2003 Express 2500 PCM IS 8125815650 | Programmed to Your VIN

Restore Your Van’s Performance

Fix your 2003 Express 2500’s running issues with this pre-programmed Powertrain Control Module (PCM). It solves no-start conditions, check engine lights, and poor performance. We program it to your VIN for a simple, plug-and-play installation. Get your workhorse back on the road fast!

$98.95

+11.99 USPS Priority Shipping

Availability: In stock



SKU: 590-06724-194 Categories: ,
Guaranteed Safe Checkout

Is Your 2003 Express 2500 Sidelined? Get it Running Right.

As a mechanic with over two decades of experience, I know the frustration of a work van that won’t cooperate. When your 2003 Chevy Express 2500 starts acting upโ€”whether it’s a no-start condition, erratic shifting, or a persistent Check Engine Light that no amount of parts-swapping can fixโ€”the problem often points directly to a failing Powertrain Control Module (PCM). This isn’t just a part; it’s the central command center for your engine and transmission, and when it goes, your van goes with it.

This isn’t a generic, off-the-shelf computer. This is a direct-replacement PCM, part number IS 8125815650, that we professionally program to your van’s specific Vehicle Identification Number (VIN). This critical step ensures all factory settings, security information (like the anti-theft system), and transmission shift points are perfectly matched to your vehicle, just as it came from GM.

Common Symptoms of a Failing 2003 Express 2500 PCM

If you’re experiencing any of the following, a faulty PCM is a likely culprit. I’ve seen these issues countless times in my bay, and a properly programmed module is the definitive fix.

  • โœ” Complete no-start or crank-no-start condition.
  • โœ” The Check Engine Light is on with communication error codes (like U-codes) or false sensor codes.
  • โœ” Harsh or unpredictable automatic transmission shifting.
  • โœ” Poor fuel economy and a noticeable loss of engine power.
  • โœ” Intermittent stalling or stumbling for no apparent reason.
  • โœ” Your diagnostic scan tool cannot communicate with the computer.

Real-World Diagnosis: A Customer’s Story
“A contractor’s 2003 Express 2500 came in on a tow truck last week with a classic crank-no-start symptom. His scanner couldn’t connect to the PCM at all. We quickly verified power and ground at the PCM connectorsโ€”they were solid. This told us the module itself had an internal failure, a common issue on these workhorses due to heat and vibration. We installed one of these pre-programmed units, performed the security relearn, and the van fired up instantly. He was back on the job the same afternoon without a costly trip to the dealership.”

Plug-and-Play Installation: No Dealer Visit Required

We take the guesswork and expense out of the repair. By programming the module before we ship it, we eliminate the need for specialized dealer tools. While a simple security relearn procedure may be required (which you can do yourself), you avoid towing fees and high labor costs. Here’s the typical installation process:

  1. Safety First: Disconnect the negative terminal from your vehicle’s battery.
  2. Locate the PCM: On the 2003 Express Van, the PCM is located in the engine compartment, typically on the driver’s side rear.
  3. Disconnect Connectors: Carefully unclip and remove the wiring harness connectors from the old module.
  4. Remove Old Module: Unbolt the old PCM from its mounting bracket.
  5. Install New Module: Bolt your new, pre-programmed PCM into place.
  6. Reconnect Everything: Firmly re-seat the wiring harness connectors until they click. Reconnect the negative battery terminal.
  7. Perform Security Relearn: In most cases, you will need to perform a simple 10-30 minute key-cycle procedure to sync the new PCM with your vehicle’s anti-theft system. We provide instructions for this.

Guaranteed Compatibility

This module is a direct replacement for a wide range of GM vehicles from this era and is compatible with numerous service numbers. Simply provide your VIN at checkout, and we’ll handle the rest, ensuring a perfect match.

Replaces Part Numbers: 12581565, IS 8125815650, 12570557, 12570558, 12576106, 12576869, 12578127, 8125781270, 88864822, 89017733

Fits a wide variety of 2003-2004 GM Trucks, Vans, and SUVs. Please verify your part number or contact us with your VIN to confirm fitment.

Conditions & Options

Programmed to your VIN GM: 12576106

Genuine OEM

Yes

MPN

is-8125815650

Interchange part number

Condition

Refurbished

Model

EXPRESS 2500 VAN

Year

2003

Brand

GM

Manufacturer Part Number

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GTIN

Does not apply

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