Programmed 2003 GMC Safari PCM 12576869 | VIN Matched

Is Your 2003 GMC Safari Running Rough, Stalling, or Refusing to Start?

If you’re dealing with frustrating engine problems in your 2003 GMC Safari, a failing Powertrain Control Module (PCM) is often the culprit. Over my 20+ years turning wrenches, I’ve seen hundreds of these GM vans and trucks exhibit the same confusing symptoms: erratic idling, poor fuel mileage, harsh shifting, or a persistent Check Engine Light that won’t go away. The PCM is the brain of your vehicle, and when it starts to fail, it can feel like the entire system is falling apart.

This isn’t just another part; it’s the core solution to get your reliable workhorse back on the road. We are offering a direct-fit Powertrain Control Module, service part number 12576869, that comes fully programmed to your specific vehicle. Forget expensive dealership visits and towing fees. We handle the complex programming for you before we ship.

The Simple, Reliable Solution: A Pre-Programmed PCM

The biggest headache with replacing a PCM has always been the programming. In the past, you’d have to install the module and then have the vehicle towed to a dealer for a costly flashing procedure. We eliminate that step entirely. Here’s how it works:

1. You purchase this module.
2. You provide us with your vehicle’s 17-digit VIN (Vehicle Identification Number).
3. Our technicians use official GM software to load the latest, most stable calibration specifically for your 2003 GMC Safari.
4. We ship you a module that is ready for installation right out of the box.

Common Symptoms of a Failing 2003 GMC Safari PCM

If your van is experiencing any of the following, a faulty computer is a likely cause:

• ✔ Check Engine Light is on with various communication or sensor codes.
• ✔ The engine cranks but refuses to start.
• ✔ Unexplained stalling, especially when warm.
• ✔ Rough or inconsistent engine idle.
• ✔ Noticeable decrease in fuel economy.
• ✔ Transmission not shifting correctly or getting stuck in gear.
• ✔ No communication with your OBDII scan tool.

Easy Installation to Get You Back on the Road

You don’t need to be a master technician to install this module. With basic hand tools, you can have your Safari running smoothly again in under an hour.

1. Safety First: Disconnect the negative terminal from your vehicle’s battery.
2. Locate the PCM: On your 2003 GMC Safari, the PCM is located in the engine compartment on the driver’s side, near the battery.
3. Disconnect Connectors: Carefully unlatch and remove the electrical wiring harness connectors from the old module. Inspect the pins for any corrosion or damage.
4. Remove the Old Module: Unbolt the old PCM from its mounting bracket.
5. Install the New Module: Bolt your new, pre-programmed PCM into place and securely reconnect the wiring harnesses. Ensure they click into place.
6. Reconnect Battery: Reattach the negative battery terminal. The vehicle is now ready to start. No further programming is required.

Guaranteed Compatibility

This module is a direct replacement for part number 12576869 and is interchangeable with a wide range of GM service numbers. Your module will be programmed specifically for your VIN, ensuring perfect function. This hardware is also used on many other GM vehicles, including:

• Chevrolet: Express 1500/2500/3500 Vans, Silverado 1500/2500/3500 Pickups, Suburban 2500, Avalanche 2500, S10, Blazer, Astro, Corvette
• GMC: Savana 1500/2500/3500 Vans, Sierra 1500/2500/3500 Pickups, Yukon XL 2500, S15/Sonoma, Jimmy S15
• Cadillac: CTS (2004)

Replaces Service Numbers: 12581565, 8125815650, 12570557, 12570558, 12576106, 12578127, 8125781270, 88864822, 89017733