2003 Express 1500 Van Powertrain Control Module PCM 12570558

Is your 2003 Chevrolet Express 1500 Van running rough, stalling, or refusing to start? Are you battling a persistent Check Engine Light with confusing error codes? The Powertrain Control Module (PCM), the electronic brain of your vehicle’s engine and transmission, is often the culprit behind these frustrating issues. This replacement PCM, part number 12570558, is the definitive solution to restore your van’s reliability and performance. It arrives at your door fully programmed with the latest official GM software, specifically matched to your vehicle’s unique Vehicle Identification Number (VIN).

Is Your Van Exhibiting These Symptoms?

A failing PCM can cause a wide range of problems that can be difficult to pinpoint. If your Express Van is experiencing any of the following, a faulty module is a likely cause:

• ✔ Persistent Check Engine Light (CEL) illumination
• ✔ Engine stalling, stumbling, or misfiring
• ✔ Drastic decrease in fuel economy
• ✔ Harsh or erratic automatic transmission shifting
• ✔ Complete no-start condition where the engine cranks but won’t fire
• ✔ Communication errors with diagnostic scan tools
• ✔ Failure to pass state emissions testing

The Solution: A VIN-Programmed 2003 Express 1500 PCM

This isn’t just a generic, off-the-shelf part. We take the guesswork out of the repair process. When you order, you provide us with your van’s VIN. Our technicians then flash the module with the most current, stable software directly from GM for your specific vehicle configuration. This ensures that all factory parameters for fuel delivery, ignition timing, transmission shift points, and emissions controls are perfectly calibrated. The result is a seamless, plug-and-play installation that restores your vehicle to its original operating condition without requiring expensive trips to the dealership for programming.

This module is a direct replacement for service number 12570558 and is also compatible with a wide range of other GM part numbers, including: 12581565, 12570557, 12576106, 12576869, 12578127, 88864822, and 89017733. This broad compatibility makes it a versatile solution for many GM trucks and vans from that era.

Guaranteed Fitment & Compatibility

While this listing is for the 2003 Express 1500 PCM, this module is also a confirmed fit for a variety of other GM vehicles. Please verify your part number and check the list below to ensure compatibility:

• ASTRO 03: Electronic Control Module; (LH front by battery)
• AVALANCHE 2500 03: Electronic Control Module; (LH front under battery)
• BLAZER S10/JIMMY S15 03: Electronic Control Module; (RH front engine compartment)
• CORVETTE 04: Electronic Control Module; (RH engine compartment), ID 12581565
• CTS 04: Electronic Control Module; (RH engine compartment), Base, ID 12581565
• EXPRESS 1500/2500/3500 VAN 03: Electronic Control Module; (LH rear engine compartment)
• S10/S15/SONOMA 03: Electronic Control Module; (RH front engine compartment), 4.3L
• SAFARI (GMC) 03: Electronic Control Module; (LH front by battery)
• SAVANA 1500/2500/3500 VAN 03: Electronic Control Module; (LH rear engine compartment)
• SIERRA 1500 PICKUP 03: Electronic Control Module; (LH front under battery), w/4.3L
• SIERRA 2500/3500 PICKUP 03: Electronic Control Module; (LH front under battery), gasoline, 8.1L
• SILVERADO 2500/3500 PICKUP 03: Electronic Control Module; (LH front under battery), gasoline, 8.1L
• SUBURBAN 2500 03: Electronic Control Module; (LH front under battery), 8.1L
• YUKON XL 2500 03: Electronic Control Module; (LH front under battery), 8.1L