Is Your GM Truck or SUV Running Rough? Get the Right Fix, Right Now.
If you’re dealing with a persistent check engine light, erratic transmission shifting, a no-start condition, or unexplained poor performance in your 2004 GM vehicle, the problem often points directly to a failing Powertrain Control Module (PCM). This isn’t just an inconvenience; it’s a critical issue that affects your vehicle’s reliability, fuel economy, and safety. Instead of guessing with other parts or facing a costly bill at the dealership, this direct-replacement programmed 89017739 PCM is the definitive solution to get you back on the road with confidence.
Common Symptoms & Your Solution
A faulty engine computer can cause a cascade of frustrating issues. You might be experiencing one or more of the following:
- Check Engine Light (CEL) with diagnostic trouble codes (DTCs) like P0601, P0602, or P0606.
- Poor Fuel Economy: The engine isn’t receiving the correct data for an efficient air-fuel mixture.
- Rough or Unstable Idle: The computer struggles to maintain proper engine RPMs.
- Transmission Problems: Harsh shifting, getting stuck in gear, or failure to shift.
- Engine Stalling or No-Start: The PCM fails to manage the ignition and fuel systems correctly.
This module is the solution. We flash it with the latest official GM software updates using your vehicle’s unique VIN. This ensures it communicates perfectly with your engine, transmission, and all other onboard systems, restoring the performance and dependability you rely on.
Features & Real-World Benefits
- ✔ VIN-Specific Programming Included: We program the module to your exact VIN before shipping. This means no expensive trips to the dealer for programming—it’s ready for installation right out of the box.
- ✔ Loaded with Latest GM Software: Your vehicle benefits from the most current factory updates, ensuring optimal engine performance, fuel efficiency, and emissions control.
- ✔ Direct-Fit Replacement: Engineered to be a perfect match for the original unit, ensuring a straightforward installation with no modifications needed. This is a true plug-and-drive solution.
- ✔ Resolves Common Drivability Issues: Specifically addresses and corrects the frustrating symptoms caused by a failing factory computer, from rough idling to transmission faults.
- ✔ Tested for Reliability: Each module is meticulously inspected to ensure it meets strict quality standards, giving you a dependable part for the heart of your vehicle’s electronics.
- ✔ Purchase Protection: This unit is backed by our one-year replacement warranty.
Expert Insight: The “Brain” of Your Workhorse
As a technician, I’ve seen countless hours and dollars wasted chasing phantom electrical gremlins in trucks like the Silverado 3500 and Savana vans. The owner replaces sensors and wiring, only for the problem to persist. In so many of these cases, the root cause is a failing PCM. It’s the central command center, and when its internal logic fails, it sends bad commands to perfectly good parts. Installing a properly programmed 89017739 PCM isn’t just replacing a component; it’s performing a brain transplant that restores order and makes the entire system work in harmony again. It’s the fix that makes all the other parts do their job correctly.
Don’t let a faulty computer keep your truck off the job site or your family SUV parked in the driveway. This fully programmed 89017739 PCM is your most effective and efficient path to restoring your vehicle’s health. Order today and get back to driving with confidence.
Frequently Asked Questions
How do I provide my VIN for programming?
After you complete your purchase, simply send us a message with your vehicle’s 17-digit Vehicle Identification Number (VIN). We cannot ship your part until we receive this information, as it is essential for the programming process.
Is any additional programming required after installation?
In most cases, no. This module is sent ready to install. However, some vehicles are equipped with anti-theft systems (Passlock, VATS) that may require a simple, key-on/key-off security relearn procedure. This procedure can be done by you in your driveway and does not require special tools.
How do I know for sure that my PCM is the problem?
Common signs include a check engine light with internal processor fault codes (like P0601), multiple unrelated error codes appearing at once, or drivability issues that persist after replacing related sensors. We always recommend having a qualified mechanic diagnose the issue before ordering.
Where is this module located on my vehicle?
The location varies by model. On many trucks like the Silverado and Sierra, it’s found under the hood on the driver’s side, near the battery. On vans like the Express and Savana, it’s often in the rear of the engine compartment. Always consult a repair manual for your specific vehicle for the exact location.
What does the one-year replacement warranty cover?
This unit is backed by our one-year replacement warranty. This covers the module itself against failure for a full year from the date of purchase. If the unit fails within this period, we will provide a replacement part.