Guardian / Part reference

Guardian GUDT-308 opener cover

The Guardian 600SL manual (6-13; GSOMU01A-1) identifies GUDT-308 as the opener cover and requires replacement by a qualified technician. The October 2024 book separately lists it under 628. Keep the exact source scopes and the 600SL AC 120 V / 60 Hz edition condition.

US source scopeUpdated 2026-09-15Independent Anderson reference

Match the whole number.

Manufacturer identifier: GUDT-308. Keep every character when comparing it with your label or paperwork. A similar number does not establish the same component.

Guardian replacement-parts book, cover dated October 1, 2024DOCX native table 30, row 7, column group 1; exact model heading 628; assembly item 8 · checked 2026-09-12 · Cover dated October 1, 2024 · Guardian
Guardian 600SL manual: reviewed parts and hardware inventoryPDF page 26 / printed page 26, Opener Assembly Parts table item 8, exact Part No. row · checked 2026-09-12 · 6-13; GSOMU01A-1 · Guardian

Values apply to the exact identifier and scope in the cited source.
Book description (observed model headings 628; listing context only)	opener cover View source and citation details Guardian replacement-parts book, cover dated October 1, 2024DOCX native table 30, row 7, column group 1; exact model heading 628; assembly item 8 · checked 2026-09-12 · Cover dated October 1, 2024 · Guardian
Source revision	Cover dated October 1, 2024 View source and citation details Guardian replacement-parts book, cover dated October 1, 2024DOCX native table 30, row 7, column group 1; exact model heading 628; assembly item 8 · checked 2026-09-12 · Cover dated October 1, 2024 · Guardian
600SL / 6-13; GSOMU01A-1: component function (600SL, 6-13)	opener cover View source and citation details Guardian 600SL manual: reviewed parts and hardware inventoryPDF page 26 / printed page 26, Opener Assembly Parts table item 8, exact Part No. row · checked 2026-09-12 · 6-13; GSOMU01A-1 · Guardian
600SL / 6-13; GSOMU01A-1: applicability note 1 (600SL, 6-13)	The assembly-parts table requires replacement by a qualified technician. View source and citation details Guardian 600SL manual: reviewed parts and hardware inventoryPDF page 26 / printed page 26, Opener Assembly Parts table item 8, exact Part No. row · checked 2026-09-12 · 6-13; GSOMU01A-1 · Guardian
600SL / 6-13; GSOMU01A-1: applicability note 2 (600SL, 6-13)	The reviewed 600SL edition specifies AC 120 V / 60 Hz on printed page 4. Applicability to other electrical editions is not established. View source and citation details Guardian 600SL manual: reviewed parts and hardware inventoryPDF page 26 / printed page 26, Opener Assembly Parts table item 8, exact Part No. row · checked 2026-09-12 · 6-13; GSOMU01A-1 · Guardian
600SL / 6-13; GSOMU01A-1: applicability note 3 (600SL, 6-13)	This is the exact 600SL manual with printed revision 6-13 and code GSOMU01A-1. Current stock, later revisions, other models and cross-part pairings are not established. View source and citation details Guardian 600SL manual: reviewed parts and hardware inventoryPDF page 26 / printed page 26, Opener Assembly Parts table item 8, exact Part No. row · checked 2026-09-12 · 6-13; GSOMU01A-1 · Guardian

Documented fitment & exclusions

Read the exact equipment or component, market, production and variant limits in every row. An omitted pairing has not been verified by this reference.

