment decisions.
What Speakers Fit the 2009 GMC Sierra 1500?
Aftermarket fitment should start with the factory speaker locations listed for this 2009 GMC Sierra 1500, but diameter alone is not enough. Check mounting depth, bracket fit, connector type, and whether the truck has a premium or factory-amplified audio system. The listed speaker sizes give you a solid starting point, but equipment can vary by trim and audio package. Selected audio systems may also include an optional subwoofer, so verify the exact setup before ordering.
Usually Safe Upgrades
- If your vehicle uses the front door 6.5 inch location, that is the main full-range speaker position to match first.
- If your vehicle uses the rear door 5.25 inch location, choose a speaker sized for that opening and confirm depth before buying.
- If your vehicle uses the mid-rear pillar 4 x 6 inch location, look for a speaker that matches that shape and mounting pattern.
- If your vehicle has the optional front pillar tweeters, replace them with .75 inch tweeters only when that location is equipped.
- If your vehicle has the optional front center console subwoofer, match the 6.5 inch subwoofer opening only when that system is present.
Check Before Buying
- Confirm the exact trim and audio package, since speaker count ranges from 4 to 7 and equipment can vary.
- Verify whether the vehicle has the optional tweeters or optional subwoofer before choosing a full speaker set.
- Check mounting depth and factory connector style so the new speakers will physically fit the opening.
- If the truck has a factory-amplified system, make sure the replacement speakers are compatible with that setup.
- Use the factory location list as your guide, but compare each opening individually instead of assuming every cab or trim uses the same layout.
Installation Notes
The 2009 GMC Sierra 1500 uses a mix of speaker locations and sizes, so verify the exact audio layout before ordering parts. Front door openings are listed at 6.5 inches, rear door openings at 5.25 inches, and some systems also include a 0.75-inch front pillar tweeter if equipped. A 4 x 6-inch full-range speaker is also listed in the mid-rear pillar area, and if your vehicle has the factory subwoofer, it is listed as a 6.5-inch unit in the front center console. Panel removal is usually needed to access the speakers, so work carefully to avoid breaking clips or damaging trim. Check speaker depth before installation, especially in the doors and console area, because clearance can vary by location. Mounting adapters may be needed to match the factory openings, and harness adapters can help preserve the original wiring. If the truck has a factory amplifier, verify the trim and audio package before choosing replacement speakers or integration parts. After installation, test each speaker location one at a time to confirm balance, polarity, and proper operation before reinstalling all panels.
Moderate difficulty, since access, speaker depth, and trim-dependent audio equipment can change the installation process.
Common Mistakes When Replacing Speakers
The 2009 GMC Sierra 1500 can use different speaker layouts and audio packages, so the safest upgrade plan starts with verifying the exact equipment on the truck you have.
- Buying based only on the body-style label instead of checking actual speaker locations on the vehicle.
- Assuming every trim uses the same speaker count or amplifier setup instead of confirming the trim and audio package first.
- Ignoring the optional tweeter and subwoofer locations if equipped, which can change the parts you need and the way the system is wired.
- Choosing speakers without checking mounting depth, basket clearance, and connector style, which can cause fitment problems even when the size looks correct.
- Skipping verification of factory amplifier details by trim and audio package, since some versions use different audio hardware than others.
- Reassembling the doors or panels before testing every speaker for polarity, balance, and output, which can hide wiring or connection mistakes.
Generation & Model Family
The 2009 GMC Sierra 1500 belongs to the Third generation (GMT900) (2007–2013) family. Nearby model years often share similar speaker locations and audio layouts, but exact fitment can vary by trim and audio package – verify before ordering.
