---
title: "Juan Guerrero — Clean Truck Check, Hammond, IN | CTC Finder"
description: "Juan Guerrero in Hammond, IN is on CARB's Clean Truck Check tester list. Offers OBD testing, smoke opacity (non-OBD) testing. Phone, address and nearby testers."
url: "https://ctcfinder.com/tester/juan-guerrero-hammond-in/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Juan Guerrero

Clean Truck Check tester in Hammond, IN.

> 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 | Hammond, IN 46324 |
| Phone | (708) 475-3650 |
| Mobile testing | No |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | No |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Juan Guerrero 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 | Yes |
| California-registered motorhome | Same test as above by engine year, once a year | Not listed |

If you need a tester at your yard, the nearest listed tester that offers mobile testing is Atlas Truck Center in Harvey, about 8 miles away. [See listing](https://ctcfinder.com/tester/atlas-truck-center-harvey-il/).

## Clean Truck Check testers in Indiana

Juan Guerrero is one of 11 testing businesses in Indiana on CARB's public tester list. 9 of them offer mobile testing and 3 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 Juan Guerrero offer mobile Clean Truck Check testing?

Not according to CARB's tester list; plan to bring the truck to the tester. The nearest listed mobile tester is [Atlas Truck Center](https://ctcfinder.com/tester/atlas-truck-center-harvey-il/) (about 8 miles).

### Can Juan Guerrero test a 2012 or older diesel truck?

Yes. Juan Guerrero lists smoke opacity testing, the test CARB requires for diesel trucks of model year 2012 and older (no OBD). See [OBD vs smoke opacity](https://ctcfinder.com/guide/obd-vs-smoke-opacity-test/).

### How much does Juan Guerrero charge for a Clean Truck Check?

Juan Guerrero has not published prices with us; call (708) 475-3650 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 Juan Guerrero a CARB-credentialed tester?

Juan Guerrero 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

- **[Atlas Truck Center](https://ctcfinder.com/tester/atlas-truck-center-harvey-il/)** — 15101 Commercial Ave, Harvey, IL 60426 — (815) 854-8899 — 8 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Central Truck Repair](https://ctcfinder.com/tester/central-truck-repair-markham-il/)** — 2125 West 162Nd Street, Markham, IL 60428 — (914) 512-6179 — 10 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Ontime Truck and Trailer LLC](https://ctcfinder.com/tester/ontime-truck-and-trailer-llc-crestwood-il/)** — 3955 135Th Street, Crestwood, IL 60418 — (419) 973-4484 — 13 mi. Services: mobile testing, OBD testing.
- **[Cheetah Repair Services Inc](https://ctcfinder.com/tester/cheetah-repair-services-inc-mokena-il/)** — 11109 W 189th Pl, Mokena, IL 60448 — (331) 444-9282 — 20 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Red Mechanic Shop Corp](https://ctcfinder.com/tester/red-mechanic-shop-corp-mokena-il/)** — 8450 W 191st St Ste 14, Mokena, IL 60448 — (779) 707-9777 — 20 mi. Services: OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[FIXSTAR, Rafael](https://ctcfinder.com/tester/fixstar-rafael-bedford-park-il/)** — 7050 S. Archer Rd., Bedford Park, IL 60458 — (773) 491-8713 — 20 mi. Services: mobile testing, OBD testing, motorhome testing.