Is your 2004 GM truck or SUV suffering from frustrating and unpredictable engine problems?
A faulty Powertrain Control Module (PCM), often called the engine computer, is the central command center for your vehicle’s engine and transmission. When it fails, it can cause a cascade of issues, from a simple check engine light to a vehicle that won’t start at all. This replacement PCM, service number 12586242, is the definitive solution to restore your vehicle’s performance, reliability, and efficiency. It arrives at your door pre-programmed to your specific Vehicle Identification Number (VIN), ensuring a straightforward, plug-and-play installation without the need for an expensive trip to the dealership.
From the Diagnostic Bay
We recently had a 2004 Chevy Silverado 1500 towed in with a classic no-start condition that appeared after a heavy rainstorm. The owner had already replaced the battery and starter with no luck. A quick diagnostic scan revealed no communication with the engine computer. On these GM trucks, the PCM is often located under the battery tray, a spot notorious for collecting moisture. Sure enough, we found the original unit had suffered from water intrusion and corrosion. By installing one of our pre-programmed 2004 GM PCM units, we had the truck firing up and running smoothly in less than 30 minutes, saving the customer hundreds in dealership diagnostic fees and programming charges.
Symptoms of a Failing 2004 GM PCM
If you’re experiencing any of the following issues, a failing engine computer is the likely culprit. This part is designed to correct these common problems:
- ✔ Persistent Check Engine Light (CEL) with communication-related trouble codes (e.g., U0100).
- ✔ Unexplained engine stalling, hesitation, or stumbling during acceleration.
- ✔ Rough or erratic idling that you can’t seem to solve.
- ✔ Noticeable decrease in fuel economy (MPG).
- ✔ Harsh, delayed, or incorrect automatic transmission shifting.
- ✔ Complete no-start or intermittent starting problems where the engine cranks but won’t fire.
- ✔ Failure to pass state emissions inspections due to module-related faults.
The Importance of VIN Programming
A PCM is not a one-size-fits-all part. Each one must be calibrated for your vehicle’s specific engine, transmission, emissions equipment, and options. We handle this critical step for you. Simply provide your VIN when you place your order, and our technicians will flash the module with the latest, most stable software updates from General Motors. This ensures that when you receive your part, it communicates flawlessly with all other modules in your vehicle, restoring original factory performance and operation.
Direct Fit Solution for Your 2004 GM PCM
This engine computer is a direct, guaranteed-to-fit replacement for a wide range of popular 2004 General Motors vehicles. It is compatible with models such as the Chevrolet Silverado, Tahoe, Suburban, SSR, Trailblazer EXT, and Avalanche; the GMC Sierra, Yukon, and Envoy series; the Cadillac Escalade; the Hummer H2; the Buick Rainier; and the Isuzu Ascender. It directly replaces original service numbers including 12586242, 19299226, 89017738, YFKD, YFKF, YFKH, YFKJ, YFKX, YFXL, YFXM, YFXN, YFXP, and YHTN. Verifying one of these numbers on your original module ensures a perfect match.
Frequently Asked Questions
Is this module truly plug-and-play?
Yes. Because we program the module to your vehicle’s specific VIN before shipping, it is ready for installation right out of the box. In most cases, you will not need a scan tool or a trip to a mechanic. However, some vehicles may require a simple security relearn procedure, which can be done without any special tools and typically takes 10-15 minutes. We include instructions for this procedure.
Where do I provide my VIN?
You can enter your 17-digit VIN in the notes section during checkout. If you forget, we will contact you via email to retrieve it before we can program and ship your order.
What if my vehicle has an anti-theft system like Passlock or VATS?
Our programming includes the necessary information to allow your vehicle to relearn its security information. The included security relearn procedure will sync the new PCM with your vehicle’s existing anti-theft system.
How do I confirm this is the correct part for my truck?
The best way to ensure compatibility is to match the service number from your original computer to one of the numbers listed in our description (e.g., 12586242, 89017738). If you are unsure, please contact us with your VIN, and we will be happy to verify the correct fitment for you.
Do I need to send my old PCM back?
There is no core charge or need to return your old, faulty module. You can keep it or recycle it locally.