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ILLINOIS · MAIL-IN SERVICE

GPEC2 / 2A / 3 / 4 / 4LM PCM Unlocking in Illinois

Ship your module from Chicago or anywhere in Illinois — we complete the work in 24 hours and ship it back at the return speed you choose at checkout — standard to overnight.

$250 flat 24-Hour Turnaround ~2 day USPS from IL
Text Before You Buy

Why Illinois customers mail in gpec2 / 2a / 3 / 4 / 4lm pcm unlocking

Illinois has roughly 10.5 million registered vehicles, and trucks, SUVs & imports make up much of what Chicago-area shops and owners mail us. Domestic work like gpec2 / 2a / 3 / 4 / 4lm pcm unlocking runs high-volume across Illinois — we see a steady stream out of Chicago, Aurora, Rockford. Cross-region north — about 2 days each way.

Metros we serve in Illinois

ChicagoAuroraRockfordNaperville

Illinois at a glance

  • ~10.5M registered vehicles statewide
  • Most common: trucks, SUVs & imports
  • Illinois requires emissions testing in the Chicago and Metro-East St. Louis areas; downstate counties are exempt.

What you get

  • Module unlocked — tuner software (HP Tuners, EFILive, DiabloSport, Hemituner) can now read + write
  • Original locked-state data archived 90 days
  • No tuning performed — we leave the calibration stock (you tune as you wish after)
  • 24-hour bench turnaround
  • Return shipping your choice at checkout — standard, 2-day, or overnight
  • Photo of completed work

Shipping timeline — Illinois ↔ Arlington TX

USPS Priority routes north through the Central network; typically 2 days. Typical round-trip from Chicago or anywhere in Illinois:

  1. Day 0

    You ship

    USPS Priority from IL, ~$11

  2. Day 2

    We receive

    Workshop opens + inspects

  3. Day 3

    Work done

    24-hour bench turnaround

  4. ~Day 5

    Back to you

    Return speed you chose at checkout

Illinois FAQ

Common questions from customers shipping from Illinois.

How long does shipping take from Illinois to your Arlington TX workshop?
USPS Priority Mail from Chicago, IL reaches our Arlington workshop in about 2 business days. USPS Priority routes north through the Central network; typically 2 days. We start work the same day your module arrives and ship back next business day at the return speed you chose at checkout.
How much does it cost to ship a module from Illinois?
USPS Priority flat-rate from Illinois to Arlington TX runs about $11. The customer pays shipping to us; return shipping back to Illinois is selected at checkout — $14.95 standard (3-5 business days), $29.95 UPS 2-Day, or $74.95 UPS Next Day Air, flat nationwide. Cross-region north — about 2 days each way.
Do you accept gpec2 / 2a / 3 / 4 / 4lm pcm unlocking modules from Illinois?
Yes — we receive modules from Chicago, Aurora, Rockford, Naperville and the rest of Illinois regularly. With about 10.5 million registered vehicles statewide, trucks, SUVs & imports are the bulk of what we see from Illinois.
Is there a gpec2 / 2a / 3 / 4 / 4lm pcm unlocking shop in Chicago I should use instead?
Most Chicago shops don't keep the bench equipment for gpec2 / 2a / 3 / 4 / 4lm pcm unlocking — they'd forward the module to a specialist anyway, which adds a markup and a middleman. Going direct to us is usually faster and cheaper. Cross-region north — about 2 days each way.
Does Illinois vehicle inspection or emissions testing affect this service?
Illinois requires emissions testing in the Chicago and Metro-East St. Louis areas; downstate counties are exempt. Our service is bench module programming only — you remain responsible for your vehicle's compliance with all Illinois and federal requirements.
Is this legal?
Yes for off-road / racing / non-emissions-vehicle use. Modifying the calibration of an emissions-regulated vehicle for street use violates EPA Clean Air Act regulations. We don't tune; that decision is on you.
Do you tune the module too?
No — we only unlock it. Tuning is a separate skill set and we deliberately stay out of the calibration / dyno-tuning business. After we unlock, you (or your tuner) flash whatever calibration you want using HP Tuners, EFILive, DiabloSport, or similar.

Full details

See the complete GPEC2 / 2A / 3 / 4 / 4LM PCM Unlocking service page

Compatibility list, what it fixes / doesn't fix, shipping instructions, warranty.

Full Service Page

Same service from other states:

AlabamaAlaskaArizonaArkansasCaliforniaColoradoConnecticutDelawareFloridaGeorgiaHawaiiIdahoIndianaIowaKansasKentuckyLouisianaMaineMarylandMassachusetts

Ship from Illinois today

Pay now, get the Arlington TX shipping address by email, drop it in the mail. Full round-trip from Chicago: about a week.

(817) 678-3252