Source statements and their exact conditions. Use the checker below to compare equipment or a component.
Equipment or component / relationship	Evidence and conditions
628 Documented compatibility From GUDT-308 to 628.	Conditional Additional source conditions or an adapter must be checked before confirming compatibility. Details still needed source conditions Use the exact label and the source scope below. An unanswered condition keeps this result conditional or unverified. GUDT-308 is listed directly under model 628 in the cover dated October 1, 2024 parts book; confirm source revision and exact configuration. Applies only within this source scope Market: US Model scope: 628 Exact model 628 listing in the replacement-parts book: Cover dated October 1, 2024. Confirm the exact part and installed configuration; a listing does not establish interchangeability with another revision, model or similarly named item. The source footnote for this assembly table requires replacement by a qualified technician. Guardian replacement-parts book, cover dated October 1, 2024DOCX native table 30, row 7, column group 1; exact model heading 628; assembly item 8 · checked 2026-09-12 · Cover dated October 1, 2024 · Guardian Guardian replacement-parts book, cover dated October 1, 2024DOCX native table 30, row 7, column group 1; exact model heading 628; assembly item 8; qualified-technician footnote immediately following native assembly table 30 · checked 2026-09-12 · Cover dated October 1, 2024 · Guardian
600SL Documented compatibility From GUDT-308 to 600SL.	Conditional Additional source conditions or an adapter must be checked before confirming compatibility. Details still needed source conditions Use the exact label and the source scope below. An unanswered condition keeps this result conditional or unverified. GUDT-308 is listed in the exact 600SL manual. The source revision and all stated conditions apply. Applies only within this source scope Market: US Model scope: 600SL The assembly-parts table requires replacement by a qualified technician. The reviewed 600SL edition specifies AC 120 V / 60 Hz on printed page 4. Applicability to other electrical editions is not established. This is the exact 600SL manual with printed revision 6-13 and code GSOMU01A-1. Current stock, later revisions, other models and cross-part pairings are not established. Guardian 600SL manual: reviewed parts and hardware inventoryPDF page 26 / printed page 26, Opener Assembly Parts table item 8, exact Part No. row · checked 2026-09-12 · 6-13; GSOMU01A-1 · Guardian

Direct replacement paths

No direct successor for GUDT-308 is verified in this reference.

A direct replacement statement does not establish reverse interchangeability, a kit equivalent or a later replacement chain.

Compare exact equipment or a component.

Check a part or accessory pairing

Part or accessory brand

Narrow part or accessory choices by the complete number (optional)

Loading part or accessory choices…

Part or accessory

Selected: GUDT-308 · Read its reference. Selection identifies a record; it does not confirm fitment.

Equipment or accessory brand

Choose the equipment or accessory brand separately from the component brand. A missing identifier is unverified. Use the model library to identify your equipment and its source documents.

An accessory pairing, including a receiver or wall console, applies only to the exact listed pair and source conditions. It does not establish suitability for your installed opener or compatibility through another device.

Choose the equipment or accessory brand to load its published identifiers.

Equipment market

Production date, if known

Use the production date on the label or records, not the purchase date. Leave blank if unknown.

Use part and model numbers only. Never enter a serial number, PIN or access code. Your entry is used for this lookup and is not put in the page address, saved in browser storage or sent to analytics.

Choose a task and enter or select an exact identifier.

Recall references

No recall reference is included for this identifier in the published dataset. This is not a safety clearance or proof that no recall exists.

Sources & scope

Guardian 600SL manual: reviewed parts and hardware inventoryGuardian · US · checked 2026-09-12 · 6-13; GSOMU01A-1
Guardian replacement-parts book, cover dated October 1, 2024Guardian · US · checked 2026-09-12 · Cover dated October 1, 2024

Anderson prepared this reference from the listed evidence. Source statements are not an Anderson installation inspection or independent product test. Official documents stay on their publisher’s website.

Related equipment guides

Confirm a missing detail

Use Guardian official support and match the complete part number, equipment model and production details with the source scope.

Use safely accessible labels and existing paperwork. Do not remove powered covers or adjust springs or cables to identify a component.

This is an independent Anderson reference. Manufacturer names identify the equipment and do not imply affiliation or authorized-dealer status.

A reference listing does not establish current stock, a price, eligibility for manufacturer support or that a component is faulty.