Restore Peak Performance to Your GM Truck or SUV
Is your 1998 or 1999 GMC Yukon, Tahoe, or Suburban running rough, stalling unexpectedly, or showing a persistent Check Engine Light? These are classic signs of a failing Powertrain Control Module (PCM), the computer that serves as your vehicle’s brain. Over time, heat and vibration in the engine bay can degrade internal components, leading to frustrating and unpredictable drivability problems. This isn’t just an annoyance; a faulty PCM can cause poor fuel economy, failed emissions tests, and even leave you stranded. This replacement 1998-1999 Yukon PCM is the reliable, professional-grade solution to get your truck back on the road with confidence.
We take the guesswork and high cost out of the repair. Unlike a generic part from a big-box store, this module is delivered to you fully programmed with the latest GM software updates. All we need is your vehicle’s VIN at checkout. This critical step ensures the PCM communicates perfectly with your engine, transmission, and all other onboard systems right out of the box. You get a direct-fit replacement that restores original functionality and efficiency without a mandatory trip to the dealership for expensive programming.
Case Study: A Tricky Diagnosis
A few months back, a ’99 Chevy Tahoe was towed into my bay. The customer said it would crank but not start, and the fuel pump wasn’t priming. His regular mechanic had already replaced the pump and the crank sensor, but the problem persisted. When I connected my scan tool, I got a ‘No Communication’ error with the PCM. This is a huge red flag. After verifying power and ground at the PCM connectors, it was clear the module itself was dead. Instead of sending the customer to a dealer for a new, expensive computer and programming, we ordered one of these pre-programmed units. It arrived two days later, we installed it in under 15 minutes, and the truck fired right up. It’s a perfect example of how a quality, pre-programmed part saves hours of diagnostics and hundreds of dollars.
Is Your GM Truck or SUV Showing These Signs?
A failing PCM can cause a wide range of symptoms. If you’re experiencing any of the following, your engine computer could be the culprit:
- ✔ Check Engine Light is on with codes like P0601 (Internal Control Module Memory Check Sum Error) or other communication faults.
- ✔ The engine cranks but refuses to start.
- ✔ Rough idling, stalling, or hesitation during acceleration.
- ✔ Noticeably worse fuel mileage than before.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Failure to pass a state emissions inspection.
A Straightforward Guide to Installation
Replacing the PCM on these GM trucks is a job most DIYers can handle in their own driveway. Here’s a simple guide to get it done:
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the Old PCM: On most of these trucks and SUVs, the PCM is located in the engine compartment, typically on the driver’s side fender well or near the battery.
- Disconnect the Connectors: Carefully unclip the wiring harness connectors from the old module. There are usually colored levers or tabs that need to be released. Avoid forcing them.
- Remove the Module: Unbolt the old PCM from its mounting bracket and remove it from the vehicle.
- Install the New PCM: Mount your new, pre-programmed PCM onto the bracket and securely reconnect the wiring harnesses. You should hear a click as they lock into place.
- Final Step: Reconnect the negative battery terminal. The vehicle may require a security relearn procedure, which can often be done without special tools (instructions are widely available online or in service manuals).
Verified Vehicle Compatibility List
This module, part number 16250279, is a direct replacement for service numbers 16250279, 09366810, and 09355699. It fits a wide range of popular GM vehicles. Please match your original part number or verify your vehicle is on the list below.
- Cadillac Escalade: 1999
- Chevrolet/GMC C/K 1500, 2500, 3500 Pickups: 1998-1999 (Gasoline Engines)
- Chevrolet/GMC Suburban 1500, 2500: 1998-1999 (Gasoline Engines)
- Chevrolet Tahoe / GMC Yukon: 1998-1999 (Gasoline Engines)
- Chevrolet Astro / GMC Safari Van: 1998-1999
- Chevrolet Express / GMC Savana 1500, 2500, 3500 Van: 1998 (Gasoline Engines)
- Chevrolet S10 / GMC Sonoma: 1998 (4.3L V6)
- Chevrolet Blazer / GMC Jimmy / Oldsmobile Bravada: 1998 (4.3L V6)
- GMC Envoy: 1998
- Isuzu Hombre: 1998 (4.3L V6)
Note: Some 1998 S-10/Blazer platform vehicles may use part number 16258815. Please verify the ID on your original module.
Frequently Asked Questions
Frequently Asked Questions
Do I need to do anything after I install this PCM?
Because this unit comes programmed to your VIN, it’s typically a plug-and-play installation. However, on these GM vehicles, you will likely need to perform a security relearn (Passlock/VTD) and a Crankshaft Variation Relearn (CASE relearn). The security relearn can often be done without tools, while the CASE relearn requires a capable scan tool.
How do I provide my VIN?
After you complete your purchase, simply send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot program and ship the module without it.
Will this fix my transmission shifting problems?
In many cases, yes. The PCM controls both engine and transmission functions. If your shifting issues are caused by faulty electronic signals from a failing computer, this module will resolve them. It will not fix internal mechanical transmission failures.
Is this compatible with other part numbers?
Yes, this module directly replaces part numbers 16250279, 09366810, and 09355699. If your original module has one of these numbers, this is the correct part for you.
Where is the part number located on my original module?
The part number is printed on a sticker on the case of your factory PCM. You will need to locate and likely remove the module to read it clearly.