Key takeaways
- Match the NAIC on the declarations page to the paper table below. Same brand, several legal names.
- First-party is your policy (including UM/UIM). Third-party is theirs. Those are different files.
- Official FNOL: 800-228-8040 · orgreatwest.com/why-great-west/claims-services. That is their claims door, not ours.
- A Division complaint is separate. We do not file it for you.
Great West is commercial truck
Great West Casualty Company (11371) writes commercial truck, not personal auto. Great Western Insurance Company (71480) is a life lookalike. Injury files after a truck crash start at Denver truck accident. Official claims line 800-228-8040. Source: orgreatwest.com claims services.
Paper companies that are this brand
Rows are copied from the Division's monthly registered-agent list dated 2026-09-01. Registered agent is Colorado service of process, not the claims office. CSC in Littleton and CT in Centennial are shared by hundreds of unrelated companies. Empty street fields stay empty — we do not invent a Colorado address. If DOI prints DEFAULT and an out-of-state city, we print that too.
Great West Casualty motor-vehicle paper
| NAIC | Legal name | Registered agent | Street | City / ZIP | Lines | CO effective |
|---|---|---|---|---|---|---|
| 11371 | Great West Casualty Company | CORPORATION SERVICE COMPANY | 1900 W LITTLETON BLVD | LITTLETON, CO 80120-2023 | Motor Vehicle (Casualty), Fidelity and Surety, General Casualty, Workers' Compensation, Crop, Motor Vehicle (Property), General Property | 2025-10-15 |
Lookalikes that are not this brand
Do not treat as this claim
| NAIC | Legal name | Registered agent | Street | City / ZIP | Lines | CO effective | Why not |
|---|---|---|---|---|---|---|---|
| 71480 | Great Western Insurance Company | CORPORATION SERVICE COMPANY | 1900 W LITTLETON BLVD | LITTLETON, CO 80120-2023 | General Life | 2022-10-20 | life company — not Great West Casualty 11371 |
First-party versus third-party on this crash
If Great West Casualty insures the other driver, you are a third-party claimant on their liability policy. If Great West Casualty is on your own declarations page, you may also have UM/UIM, MedPay, or collision on a first-party file. Those jobs are not the same. UIM lives on our Colorado UIM guide. Fault share lives on comparative negligence. The process timeline lives on the claim process page. We do not rewrite those here.
How to report — and when that is enough
Official trucking claims-services page: 800-228-8040, 24/7 US and Canada. This is commercial truck, not a personal-auto writer. Phone 800-228-8040. (source: official page). A shop supplement or a short rental bill often does not need a lawyer. Quote shopping never does. A stuck injury claim, a coverage fight on your own UM/UIM, or a named carrier that will not move after the records are in is the job we take. Car-value fights start at lowball offers.
License verify and a Division complaint
Confirm the NAIC is licensed in Colorado through the Sircon consumer inquiry. Complaints start on the Division file-a-complaint page. Consumer Services 303-894-7490 / 800-930-3745 (outside Denver metro), M–F 8–5. We are not the Division.
Stuck on a Great West Casualty claim after a crash? Free case review.
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