Recommended Upgrade Path
The 2009 GMC Sierra 1500 uses different speaker layouts depending on trim and audio package, so the best upgrade plan starts with confirming your exact equipment. Most buyers get the biggest payoff by improving the front stage first, then adding bass or amplification only if the truck’s current system and goals call for it.
| Goal | Best Upgrade Path | Why |
|---|---|---|
| Better clarity | Upgrade the front door speakers first, then replace the front pillar tweeters if equipped. If your truck has the rear door or mid-rear pillar speakers, keep those in the system for balance after the front stage is improved. | Clarity usually comes from the front of the cabin, where vocals and high-frequency detail are heard most clearly. Since tweeters are listed for some equipment, upgrading the front stage can sharpen mids and highs without changing the rest of the system right away. |
| More bass | If equipped, treat the factory center-console subwoofer as something to verify before upgrading, then add an aftermarket subwoofer system to handle low-end output more effectively. If your truck does not have that option, adding a subwoofer is still the cleanest way to extend bass response. | A dedicated subwoofer handles low frequencies better than full-range speakers alone. Factory subwoofer details should be verified by trim and audio package, and an aftermarket bass upgrade can fill in the low end without asking the door speakers to do too much. |
| Louder sound | Use properly matched speakers and amplifier integration to improve volume and reduce distortion. Verify factory amplifier details by trim and audio package before adding aftermarket amplification, then build around the front speakers first for the best result. | Higher volume only helps if the system stays clean at louder levels. Matching the speakers and amplifier correctly matters, and factory amp or premium system integration should be checked before adding new amplification so the upgrade works with the truck’s existing audio setup. |
| Budget improvement | Replace the front door speakers first with same-size replacement speakers and correct mounting brackets. If you want a little more improvement later, add the rear speakers after the front stage is finished. | The front doors do the most work in daily listening, so they usually give the best value for the money. Starting there keeps the upgrade focused and lets you hear a clear improvement without replacing the entire system at once. |
| Factory look | Use same-size replacement speakers with the correct mounting brackets and harness adapters for a clean install that preserves the factory wiring and appearance. Keep the upgrade centered on the existing speaker locations so the cabin stays visually close to stock. | A clean factory-style result depends on matching the original openings and using the right adapters. That approach helps the system look original while still improving sound, and it avoids unnecessary changes to the truck’s interior appearance. |
Mounting Adapters and Wiring
The same nominal diameter does not guarantee a direct mount. Before ordering, confirm:
- Speaker depth: Aftermarket speakers often have larger magnets – measure available depth at each location.
- Mounting brackets: Door locations typically need a bracket or spacer to clear the window regulator and achieve correct mounting depth.
- Wiring harness adapters: Use a plug-and-play harness adapter to preserve factory wiring.
- Tweeter mounting cups: Replacing OEM tweeters may require surface-mount cups or brackets depending on the location.
- Factory or premium amplified systems: If the vehicle has a premium or factory-amplified audio system, confirm how the factory radio, amplifier, and speakers are connected before adding aftermarket amplifiers. Depending on the setup, a line output converter, DSP, integration harness, or professional installation may be needed.
- Connector type: Factory connectors vary by trim and model year – confirm compatibility before splicing or using an adapter.
Frequently Asked Questions
What size are the front door speakers in a 2009 GMC Sierra 1500?
The front door speakers are 6.5 inches. Front pillar tweeters are 0.75 inch if equipped, and speaker layouts can vary by trim and audio package.
What size are the rear speakers in a 2009 GMC Sierra 1500?
The rear door speakers are 5.25 inches. Some audio setups may also include a 4 x 6 inch mid-rear pillar speaker, depending on the equipment package.
Does the 2009 GMC Sierra 1500 have a factory subwoofer?
A 6.5-inch factory subwoofer is listed if equipped. It appears to be trim-dependent, so verify the audio package before planning an upgrade.
Can I replace the speakers without changing the radio?
Yes, speaker replacement can be done without replacing the radio. The exact setup depends on trim and audio equipment, so confirm the speaker locations and any factory amp before choosing parts.
Do I need mounting adapters for speaker upgrades?
Mounting adapters may be needed depending on the speaker location and the replacement speaker you choose. Check the factory sizes first, especially for the front doors, rear doors, and any optional locations.
Is there a factory amplifier in the 2009 GMC Sierra 1500?
Factory amplifier details should be verified by trim and audio package. Some trims list a standard amplifier, some list an optional one, and others show no amplifier in the trim data.