Is Your GM Truck or SUV Experiencing Frustrating Problems?
If your 2003-2007 Sierra Denali, Silverado, Tahoe, or another compatible GM vehicle is suddenly stalling, shifting erratically, or refusing to start, the problem often points directly to a failing Powertrain Control Module (PCM). As a technician with over 20 years of experience, I’ve seen these symptoms countless times. A faulty PCM can turn a reliable workhorse into a source of constant headaches, leaving you stranded and facing a confusing diagnosis. Don’t let a bad module keep you off the road.
The Direct-Fit Solution: A PCM Programmed for Your Truck
This Powertrain Control Module, service number 89017734, is the definitive solution to restore your vehicle’s performance and reliability. We take the guesswork and high costs out of the equation. Before we ship it, we flash the module with the latest official GM software, programmed specifically to your vehicle’s VIN. This isn’t a generic, one-size-fits-all part; it’s a component prepared to communicate perfectly with your truck’s specific systems right out of the box.
Expert Pro Tip from a 20-Year Veteran
Before you install your new PCM, take a close look at the wiring harness connectors. On these trucks, the PCM is often located under the battery tray, where moisture and battery acid fumes can cause corrosion on the connector pins. I’ve seen dozens of jobs where a new module didn’t fix the issue simply because of a poor connection. Use a small wire brush and some quality electronics cleaner to scrub the pins on the vehicle’s harness. A clean, solid connection is critical for the new module to function correctly.
Common Symptoms a New PCM Will Correct:
- โ Unexplained Check Engine Light (CEL) illumination
- โ Engine stalling or cutting out while driving
- โ Harsh or incorrect automatic transmission shifting
- โ Complete no-start condition where the engine cranks but won’t fire
- โ Communication errors with diagnostic scan tools
- โ Poor fuel economy and reduced engine power
Why a Pre-Programmed 2003-2007 Sierra Denali PCM is the Smart Choice
Choosing our VIN-programmed module saves you a trip to the dealership, which can involve costly towing, diagnostic fees, and programming charges. We handle the complex part for you. Once you provide your VIN, our technicians ensure the module has the correct calibration files for your engine, transmission, and emissions equipment. This module is also a direct replacement for several other service numbers, including 89017750, 12582605, 12589463, 12602802, and 28042802, making it a versatile fix for a wide range of GM trucks and SUVs.
Plug-and-Play Installation: No Dealer Visit Required
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 15 minutes for the system to discharge.
- Locate the PCM: On most of these trucks and SUVs, the PCM is located in the engine bay on the driver’s side, often under or next to the battery in a black plastic housing.
- Disconnect and Remove: Carefully unclip and remove the wiring harness connectors. Note their color and position. Then, unbolt the old PCM from its mounting bracket.
- Install the New Module: Bolt the new PCM into place and securely reconnect the wiring harnesses. Ensure they click into place.
- Reconnect Battery: Reattach the negative battery terminal.
- Perform Security Relearn (If Necessary): In most cases, the vehicle will start right up. Some models may require a simple security relearn procedure, which typically involves turning the key to the ‘ON’ position for 10-15 minutes. This can be done in your driveway without any special tools.