Restore Your Truck’s Performance and Reliability
Is your GMC Sierra, Silverado, or other GM truck plagued by frustrating issues like a persistent check engine light, erratic shifting, or a no-start condition? These are classic signs of a failing Powertrain Control Module (PCM), the central computer of your vehicle. When the PCM malfunctions, it can throw your engine’s performance, fuel economy, and transmission behavior into chaos. This replacement PCM, part number 89017750, is the definitive solution to get your truck running right again. We take the guesswork and hassle out of the repair by programming the module specifically to your vehicle’s VIN with the latest GM software updates before it even ships. This ensures a seamless installation and restores the precise factory-calibrated operation your truck was designed for.
Case Study: A Tricky Diagnosis
I remember a 2005 Silverado 2500 that came into my bay with what the owner was convinced was a failing transmission. It was shifting hard between 1st and 2nd and sometimes wouldn’t shift at all. He had already spent a small fortune replacing shift solenoids based on another shop’s advice, but the problem persisted. After hooking up my high-level scanner, I noticed communication errors and an internal processor fault code (P0606) from the PCM. The PCM wasn’t sending the correct signals to the transmission. We installed a VIN-programmed 2003-2007 Sierra 2500 PCM, and the truck shifted perfectly. It wasn’t a transmission problem at all; it was the brain telling it what to do. This part saves you from chasing expensive and incorrect repairs.
Common Signs of a Failing PCM
- ✔ Check Engine Light is on with codes like P0601 (Internal Control Module Memory Check Sum Error), P0606 (PCM Processor Fault), or other communication codes.
- ✔ Your vehicle fails to start or starts intermittently.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Engine stalling, misfiring, or running rough for no apparent reason.
- ✔ Communication loss with the scan tool or other modules.
A Straightforward Guide to Installation
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 15 minutes to allow all system capacitors to discharge.
- ✔ Locate the PCM: On most compatible GM trucks and SUVs, the PCM is located in the engine bay on the driver’s side, often under or next to the battery tray.
- ✔ Disconnect Connectors: Carefully release the locking tabs and unplug the wiring harness connectors from the old PCM. Inspect the connectors for any corrosion or damage.
- ✔ Remove the Old Module: Unbolt the old PCM from its mounting bracket. Keep the hardware as you may need it for the new module.
- ✔ Install the New PCM: Mount your new, pre-programmed PCM into the bracket and securely plug in the wiring harness connectors. You should hear a click as they lock into place.
- ✔ Reconnect Battery: Reattach the negative battery terminal.
- ✔ Perform Security Relearn (If Necessary): While this module is programmed to your VIN, some GM vehicles require a simple security relearn procedure. This typically involves turning the key to the ‘ON’ position for 10-15 minutes. Consult your owner’s manual for the specific procedure for your vehicle. Your truck is now ready to start.
Verified Vehicle Compatibility
This module is a direct replacement for service numbers 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802. It fits a wide range of GM trucks and SUVs. Please verify your model and options below to ensure proper fitment. This is a reliable solution for your 2003-2007 Sierra 2500 PCM and many other models.
AVALANCHE 1500 (03-06), ESCALADE / ESV / EXT (03-06), HUMMER H2 (03-07), SIERRA 1500/2500/3500/DENALI (03-07 Classic), SILVERADO 1500/2500/3500 (03-07 Classic), SUBURBAN 1500/2500 (03-06), TAHOE (03-06), YUKON / XL 1500 / XL 2500 (03-06), ENVOY XL (03), ISUZU ASCENDER (03), SSR (03), TRAILBLAZER EXT (03). (Please check the detailed list and specific engine/ID options from the original data to confirm for your exact vehicle).
Frequently Asked Questions
What is VIN programming?
VIN programming is the process where we load your vehicle’s unique 17-digit Vehicle Identification Number (VIN) and the latest GM-certified software onto the PCM. This ensures the module communicates perfectly with your truck’s specific engine, transmission, and options, just like the original part from the factory.
Do I need to do anything after I install it?
Installation is straightforward. In most cases, it’s plug-and-play. Some vehicles may require a simple security relearn procedure which takes about 10-15 minutes and doesn’t require any special tools. We provide instructions for this common procedure.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the old PCM (like code P0601), this replacement module will resolve the issue. It’s crucial to ensure other potential problems (like faulty sensors or wiring) have been ruled out first.
Is this a brand new part?
This is a high-quality, tested, and verified replacement part that is guaranteed to meet or exceed original equipment performance. We ensure its reliability and back it with a warranty. The critical part is the fresh, VIN-specific programming we perform before shipping.
Where do I provide my VIN?
After you complete your purchase, you will need to send us your vehicle’s 17-digit VIN. We cannot program and ship your module without it. Please double-check your VIN for accuracy to avoid any delays.