Restore Your Vehicle’s Performance and Reliability
Are you experiencing frustrating issues with your vehicle like a persistent check engine light, rough idling, stalling, or a sudden drop in fuel economy? These are common signs of a failing Powertrain Control Module (PCM), the computer that acts as your vehicle’s brain. This replacement 2004 Buick Rainier PCM is the definitive solution to get your truck or SUV running smoothly and dependably again, restoring your confidence on the road.
This unit arrives at your door fully programmed to your specific Vehicle Identification Number (VIN). We install the latest GM-certified software updates, ensuring that once installed, your vehicle operates at peak efficiency and performance, just as it did from the factory. You can finally put an end to those unpredictable drivability problems.
Common Symptoms of a Failing PCM & Your Solution
A faulty PCM can cause a wide range of confusing issues. If you’re noticing any of the following, it’s a strong indicator that your engine computer needs replacement:
- Unexplained Check Engine Light (CEL)
- Engine stalling or cutting out while driving
- Rough or erratic idling
- Noticeable decrease in fuel mileage
- Failure to pass emissions testing
- Communication error codes (U-codes)
- Vehicle won’t start, despite a good battery and starter
This pre-programmed module is the most effective solution, eliminating the need for an expensive trip to the dealership for programming. It is a direct replacement for service numbers 12586242, 19299226, 89017738, YFKD, YFKF, YFKH, YFKJ, YFKX, YFXL, YFXM, YFXN, YFXP, and YHTN.
Features & Benefits
- โ Ready to Install: This module is professionally programmed to your vehicle’s VIN. No extra programming is required.
- โ Peak Performance: Flashed with the newest GM software updates to ensure optimal fuel efficiency, emissions, and engine operation.
- โ Guaranteed Compatibility: A direct-fit replacement for a wide range of 2004 GM trucks and SUVs, ensuring a perfect match.
- โ Solve Drivability Issues: The correct solution for eliminating rough idle, stalling, and false sensor codes caused by a failing computer.
- โ Cost-Effective Repair: Get the benefit of a fully programmed module without the high costs and scheduling hassles of a dealership visit.
- โ This unit is backed by our one-year replacement warranty for your peace of mind.
From the Technician’s Bench: Why VIN Programming is Crucial
Think of your PCM as more than just a part; it’s the central command center. It needs to know everything about your specific vehicleโfrom the type of transmission and axle ratio to the security system. Simply swapping a computer from another vehicle, even an identical one, will often result in a no-start condition or major system malfunctions. Our VIN programming service ensures this 2004 Buick Rainier PCM is a perfect digital clone of your original, tailored specifically to your vehicle’s unique configuration for a seamless and successful repair.
Frequently Asked Questions
Do I need to do any programming myself?
No. We handle all the programming before shipping. This module will arrive at your door ready to be installed. All you need to do is provide us with your vehicle’s VIN after you complete your purchase.
How do I provide my VIN?
After you place your order, simply send us a message with your 17-digit VIN. We cannot ship your part until we receive this information, as the programming is specific to your vehicle.
Is this the correct PCM for my vehicle?
This module fits a wide range of 2004 GM vehicles. Please check the fitment list on this page and, most importantly, match the service number (e.g., 12586242) from your original computer to the numbers listed in our description to ensure 100% compatibility.
What is a ‘CASE Relearn’ and will I need one?
A CASE (Crankshaft Position System Variation) Relearn may be necessary after installation. This is a simple procedure that synchronizes the new PCM with your engine’s crankshaft position sensor. Many mid-range scan tools can perform this function, or a local repair shop can do it for a small fee. It is often required to clear a P1336 trouble code after installation.
How can I be sure my old PCM is the problem?
While the symptoms listed are classic signs of PCM failure, it’s always best to have a qualified technician perform a full diagnostic. Ensure that all power and ground connections to your current PCM are clean and tight, as this can sometimes mimic a computer failure. However, if other potential causes have been ruled out, replacing the 2004 Buick Rainier PCM is the next logical step.