Get Your GM Truck Running Right Again
Is your 1998-1999 Chevrolet Suburban 2500 giving you headaches? If you’re dealing with a frustrating no-start condition, erratic engine behavior, or a persistent Check Engine light, a failing Powertrain Control Module (PCM) is often the culprit. As the central computer for your engine and transmission, its health is non-negotiable for performance and reliability. This isn’t just a replacement part; it’s a direct solution to get your truck back on the road without the typical dealership hassle and expense.
We offer a dependable, tested, and pre-programmed PCM specifically for your vehicle. Before we ship it, we flash the module with the latest official GM software updates using the Vehicle Identification Number (VIN) you provide. This critical step ensures the PCM communicates perfectly with your truck’s specific systems, restoring its original performance and efficiency. Forget about costly towing fees or scheduling appointments for programming—this module arrives ready for installation.
A Technician’s Notebook
I remember a ’99 Yukon that came into the shop with a complaint of intermittent stalling at stoplights. No rhyme or reason. We checked fuel pressure, sensors, and wiring harnesses, but everything tested fine. The scanner wasn’t showing consistent codes, just a history of random communication faults. After ruling everything else out, we suspected the PCM was failing internally, likely due to heat cycles over 20+ years. Swapping in a VIN-programmed PCM like this one solved the problem instantly. The customer went from being ready to sell the truck to having his reliable daily driver back. These intermittent issues are classic signs of a failing computer.
Is Your Truck Showing These Symptoms?
A faulty PCM can cause a wide range of issues that might seem unrelated. If you’re experiencing any of the following, your engine computer could be the root cause:
- ✔ Check Engine Light is on, especially with codes like P0601 (Internal Control Module Memory Check Sum Error) or P0606 (PCM Processor Fault).
- ✔ The engine cranks but refuses to start.
- ✔ Unexplained stalling, rough idling, or hesitation during acceleration.
- ✔ Noticeably poor fuel economy.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Failure to pass an emissions inspection.
Your Straightforward Installation Guide
Replacing the PCM is a manageable job for a DIYer. While this 1998-1999 Suburban 2500 PCM comes programmed, you will need to perform a security relearn procedure after installation to sync it with your vehicle’s anti-theft system. This requires no special tools.
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the PCM: On most of these trucks and vans, the PCM is located in the engine compartment, typically on the driver’s side near the fender or firewall.
- Disconnect the Harnesses: Carefully unclip and remove the electrical connectors from the old PCM. The levers can be stiff, so apply steady pressure. Inspect connectors for any corrosion or damage.
- Remove the Old Module: Unbolt the old PCM from its mounting bracket and remove it from the vehicle.
- Install the New Module: Bolt your new, pre-programmed PCM into the mounting bracket. Reconnect the electrical harnesses, ensuring they click securely into place.
- Reconnect the Battery: Re-attach the negative battery terminal.
- Perform Security Relearn (Crucial Step): Turn the key to the ‘ON’ position (do not start). Attempt to start the engine; it will crank but not run. Leave the key in the ‘ON’ position for 10-12 minutes, until the ‘Security’ light on the dash turns off. Turn the key ‘OFF’ for 10 seconds. Repeat this cycle two more times for a total of three cycles (approx. 30 minutes). The vehicle should now start and run.
Verified Vehicle Compatibility
This module is a direct replacement for service number 09366810 and is interchangeable with part numbers 09355699, 16266645, 16250279, and 16258815. It fits a wide range of GM trucks and vans. Please verify your part number or match your vehicle from the list below. This is a partial list based on the common ID 9355699:
- Chevrolet Suburban 2500 (1998-1999) – Gasoline
- Chevrolet & GMC C/K Pickups (1500, 2500, 3500) (1998-1999) – Gasoline
- Chevrolet Express & GMC Savana Vans (1500, 2500, 3500) (1998-1999) – Gasoline
- Chevrolet Tahoe & GMC Yukon (1998-1999) – Gasoline
- Cadillac Escalade (1999)
- Chevrolet Astro & GMC Safari (1998)
- Chevrolet S10, GMC Sonoma, Oldsmobile Bravada, Isuzu Hombre (1998) – 4.3L V6
- Chevrolet S10 Blazer & GMC S15 Jimmy (1998)
Do I need to do anything after I buy?
Do I need to do anything after I buy?
Yes. After your purchase, you must provide us with your vehicle’s 17-digit VIN. We cannot program and ship your module without it. This ensures the PCM has the correct software for your truck’s engine, transmission, and options.
Is this part new?
No, this is a high-quality, tested used part sourced from a salvaged vehicle. Each unit is inspected and verified to be fully functional before being programmed and shipped.
Will I need a mechanic to install this?
While professional installation is always an option, this is a common DIY repair. The physical swap is straightforward. The most important part is performing the 30-minute security relearn procedure correctly, which does not require any special scan tools.
What if my part number is slightly different?
This PCM, identified by service number 09366810, is a direct replacement for several other part numbers, including 09355699, 16266645, and more. As long as your vehicle is on the compatibility list, this module will function correctly once programmed to your VIN.