Is Your Truck or Van Running Rough? Get Back on the Road with Confidence.
When the brain of your vehicle’s engine fails, everything grinds to a halt. If your Chevrolet Suburban, Silverado, or GMC Sierra is suffering from erratic shifting, a persistent check engine light, poor fuel economy, or a no-start condition, a faulty Powertrain Control Module (PCM) is the most likely culprit. This isn’t just an inconvenience; it’s downtime for your workhorse. This replacement module is the definitive, no-hassle solution to restore your vehicle’s performance and dependability.
Common Symptoms & Your Solution
A failing engine computer can cause a host of frustrating problems. You might be experiencing one or more of the following:
- Check Engine Light: Often with communication error codes (U-codes) or internal processor failure codes (P0601, P0606).
- Poor Performance: Noticeable loss of power, hesitation during acceleration, and rough idling.
- Transmission Issues: Harsh or delayed shifting, or getting stuck in one gear (limp mode).
- No-Start Condition: The engine cranks but refuses to start, often due to a lack of fuel injector or ignition coil signal.
- Reduced Fuel Economy: The engine isn’t running efficiently, causing you to spend more at the pump.
This module is the solution. We take all the guesswork out of the repair by pre-programming this unit specifically for your vehicle using the VIN you provide. It arrives ready for installation, a true plug-and-play fix that gets you back to work. As a direct replacement for your original GM 8.1L PCM 89017749, it ensures perfect communication between your engine and transmission.
Features & Benefits
- ✔ VIN-Programmed for Your Vehicle: No need for expensive trips to the dealership for programming. This module arrives ready for installation, saving you time and money.
- ✔ Loaded with Latest GM Updates: We flash the unit with the newest factory software, ensuring optimal performance, fuel efficiency, and transmission shifting.
- ✔ Restores Original Performance: Eliminates rough idle, poor acceleration, and shifting problems, making your truck or van drive like it should.
- ✔ Direct-Fit Replacement: Engineered to match the original form, fit, and function for a straightforward installation process.
- ✔ Solves Common DTCs: A reliable fix for persistent diagnostic trouble codes related to PCM failure.
- ✔ Peace of Mind Included: This unit is backed by our one-year replacement warranty.
Expert Insight: A Master Tech’s Pre-Installation Check
Before you install your new GM 8.1L PCM 89017749, take 10 minutes to verify two critical things: your battery and your ground connections. A weak battery or a corroded ground wire can cause voltage drops that mimic PCM failure, and can even damage a new module. Ensure your battery terminals are clean and tight, and check the main engine-to-chassis ground strap for corrosion or looseness. A little preventative maintenance ensures your new computer has a clean, stable environment to work in, guaranteeing a successful, one-time repair.
Don’t let a faulty computer keep your essential vehicle off the road. This is the most reliable and efficient way to solve your engine management issues. By providing your VIN at checkout, you ensure that the replacement GM 8.1L PCM 89017749 you receive is perfectly matched to your vehicle’s specific configuration, from the engine and transmission to the tire size and gear ratio.
Frequently Asked Questions
What is a PCM and what does it do?
The Powertrain Control Module (PCM), often called the Engine Control Module (ECM), is the central computer that controls all aspects of your vehicle’s engine and transmission. It manages fuel injection, ignition timing, emissions systems, and transmission shift points to ensure optimal performance, efficiency, and reliability.
How do I provide my VIN for programming?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). You can typically add it as a note during checkout or reply to your order confirmation email with the VIN. We cannot ship your part until we receive this information.
Is any additional programming required after installation?
No. This module is programmed to your VIN and arrives ready to install. In some cases, a security relearn procedure (often called a CASE relearn or anti-theft relearn) may be necessary, which can typically be done without special tools. Instructions are widely available online for this simple procedure.
Will this fit my vehicle if my original part number is different?
Yes, this module is compatible with multiple part numbers, including 12589462 and 12602801. As long as your vehicle’s year, make, model, and engine are on the compatibility list, we will program it to function perfectly in your vehicle.
Where is the PCM located on my truck/van?
On most compatible trucks like the Silverado, Sierra, Suburban, and Avalanche, the PCM is located in the engine bay on the driver’s side, under or near the battery. On vans like the Express and Savana, it’s typically found in the rear of the engine compartment on the driver’s side.