Restore Peak Performance to Your GM Truck or Van
Is your 1998-1999 Chevrolet Suburban 2500, Tahoe, Yukon, or Express van running rough, shifting erratically, or failing to start? These are classic signs of a failing Powertrain Control Module (PCM), the electronic brain of your vehicle. A faulty PCM can cause a cascade of frustrating issues, from poor fuel economy to a complete no-start condition, leaving you stranded and facing a complex repair. This replacement PCM, part number 09355699, is the definitive solution to restore your vehicle’s factory performance and reliability.
Expert Pro Tip
Before replacing your PCM, always perform a thorough check of your vehicle’s battery, alternator, and primary ground connections (battery to frame, frame to engine block). A weak or intermittent power supply can often mimic PCM failure symptoms. A simple voltage drop test on the main power and ground circuits at the PCM connector can save you from replacing a perfectly good module.
Common Symptoms of a Failing PCM
- ✔ Check Engine Light is on with communication-related trouble codes (e.g., U-codes).
- ✔ Engine cranks but will not start.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Stalling, stumbling, or rough idling for no apparent reason.
- ✔ A significant, unexplained drop in fuel mileage.
- ✔ Intermittent electrical problems that seem to have no source.
- ✔ Failure to pass an emissions test.
The Simple, Pre-Programmed Solution for Your 1998-1999 Suburban 2500 PCM
Don’t let a complex computer issue keep your truck off the road. We take the guesswork and hassle out of the repair process. This is a quality, tested PCM sourced from a salvaged vehicle. The key benefit is our professional programming service: upon purchase, simply provide us with your vehicle’s 17-digit VIN. Our technicians will then flash the module with the latest, most up-to-date GM factory software specific to your exact vehicle configuration. This ensures that engine parameters, transmission shift points, and all other critical functions operate precisely as the manufacturer intended. When you receive the module, it’s ready for a straightforward installation.
Direct-Fit for a Wide Range of GM Vehicles
While this is a perfect match for the 1998-1999 Suburban 2500 PCM, this versatile module, identified by service number 09355699, is also the correct replacement for a vast array of popular GM trucks and vans from that era. This unit directly interchanges with part numbers: 16266645, 9355699, 16250279, 16258815, 09366810, and 9366810.
It is a confirmed fit for models including:
- Chevrolet & GMC C/K 1500, 2500, 3500 Pickups (1998-1999)
- Chevrolet Suburban & Tahoe (1998-1999)
- GMC Yukon & Yukon XL (1998-1999)
- Cadillac Escalade (1999)
- Chevrolet Express & GMC Savana Vans (1998-1999)
- Chevrolet Astro & GMC Safari Vans (1998)
- Oldsmobile Bravada, Chevrolet S10 Blazer, GMC S15 Jimmy (1998)
- And more…
After installation, the only remaining step is a simple security relearn procedure (often called the “key-on/key-off” method), which you can easily perform yourself in about 30 minutes without any special tools. This syncs the replacement PCM with your vehicle’s anti-theft system.
Frequently Asked Questions
Do I need to program this PCM?
No. We handle all the programming for you before shipment. Simply provide your vehicle’s VIN during or after checkout, and we will load the correct GM software for your specific application. It arrives ready to be installed.
What is the security relearn procedure?
This is a simple process to sync the new PCM with your vehicle’s anti-theft system. It typically involves turning the key to the ‘ON’ position for 10 minutes, ‘OFF’ for 10 seconds, and repeating this cycle three times. Specific instructions for your vehicle are widely available online and are easy to follow.
Is this a new part?
This is a high-quality, genuine GM part sourced from a salvaged vehicle. Each unit is thoroughly inspected and tested to ensure full functionality before being programmed and shipped.
Where is the PCM located on my truck?
On most 1998-1999 GM full-size trucks and SUVs, the PCM is located in the engine compartment on the driver’s side (LH side), often near the battery or on the inner fender. It’s a silver metal box with multiple large electrical connectors.
Will this fix my transmission shifting problems?
It very well could. The Powertrain Control Module controls both engine functions and automatic transmission shifting. If your transmission issues are caused by faulty electronic commands, replacing the PCM is often the correct fix.