---
title: "Solid Group Inc — Clean Truck Check, Willowbrook, IL"
description: "Solid Group Inc in Willowbrook, IL is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing. Phone, address and nearby testers."
url: "https://ctcfinder.com/tester/solid-group-inc-willowbrook-il/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Solid Group Inc

Clean Truck Check tester in Willowbrook, IL.

> CTC Finder is an independent directory, not affiliated with CARB. Tester data: CARB Clean Truck Check public tester list, last checked November 1, 2026. Confirm services, hours and prices with the tester.

| Field | Value |
|---|---|
| Location | 50 75th St, Willowbrook, IL 60527 |
| Phone | (630) 677-2267 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | No |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Solid Group Inc can test

| Your vehicle | Test required | This tester |
|---|---|---|
| Diesel, model year 2013 or newer | OBD scan | Yes |
| Alternative fuel (natural gas, propane), 2018 or newer | OBD scan | Yes |
| Diesel, model year 2012 or older (no OBD) | Smoke opacity test (SAE J1667) plus visual inspection | Not listed |
| California-registered motorhome | Same test as above by engine year, once a year | Not listed |

For a 2012 or older diesel, the nearest listed tester with smoke opacity testing is Mordo Repairs Inc in Lemont, about 5 miles away. [See listing](https://ctcfinder.com/tester/mordo-repairs-inc-lemont-il/).

## Clean Truck Check testers in Illinois

Solid Group Inc is one of 65 testing businesses in Illinois on CARB's public tester list. 44 of them offer mobile testing and 19 do smoke opacity tests.

## When your truck is due

Most trucks test twice a year, on a schedule tied to the DMV registration expiration date. CARB says OBD trucks move to four tests a year beginning October 2027. California-registered (non-commercial) motorhomes and agricultural vehicles test once a year. See the [deadline guide](https://ctcfinder.com/guide/deadlines-2026-2027/). You can test up to 90 days before a deadline. Free email reminders: https://ctcfinder.com/reminders/

## Frequently asked questions

### Does Solid Group Inc offer mobile Clean Truck Check testing?

Yes. Solid Group Inc says on CARB's tester list that it offers mobile testing, so it can come to your yard or job site. Ask about a trip fee when you call.

### Can Solid Group Inc test a 2012 or older diesel truck?

Solid Group Inc does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [Mordo Repairs Inc](https://ctcfinder.com/tester/mordo-repairs-inc-lemont-il/) (about 5 miles). Trucks from 2013 on get an OBD scan instead.

### How much does Solid Group Inc charge for a Clean Truck Check?

Solid Group Inc has not published prices with us; call (630) 677-2267 for a quote. Published California prices are usually $50–$135 per vehicle for an OBD test and $190–$200 for a smoke opacity test, plus CARB's annual fee ($32.13 in 2026). See the [cost guide](https://ctcfinder.com/guide/cost/).

### Is Solid Group Inc a CARB-credentialed tester?

Solid Group Inc appears on CARB's public Clean Truck Check tester list, last checked November 1, 2026. Only credentialed testers can submit results to CARB; after the test, confirm the passing result shows for your vehicle in CTC-VIS.

## Other testers nearby

- **[AV Towing & Repair Inc](https://ctcfinder.com/tester/av-towing-and-repair-inc-burr-ridge-il/)** — 11S224 S Madison St, Burr Ridge, IL 60527 — (630) 703-6956 — 1 mi. Services: mobile testing, OBD testing.
- **[Mordo Repairs Inc](https://ctcfinder.com/tester/mordo-repairs-inc-lemont-il/)** — 32 Oak Ct, Lemont, IL 60439 — (630) 754-9569 — 5 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing.
- **[FIXSTAR, Rafael](https://ctcfinder.com/tester/fixstar-rafael-bedford-park-il/)** — 7050 S. Archer Rd., Bedford Park, IL 60458 — (773) 491-8713 — 5 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Max Carriers](https://ctcfinder.com/tester/max-carriers-summit-argo-il/)** — 5200 W Lawndale Ave, Summit Argo, IL 60501 — (708) 639-5595 — 6 mi. Services: OBD testing.
- **[ABA Carriers INC](https://ctcfinder.com/tester/aba-carriers-inc-bolingbrook-il/)** — 537 East South Frontage Road 202, Bolingbrook, IL 60440 — (708) 603-1100 — 8 mi. Services: mobile testing, OBD testing.
- **[Credential Tester](https://ctcfinder.com/tester/credential-tester-naperville-il/)** — 2723 Wendy Dr, Naperville, IL 60565 — (630) 808-8242 — 10 mi. Services: OBD testing, smoke opacity (non-OBD) testing, motorhome testing.