Restore Peak Performance to Your 2002 GM SUV
Is your 2002 GMC Envoy, Chevy Trailblazer, or Oldsmobile Bravada suffering from frustrating issues like a persistent check engine light, rough idling, stalling, or erratic transmission shifting? These are classic signs of a failing Powertrain Control Module (PCM), the central computer that manages your vehicle’s engine and transmission functions. Don’t let a faulty computer keep you off the road. This direct-replacement PCM, part number 12576463, is the reliable, straightforward solution to get your truck running like new again.
Unlike sourcing a part from a junkyard or a dealership, this module comes fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). We install the latest, most stable software updates from General Motors, ensuring optimal performance, fuel efficiency, and emissions control. This critical programming step eliminates the need for an expensive trip to the dealership, saving you time and money. Simply provide your VIN after purchase, and we handle the complex flashing process before shipping the part directly to you.
From the Diagnostic Bay
We had a 2002 Trailblazer come into the shop with a complaint of intermittent stalling and a P0601 (Internal Control Module Memory Check Sum Error) code. The owner had already replaced the crankshaft position sensor and the throttle body based on advice from online forums, but the problem persisted. After confirming power and ground to the PCM were solid, we knew the internal processor was failing. Instead of a costly new unit from the dealer, we installed one of our pre-programmed modules. After a quick 10-minute security relearn procedure in the driveway, the truck fired right up and ran perfectly. The customer was thrilled to have a reliable vehicle again without the massive dealership bill. It’s a classic case where targeting the root cause—the PCM—is the most effective repair.
Common Symptoms of a Failing 2002 Envoy PCM
- ✔ Persistent Check Engine Light (CEL) with various trouble codes, especially communication or internal processor faults.
- ✔ Engine stalling or shutting off unexpectedly while driving.
- ✔ Rough or unstable engine idle.
- ✔ Difficulty starting the engine or a complete no-start condition.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Misfire codes that don’t resolve after replacing plugs, coils, or injectors.
- ✔ Failure to pass state emissions testing.
Plug-and-Play Installation with VIN Programming
The heart of our service is convenience and reliability. Your new 2002 Envoy PCM arrives ready for installation. Because we program it using your VIN, it’s matched to your vehicle’s specific configuration, including engine type, transmission, and emissions equipment. While the module is plug-and-play, most GM vehicles of this era require a simple security relearn procedure to sync the new PCM with your vehicle’s anti-theft system. This procedure, often called a VATS or Passlock relearn, can be done by you at home in about 30 minutes with just your key—no special tools required.
This Module is a Direct Replacement For:
- Part Numbers: 19210066, 12571178, 12576463, 16255240
- Service Numbers: DLDA, YBLR, YBRY, YBZP
Guaranteed Fitment:
This Electronic Control Module is guaranteed to fit the following vehicles with the options specified:
- 2002 Oldsmobile Bravada (Electronic Control Module; LH engine)
- 2002 Chevrolet Trailblazer (Electronic Control Module; LH engine)
- 2002 Chevrolet Trailblazer EXT (Electronic Control Module; LH engine)
- 2002 GMC Envoy (Electronic Control Module; LH engine)
- 2002 GMC Envoy XL (Electronic Control Module; LH engine)
Take control of your vehicle’s health and restore its dependability. Ordering this pre-programmed PCM is the most efficient way to solve complex electronic issues and get your truck back to factory-spec performance. Place your order today and let us help you get back on the road with confidence.
Frequently Asked Questions
Do I need to get this PCM programmed by a dealer?
No. We handle all the programming for you before we ship the part. Simply provide us with your vehicle’s 17-digit VIN during or after checkout, and we will load the latest GM-certified software for your specific vehicle. It will arrive ready to install.
Is this part difficult to install?
The physical installation is straightforward. The PCM is located in the engine bay on the driver’s side. You will need to disconnect the battery, unplug the electrical connectors, and unbolt the old module. The new one bolts in the same way. The only additional step is a security relearn procedure, which can be done at home with your key.
How do I perform the security relearn procedure?
The most common method is the 30-minute relearn: 1) Turn the key to the ‘ON’ position (don’t start the engine) for 10 minutes. The security light should turn off. 2) Turn the key ‘OFF’ for 10 seconds. 3) Repeat this cycle two more times for a total of three 10-minute cycles. After the third cycle, the vehicle should start and run normally.
Will this fix my check engine light?
If the check engine light and associated symptoms are caused by a faulty PCM, this part will resolve the issue. However, if there are other underlying mechanical or electrical problems with your vehicle (e.g., a bad sensor or wiring issue), those will still need to be addressed separately.
What information do you need from me?
We only need your vehicle’s complete 17-digit VIN. You can find this on your dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
Is this compatible with other part numbers?
Yes, this PCM is a direct replacement for several part numbers, including 19210066, 12571178, 12576463, and 16255240, as well as service numbers like DLDA, YBLR, YBRY, and YBZP.