Get Your GM Truck Running Right Again with a VIN-Programmed PCM
Is your 1998 or 1999 Chevy Express, Suburban, or Tahoe plagued by a persistent check engine light, erratic engine behavior, or a frustrating no-start condition? Before you spend a fortune at the dealership or waste time with a module that requires expensive programming, consider this direct-fit, VIN-programmed Powertrain Control Module (PCM). As the brain of your vehicle’s engine and transmission, a failing PCM can cause a host of problems that are often misdiagnosed. This reliable, tested OEM unit is the straightforward solution to get your truck or van back to factory-spec performance.
Why Our Pre-Programmed PCM is the Smart Choice
We take the guesswork and extra cost out of the repair. Simply provide your vehicle’s VIN after purchase, and we’ll flash this computer with the latest official GM software specific to your vehicle. This isn’t a generic, one-size-fits-all solution; it’s a tailored fix.
- ✔ Plug & Play Installation: Because we program it to your VIN, this module is ready to install right out of the box. No need for a trip to the dealer for expensive programming.
- ✔ Solves Common Issues: A faulty PCM can be the root cause of problems like harsh shifting, poor fuel economy, engine misfires, and various diagnostic trouble codes (DTCs).
- ✔ Cost-Effective OEM Part: Get the reliability of a genuine GM component without the new-part price tag. This unit is carefully sourced from a salvaged vehicle and fully tested.
- ✔ Latest GM Software Updates: We ensure your module is loaded with the most current calibrations from General Motors, which often include fixes for drivability and performance that weren’t available when your truck was new.
From the Shop Floor: A Classic GM PCM Diagnosis
“A customer’s ’99 Suburban came in last week with a dead misfire on cylinder 3. They had already replaced the spark plug, wire, and even the distributor cap and rotor. The misfire was still there. We hooked up the scope and saw the injector for cylinder 3 wasn’t getting a pulse signal from the computer. After confirming the wiring was good, we knew the injector driver inside the original PCM had failed—a common issue I’ve seen on hundreds of these GM Vortec engines. We installed one of our VIN-programmed PCMs, and the truck ran perfectly. It’s a classic case where the problem isn’t the mechanical part, but the computer controlling it.”
Easy Installation Guide for your 1998-1999 Express 1500 PCM
Replacing the PCM on these GM trucks and vans is a job most DIYers can handle in under 30 minutes with basic tools. Follow these steps for a smooth installation.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and secure it away from the post.
- Locate the PCM: On most of these vehicles, the PCM is located in the engine compartment, typically on the driver’s side inner fender or near the battery.
- Disconnect the Harnesses: Carefully unclip and remove the electrical connectors. These have locking tabs, so don’t force them. Inspect the pins on both the harness and the new module for any signs of corrosion or damage.
- Remove the Old Module: Unbolt the mounting bracket holding the original PCM in place and remove it from the vehicle.
- Install the New PCM: Mount your new, pre-programmed PCM in the same location, securing it with the original bolts.
- Reconnect Everything: Firmly plug the electrical harnesses back into the new module until they click into place. Reconnect your battery terminal.
- Final Check: Turn the key to the ‘On’ position for 10 seconds before starting the engine. This allows the system to initialize. Start your vehicle and enjoy restored performance!
Expert Pro Tip: Before plugging in your new PCM, take a moment to inspect the harness connectors closely. Use a small pick or brush and some electrical contact cleaner to gently clean out any dirt, debris, or green-tinged corrosion. A poor connection is the number one cause of repeat failures, and this simple step ensures a solid link between your new computer and the vehicle’s systems.
Vehicle and Part Number Compatibility
This module is a direct replacement for several part numbers. Please verify that your original module has one of the following numbers printed on its label:
Interchangeable Part Numbers: 09355699, 16266645, 9355699, 16250279, 16258815, 09366810, 9366810
This unit is confirmed to fit a wide range of 1998-1999 GM trucks, vans, and SUVs equipped with gasoline engines and service ID number 9355699. This includes, but is not limited to:
- ✔ Chevrolet Express / GMC Savana (1500, 2500, 3500)
- ✔ Chevrolet & GMC Pickups (1500, 2500, 3500)
- ✔ Chevrolet Suburban / GMC Yukon XL
- ✔ Chevrolet Tahoe / GMC Yukon
- ✔ Cadillac Escalade
- ✔ Chevrolet Astro / GMC Safari
- ✔ Chevrolet S10 / GMC Sonoma
- ✔ Chevrolet Blazer / GMC Jimmy
- ✔ Oldsmobile Bravada / GMC Envoy
- ✔ Isuzu Hombre (4.3L)