Is Your 2002 SUV Running Rough? It Could Be The PCM.
If your 2002 Oldsmobile Bravada, Chevrolet Trailblazer, or GMC Envoy is experiencing perplexing issues like stalling, erratic shifting, a persistent Check Engine Light, or even a no-start condition, the root cause is often a failing Powertrain Control Module (PCM). As the central computer of your vehicle, the PCM is responsible for managing everything from fuel delivery and ignition timing to transmission shifting and emissions control. When it begins to fail, it can create a cascade of problems that are frustrating and difficult to diagnose. Don’t let a faulty computer keep your reliable SUV off the road. This is a direct-fit, programmed replacement solution designed to restore your vehicle’s performance and reliability.
From the Diagnostic Bay
We had a 2002 Trailblazer in the shop that was driving the owner crazy. It would run perfectly for days, then suddenly stall at a stoplight and refuse to restart for 15 minutes. There were no consistent trouble codes, just a random U-code for lost communication every now and then. We checked grounds, wiring harnesses, and sensors for hours. Finally, on a hunch, we monitored the 5-volt reference signal from the PCM. While wiggle-testing the main connector, we saw the voltage flicker and drop. The internal circuits of the original PCM were failing intermittently due to heat and vibration over the years. Swapping in a properly programmed module like this one solved the problem instantly. The customer was thrilled to have their dependable truck back without the random stalling anxiety.
The Plug-and-Play Solution for Your 2002 Bravada PCM
Replacing the PCM on these GM SUVs isn’t just about swapping a box. The module must be programmed specifically to your vehicle’s unique Vehicle Identification Number (VIN) to communicate with the other modules, like the Body Control Module and anti-theft system. Our service eliminates the need for an expensive trip to the dealership for programming. Simply provide us with your VIN during checkout, and we will flash the module with the latest, most stable GM-certified software for your exact vehicle configuration. This ensures that when you receive the part, it’s ready for a straightforward installation, saving you time, money, and hassle.
Common Symptoms of a Failing Engine Computer
- ✔ Persistent and inexplicable Check Engine Light (CEL)
- ✔ Engine stalling, stumbling, or misfiring
- ✔ Harsh or erratic automatic transmission shifting
- ✔ A complete no-start or no-crank condition
- ✔ Poor fuel economy and reduced engine power
- ✔ Failure to communicate with a diagnostic scan tool
- ✔ Inconsistent instrument panel gauge readings
Guaranteed Fitment and Compatibility
This Powertrain Control Module is a direct replacement for several original equipment part numbers. If your original module has one of the following numbers, this unit is the correct fit for your vehicle:
- 19210066
- 12571178
- 12576463
- 16255240
- DLDA, YBLR, YBRY, YBZP
This part is confirmed to fit the following vehicles:
- 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)
After installation, you may need to perform a security relearn or CASE (Crankshaft Angle Sensor Error) relearn procedure, which can often be done without a specialized scan tool. We include instructions to guide you through this simple process.
Frequently Asked Questions
Do I need to do anything after installing this PCM?
In most cases, you will need to perform a security relearn procedure so the PCM can sync with your vehicle’s anti-theft system. This typically involves a sequence of key cycles and can be done in your driveway. We provide instructions for this. A CASE relearn may also be necessary to sync the crank sensor, which requires a capable scan tool.
How do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your 17-digit VIN. We cannot program and ship your module without it, so please provide it promptly to avoid delays.
Is this a brand new part?
This is a high-quality, fully tested replacement part that has been restored to meet or exceed original factory specifications. It is programmed with the latest GM software for optimal performance and longevity.
What if I have the wrong part number?
This module replaces several part numbers, including 19210066, 12571178, and 12576463. As long as your vehicle is a 2002 Bravada, Trailblazer, or Envoy, and your original part number is on our list, this is the correct computer for you.
What is the warranty on this computer?
This module comes with a comprehensive warranty that covers any defects in materials or workmanship. Please see our warranty page for the full terms and conditions.