Restore Your Truck’s Brain and Brawn
Is your Silverado, Sierra, or other GM truck acting possessed? If you’re dealing with frustrating issues like random stalling, a persistent check engine light, rough idling, or a complete no-start condition, the problem often points directly to a failing Powertrain Control Module (PCM). As the central computer for your engine and transmission, when the PCM goes, it takes your truck’s reliability with it. This isn’t just a part; it’s the command center, and I’ve seen countless vehicles in my bay brought back to life with a proper replacement.
This isn’t just any replacement module. We take the guesswork and dealer-level expense out of the equation. Each 2003-2007 Silverado 1500 PCM is meticulously programmed with the very latest official GM software updates, tailored specifically to your vehicle using its VIN. This ensures seamless integration and optimal performance right out of the box. You get a reliable, plug-and-play solution that corrects factory bugs and restores the crisp engine response and smooth shifting you depend on.
Case Study: The Ghost in the Machine
A customer brought in his ’05 Sierra 1500 with a problem that had two other shops stumped. It would run perfectly for days, then suddenly stall at a stoplight and refuse to restart for an hour. No consistent codes, just pure frustration. After checking all the usual suspects—fuel pressure, crank sensor, grounds—I hooked up my scope. I noticed the 5-volt reference signal to the sensors would intermittently drop out. This pointed to an internal failure in the PCM’s logic board, a common issue caused by years of heat cycles and vibration. We installed a VIN-programmed PCM, just like this one, and the ‘ghost’ was gone for good. It’s a definitive fix for a notoriously tricky problem.
Is Your Truck’s Brain Failing? Common Symptoms
A faulty PCM can cause a wide range of problems that might seem unrelated. If you’re experiencing any of the following, your PCM is the likely culprit:
- ✔ Check Engine Light illuminated with codes like P0601, P0602, or P0606 (Internal Control Module Failure).
- ✔ Unexplained stalling or engine shutting off while driving.
- ✔ Difficulty starting the engine or a complete no-start condition.
- ✔ Poor fuel economy and decreased engine performance.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Communication errors with scan tools (U-codes).
A Straightforward Guide to Installation
Replacing the PCM on these GM trucks is a job most DIYers can handle in under an hour with basic hand tools. Our pre-programmed module makes it even simpler.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post.
- Locate the PCM: On most of these trucks and SUVs, the PCM is located in the engine bay on the driver’s side, under or next to the battery, housed in a black plastic bracket.
- Disconnect the Old Unit: Carefully unplug the electrical connectors. These usually have a lever or tab that needs to be lifted or slid to release. Once unplugged, unbolt the PCM from its mounting bracket.
- Install the New PCM: Mount your new, pre-programmed PCM into the bracket and securely reconnect the electrical harnesses. You’ll hear a click as they lock into place.
- Reconnect Power: Re-attach the negative battery terminal.
- Perform Relearn Procedure: You will need to perform a security relearn procedure (often called a Passlock or VATS relearn) to sync the new PCM with your vehicle’s anti-theft system. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times before starting the engine. A Crankshaft Variation (CASE) relearn with a capable scan tool is also recommended for optimal performance.
Verified Fitment For Your GM Truck or SUV
This module is a direct replacement for service number 12602802 and is compatible with several others. Please verify your vehicle from the list below. After purchase, simply provide your VIN for perfect programming.
This part is compatible with the following services numbers 89017750 12582605 12589463 12602802 89017734 28042802Â
ESCALADE 04 Electronic Control Module; (LH front under battery), ID 12602802
ESCALADE EXT 04 Electronic Control Module; (LH front under battery), ID 12602802
HUMMER H2 04 Electronic Control Module; (LH front under battery), SUV
SIERRA 3500 PICKUP 03 Electronic Control Module; (LH front under battery), gasoline, 6.0L
TAHOE 04 Electronic Control Module; (LH front under battery), ID 12602802
YUKON XL 2500 04 Electronic Control Module; (LH front under battery), 6.0L, ID 12602802
ENVOY XL 03 Electronic Control Module; 5.3L (next to air box)
SUBURBAN 2500 03 Electronic Control Module; (LH front under battery), 6.0L
YUKON 04 Electronic Control Module; (LH front under battery), ID 12602802
YUKON XL 2500 05-06 Electronic Control Module; (LH front under battery), 6.0L
AVALANCHE 1500 04 Electronic Control Module; (LH front under battery), ID 12602802
SIERRA 1500 PICKUP 07 Electronic Control Module; classic style (creased door skin), (LH front under battery), w/o hybrid option; w/o 4.3L
SIERRA DENALI 05-06 Electronic Control Module; (LH front under battery)
SUBURBAN 2500 04 Electronic Control Module; (LH front under battery), 6.0L, ID 12602802
YUKON XL 1500 03 Electronic Control Module; (LH front under battery)
YUKON XL 1500 04 Electronic Control Module; (LH front under battery), ID 12602802
ESCALADE ESV 03 Electronic Control Module; (LH front under battery), PCM
