Is Your 2003 Savana Van Experiencing Driveability Problems?
If your 2003 GMC Savana 2500 is suffering from issues like a persistent check engine light, erratic shifting, stalling, or a sudden drop in fuel economy, a failing Powertrain Control Module (PCM) is a very likely culprit. The PCM is the central computer of your vehicle, managing everything from the fuel injectors and ignition timing to the transmission shift points. When it begins to fail, it can cause a wide range of frustrating and difficult-to-diagnose symptoms, leaving your reliable workhorse van sidelined.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light with codes such as P0601, P0602, P0606, or other communication-related faults.
- ✔ The engine cranks but refuses to start, or starts and immediately stalls.
- ✔ Unexplained drops in fuel mileage and overall poor engine performance.
- ✔ Harsh, erratic, or delayed automatic transmission shifting.
- ✔ Engine misfires, stumbling, or hesitation during acceleration.
- ✔ Your diagnostic scan tool is unable to communicate with the PCM.
The Direct-Fit Solution: A Programmed 2003 Savana 2500 PCM
Don’t settle for a generic, unprogrammed module that creates more problems than it solves. This Powertrain Control Module for your 2003 Savana 2500 is a complete, ready-to-install solution. We take the guesswork out of the repair by pre-programming the unit using your vehicle’s specific Vehicle Identification Number (VIN). This ensures that the module has the correct software and calibrations for your van’s engine, transmission, and factory options. We flash it with the latest, most stable software updates available from GM, which can often resolve underlying drivability issues that were present even before the original module failed.
Simple Process, Professional Results
Our process is designed to get you back on the road quickly:
- Place Your Order: Purchase the PCM for your vehicle.
- Provide Your VIN: After your purchase, you will need to provide us with your 17-digit VIN. This is crucial for correct programming.
- We Program & Ship: Our technicians will flash the module with your vehicle’s specific data and the latest GM updates before shipping it directly to you.
Upon installation, you or your mechanic may need to perform a simple security relearn procedure (often called a key relearn) and a Crankshaft Variation (CASE) relearn. These are standard procedures required anytime a PCM is replaced on these vehicles and can be completed with a capable bi-directional scan tool.
Guaranteed Compatibility
This module, part number 88864822, is a direct replacement for several original equipment service numbers, ensuring a perfect fit and function. It is compatible with service numbers: 12581565, 12570557, 12570558, 12576106, 12576869, 12578127, 89017733, and others. It is the correct computer for a wide range of 2003 and 2004 GM trucks, vans, and SUVs, including:
- 2003 GMC Savana / Chevrolet Express 1500, 2500, 3500 Vans
- 2003 GMC Sierra / Chevrolet Silverado 1500, 2500, 3500 Pickups (with 4.3L or 8.1L gasoline engines)
- 2003 GMC Yukon XL 2500 / Chevrolet Suburban 2500 (with 8.1L)
- 2003 Chevrolet Avalanche 2500
- 2003 GMC Safari / Chevrolet Astro
- 2003 GMC Sonoma / Chevrolet S10 / GMC Jimmy / Chevrolet Blazer (with 4.3L)
- 2004 Cadillac CTS & Chevrolet Corvette (matching ID 12581565)
Restore the performance and reliability of your vehicle with this professionally programmed 2003 Savana 2500 PCM. Order today and get your truck back to work.
Frequently Asked Questions
Do I need to program this module?
No. We handle the programming for you before shipment. Simply provide your vehicle’s 17-digit VIN during or after checkout, and the module will arrive flashed with the latest GM software specific to your van.
What is a CASE relearn and is it required?
A Crankshaft Variation (CASE) Relearn synchronizes the new PCM with your engine’s crankshaft position sensor. It is often required after installation to prevent a P1336 trouble code and ensure accurate misfire detection. This procedure must be performed with a compatible high-level scan tool.
Is this part difficult to install?
The physical installation is straightforward. On the 2003 Savana 2500, the PCM is located in the left-hand (driver’s side) rear of the engine compartment. The main steps involve disconnecting the battery, unplugging the electrical connectors, and unbolting the module. The most critical post-installation steps are the security and CASE relearn procedures.
Is this a plug-and-play part?
Because it comes pre-programmed to your VIN, it is as close to plug-and-play as possible. However, due to GM’s anti-theft systems, a security relearn is almost always necessary to allow the vehicle to start. A CASE relearn may also be required. These are standard industry procedures for this type of repair.
What information do you need from me?
We require your complete 17-digit Vehicle Identification Number (VIN). This allows us to load the exact factory calibration for your vehicle’s specific engine, transmission, and emissions equipment, ensuring a perfect functional match.