Restore Peak Performance to Your GM Truck or SUV
Is your 2003-2006 Suburban 1500, Silverado, or other GM vehicle acting up? If you’re dealing with a persistent check engine light, erratic engine behavior, harsh shifting, or even a no-start condition, the culprit is often a failing Powertrain Control Module (PCM). As the brain of your vehicle, the PCM controls everything from fuel mixture and ignition timing to transmission shift points. When it fails, it can cause a wide range of frustrating and hard-to-diagnose problems. I’ve seen countless vehicles in my bay with these exact issues, and a faulty PCM is a very common cause on this generation of GM trucks.
This replacement PCM, part number 89017750, is the reliable solution you need. We take the guesswork and hassle out of the repair by programming the module specifically for your vehicle using your VIN. This ensures it arrives with the latest GM software updates, often correcting drivability issues that the original factory software had. You get a direct-fit part that is ready for installation right out of the box, saving you a costly trip to the dealership for programming.
A Technician’s Notebook: The Intermittent No-Start
A customer brought in his ’05 Silverado 1500 with a problem that was driving him crazy. It would randomly refuse to start, but only after it was warm. No check engine light, no obvious cause. We checked fuel pressure, spark, and the starter—all were fine. The issue was so intermittent it wouldn’t act up in the shop. Finally, while data-logging during a long test drive, I saw the PCM drop communication for a split second right before it stalled. The internal processor was failing under heat. We installed a VIN-programmed 2003-2006 Suburban 1500 PCM (the same family of modules) and the problem was solved for good. These intermittent electrical faults are a classic sign of a failing computer.
Common Signs of a Failing PCM
- ✔ Check Engine Light is on with communication codes (like U0100) or internal processor codes (P0601, P0606).
- ✔ The engine cranks but refuses to start.
- ✔ Poor fuel economy and engine performance, including stuttering or stalling.
- ✔ The transmission shifts harshly, gets stuck in one gear, or shifts at the wrong times.
- ✔ Seemingly unrelated warning lights appearing on the dash.
- ✔ Failure to pass an emissions test due to module communication errors.
A Straightforward Guide to Installation
Replacing the PCM on these GM trucks is a job most DIYers can handle in under an hour with basic hand tools. This pre-programmed module makes it even simpler. After installation, you will need to perform a simple security relearn procedure, which does not require a scan tool.
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the PCM: On most of these trucks and SUVs, the PCM is located in the engine bay on the driver’s side, under or next to the battery tray.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be released. Once unplugged, unbolt the module from its bracket and remove it.
- Install the New Module: Bolt the new PCM into place and securely plug in the electrical connectors. Ensure they click into place.
- Reconnect Battery: Re-attach the negative battery terminal.
- Perform Security Relearn: Turn the key to the “ON” position (without starting the engine) for 10-12 minutes. The security light on the dash should turn off. Turn the key off for 10 seconds. Repeat this cycle two more times for a total of three cycles. The vehicle should now start and run with the new PCM.
Guaranteed Vehicle Compatibility
This module is a direct replacement for service numbers 89017750, 12582605, 12589463, 12602802, 89017734, and 28042802. It is guaranteed to fit the following vehicles:
- Avalanche 1500 (2003-2006)
- Cadillac Escalade, ESV, EXT (2003-2006)
- Chevrolet Silverado 1500/2500/3500 (2003-2007 Classic)
- Chevrolet Suburban 1500/2500 (2003-2006)
- Chevrolet Tahoe (2003-2006)
- Chevrolet SSR (2003)
- GMC Sierra 1500/2500/3500 (2003-2007 Classic)
- GMC Yukon & Yukon XL 1500/2500 (2003-2006)
- Hummer H2 (2003-2007)
- Isuzu Ascender (2003)
- GMC Envoy XL (2003)
- Chevrolet Trailblazer EXT (2003)
Important: Please verify your service number or provide your VIN at checkout to ensure perfect compatibility. This module is programmed specifically for your vehicle and cannot be returned if the incorrect information is provided.
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to program the PCM with the exact software and calibrations for your truck’s specific engine, transmission, and options. This ensures seamless communication with other modules and optimal performance, just like a new part from the dealer.
Is the security relearn procedure difficult?
Not at all. The 30-minute relearn procedure is simple and requires no special tools. Just your vehicle’s key and a little bit of patience. Following the steps outlined in our installation guide will sync the new PCM to your vehicle’s anti-theft system.
Will this fix my specific problem?
This PCM will correct issues directly caused by a failing computer, such as internal processor faults (P0601), communication errors, and erratic component control. While it solves many problems, it’s important to ensure your vehicle’s issues are not caused by other faulty sensors or wiring.
What if my original part number isn’t 89017750?
This module replaces several service numbers, including 12582605, 12589463, and 12602802. As long as your vehicle is on the compatibility list and your original module has one of the listed service numbers, this part will work perfectly once programmed to your VIN.