ESCALADE ESV 04 Electronic Control Module; (LH front under battery), ID 12602802
HUMMER H2 07 Electronic Control Module; (LH front under battery), powertrain control
SIERRA 3500 PICKUP 05-06 Electronic Control Module; (LH front under battery), gasoline, 6.0L
SIERRA DENALI 03 Electronic Control Module; (LH front under battery)
SILVERADO 2500 PICKUP 05-06 Electronic Control Module; (LH front under battery), gasoline, 6.0L
SUBURBAN 1500 03 Electronic Control Module; (LH front under battery)
HUMMER H2 05-06 Electronic Control Module; (LH front under battery)
SIERRA 2500 PICKUP 04 Electronic Control Module; (LH front under battery), gasoline, 6.0L, ID 12602802
YUKON 03 Electronic Control Module; (LH front under battery)
ESCALADE 05-06 Electronic Control Module; (LH front under battery)
ESCALADE ESV 05-06 Electronic Control Module; (LH front under battery)
SIERRA 2500 PICKUP 05-06 Electronic Control Module; (LH front under battery), gasoline, 6.0L
AVALANCHE 1500 03 Electronic Control Module; (LH front under battery)
SILVERADO 2500 PICKUP 03 Electronic Control Module; (LH front under battery), gasoline, 6.0L
SILVERADO 1500 PICKUP 04 Electronic Control Module; (LH front under battery), w/o hybrid option; w/o 4.3L; ID 12602802
TAHOE 03 Electronic Control Module; (LH front under battery)
TAHOE 05-06 Electronic Control Module; (LH front under battery)
YUKON 05-06 Electronic Control Module; (LH front under battery)
SILVERADO 3500 PICKUP 04 Electronic Control Module; (LH front under battery), gasoline, 6.0L, ID 12602802
SILVERADO 2500 PICKUP 07 Electronic Control Module; classic style (creased door skin), (LH front under battery), gasoline, 6.0L
SILVERADO 3500 PICKUP 05-06 Electronic Control Module; (LH front under battery), gasoline, 6.0L
SUBURBAN 1500 04 Electronic Control Module; (LH front under battery), ID 12602802
ISUZU ASCENDER 03 Electronic Control Module; (LH engine), 5.3L
SIERRA 1500 PICKUP 03 Electronic Control Module; (LH front under battery), w/o 4.3L
SIERRA 1500 PICKUP 04 Electronic Control Module; (LH front under battery), w/o hybrid option; w/o 4.3L; ID 12602802
ESCALADE 03 Electronic Control Module; (LH front under battery), PCM
SSR 03 Electronic Control Module; (next to air box)
SIERRA 2500 PICKUP 03 Electronic Control Module; (LH front under battery), gasoline, 6.0L
SIERRA DENALI 07 Electronic Control Module; classic style (creased door skin), (LH front under battery)
SILVERADO 3500 PICKUP 03 Electronic Control Module; (LH front under battery), gasoline, 6.0L
SUBURBAN 1500 05-06 Electronic Control Module; (LH front under battery)
TRAILBLAZER EXT 03 Electronic Control Module; 5.3L (next to air box)
SILVERADO 1500 PICKUP 05-06 Electronic Control Module; (LH front under battery), w/o hybrid option; w/o 4.3L
SILVERADO 1500 PICKUP 07 Electronic Control Module; classic style (creased door skin), (LH front under battery), w/o hybrid option; w/o 4.3L
SILVERADO 3500 PICKUP 07 Electronic Control Module; classic style (creased door skin), (LH front under battery), gasoline, 6.0L
YUKON XL 1500 05-06 Electronic Control Module; (LH front under battery)
ESCALADE EXT 05-06 Electronic Control Module; (LH front under battery)
SIERRA 1500 PICKUP 05-06 Electronic Control Module; (LH front under battery), w/o hybrid option; w/o 4.3L
SUBURBAN 2500 05-06 Electronic Control Module; (LH front under battery), 6.0L
HUMMER H2 03 Electronic Control Module; (LH front under battery)
SIERRA 2500 PICKUP 07 Electronic Control Module; classic style (creased door skin), (LH front under battery), gasoline, 6.0L
SIERRA 3500 PICKUP 07 Electronic Control Module; classic style (creased door skin), (LH front under battery), gasoline, 6.0L
SIERRA DENALI 04 Electronic Control Module; (LH front under battery), ID 12602802
SILVERADO 1500 PICKUP 03 Electronic Control Module; (LH front under battery), w/o 4.3L
ESCALADE EXT 03 Electronic Control Module; (LH front under battery), PCM
SIERRA 3500 PICKUP 04 Electronic Control Module; (LH front under battery), gasoline, 6.0L, ID 12602802
SILVERADO 2500 PICKUP 04 Electronic Control Module; (LH front under battery), gasoline, 6.0L, ID 12602802
YUKON XL 2500 03 Electronic Control Module; (LH front under battery), 6.0L
Frequently Asked Questions
Frequently Asked Questions
How do I provide my VIN for programming?
After you complete your purchase, you will receive instructions on where to send your vehicle’s 17-digit VIN. We cannot ship your PCM until we receive this information, as the programming is essential for it to function in your truck.
Is this part truly plug-and-play?
Yes, it comes programmed to your VIN. However, you will need to perform a simple, no-tool security relearn procedure that takes about 30 minutes to sync the PCM to your keys. Instructions are readily available online for this process.
What if my original part number is different from 12602802?
This PCM replaces multiple service numbers, including 89017750, 12582605, and others listed above. As long as your vehicle is on the compatibility list, this module will function correctly once programmed to your VIN.
Do I need a special scan tool for the CASE relearn?
While the truck will run without it, a CASE (Crankshaft Position System Variation) relearn is highly recommended to prevent a P1336 trouble code and ensure the most accurate ignition timing and misfire detection. Most professional scan tools can perform this function in a few minutes.