OBS Interior Speaker and Door Panel Guide 1988-1998
If you own a 1988-1998 Chevy or GMC OBS, this guide shows common factory speaker sizes and smart upgrade paths. We start with why upgrading to Fesler door panels is the fastest way to better sound and a cleaner interior. We also include tips if you plan to keep stock panels.
Why start with Fesler door panels
- Cleaner look and better function: Strong mounting surfaces reduce flex and rattles so your speakers work the way they should.
- Real speaker options: Panel geometry supports popular 6.5 inch layouts and component placements, and pairs well with kick panels for staging.
- Customization: Upholstery, stitching, and billet options help the cabin match the rest of your build.
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Cleaner lines, solid mounting, and room for popular speaker layouts.
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Add mid bass or components in the kicks for improved staging.
See Kick PanelsFactory speaker locations and typical sizes
Interiors changed in 1995, and locations vary by cab and trim. Use this as a starting point and verify your truck before ordering.
| Years | Common factory locations | Typical stock sizes | Notes |
|---|---|---|---|
| 1988-1991 | Dash pair, some trims add front doors, rear pillars on extended cab | Dash 4x6 inch, doors about 5.25 inch when equipped | Early years commonly list 4x6 inch dash and about 5.25 inch doors on some trims. |
| 1992-1994 | Dash pair and front doors on many trims, rear pillars on extended cab | Dash 4x6 inch, doors 5.25 to 6.5 inch depending on year and trim | Examples show 1992 and 1993 doors about 5.25 inch, 1994 doors commonly 6.5 inch. |
| 1995-1998 | Front doors, tweeter spots on some trims, rear pillars or rear doors by cab | Front doors commonly 6.5 inch, rear pillars often 4x6 inch, crew rear doors accept 5.25 or 6.5 or 6.75 inch | 1995 interior refresh put primary speakers in doors. Crew rear doors fit several round sizes. |
Tip: Cab style matters. Standard cabs usually have only the front set. Extended and crew cabs add rear pillars or rear doors. Always confirm your exact truck.
Upgrade paths with Fesler panels
Upgrading to Fesler panels is a direct path to better placement, cleaner lines, and more headroom for real speakers. You can run 6.5 inch coaxials or step up to components with tweeters at ear height. Add kick panels for mid bass support and improved imaging.
Recommended layouts
- Daily driver clarity: 6.5 inch coaxials in doors plus compact powered sub behind the seat.
- Component upgrade: 6.5 inch mid in the door plus a tweeter at the sail or A pillar, with a small DSP and amp.
- Kick panel assist: 6.5 inch in Fesler kicks to lift the stage and strengthen mid bass.
If you are keeping stock panels
- 1988-1994: Many trucks use 4x6 inch in the dash and 4x6 inch in rear pillars on extended cabs. Door speakers vary. Early years often list about 5.25 inch doors, and 1994 commonly lists 6.5 inch doors.
- 1995-1998: Most trucks use 6.5 inch in the front doors. Extended and crew models often have 4x6 inch in rear pillars. Crew cab rear doors accept a range of round sizes.
- Adapters and brackets: You can adapt some 4x6 inch locations to round sizes, and you can use rings for door upgrades where space allows.
- Plan the system: A modest four channel amp and a compact sub often improves clarity more than chasing oversized door drivers alone.
Quick install checklist
- Confirm cab style and exact year before ordering.
- Verify mounting depth and cutout before picking drivers.
- Replace brittle clips and refresh the moisture barrier when panels are off.
- Aim tweeters toward ear line when possible to avoid harsh reflections.
- After install, cycle windows fully to confirm no contact with the speaker basket.
Upgrade to Fesler Door Panels
Open up real speaker options and finish the cabin with a cleaner look.
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Door panels, kick panels, and accessories for 1988-2000 trucks.
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