Is Your GM Truck or Van Running Rough?
If your late 90s or early 2000s GM vehicle is suffering from mysterious electrical gremlins, poor performance, or a persistent check engine light, the culprit is often a failing Powertrain Control Module (PCM). As the central computer for your engine and transmission, a faulty PCM can cause a wide range of frustrating issues, from rough idling and stalling to harsh shifting and a complete no-start condition. Don’t let a bad module keep your reliable truck or van off the road. This direct-fit, VIN-programmed PCM is the definitive solution to restore your vehicle’s performance and reliability.
From the Diagnostic Bay
We had a 2000 Chevy Silverado in the shop that was driving the owner crazy. It would randomly stall at stoplights, the transmission would shift hard into second gear, and the check engine light was on with a handful of seemingly unrelated communication codes. The owner had already replaced the throttle position sensor and the mass air flow sensor with no luck. After hooking up our professional scan tool, we noticed the data stream from the PCM was erratic. We swapped in one of our VIN-programmed modules, performed the quick security relearn, and the truck immediately ran like new. All the codes vanished, the shifting smoothed out, and the stalling issue was completely gone. It’s a classic case of a failing PCM causing phantom problems that can lead you down an expensive rabbit hole of replacing good parts.
Symptoms of a Failing Powertrain Control Module
- ✔ Persistent Check Engine Light (CEL) illumination
- ✔ Engine stalling, stumbling, or misfiring
- ✔ Poor fuel economy and loss of power
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Vehicle failing to start or starting intermittently
- ✔ Communication errors with diagnostic scan tools
- ✔ Failure to pass state emissions testing
Why Choose Our 1999 Suburban 1500 PCM?
This isn’t just a replacement part; it’s a complete, ready-to-install solution. The biggest hurdle when replacing a modern vehicle computer is the complex programming required to make it communicate with your specific vehicle. We eliminate that problem entirely. When you purchase this module, you simply provide us with your vehicle’s VIN (Vehicle Identification Number). Our technicians will then flash the unit with the latest, most up-to-date software directly from GM, ensuring it is perfectly matched to your truck’s original factory specifications. This plug-and-play approach saves you a costly trip to the dealership and the hassle of specialized programming tools. This process ensures that all engine, transmission, and emissions parameters are correct for your exact build, restoring the smooth operation you expect from your vehicle. This is the most reliable way to replace a faulty 1999 Suburban 1500 PCM and get your vehicle running properly again.
This module is a direct replacement for multiple part numbers, including 16263494 and 16265035, and fits a wide array of popular GM models such as the Chevrolet Silverado, Suburban, Tahoe, Express Van, S10, Blazer, and their GMC counterparts like the Sierra, Yukon, and Savana. Please verify your part number and check the detailed fitment list to ensure compatibility. Getting the right 1999 Suburban 1500 PCM is crucial for a successful repair.
Frequently Asked Questions
Do I need to program this PCM?
No. This PCM comes fully programmed to your vehicle’s specific VIN. After you place your order, you will need to provide us with your VIN so we can flash the module with the latest GM software before shipping it to you.
What are the most common signs of a bad PCM?
Common symptoms include a check engine light, engine stalling or misfiring, poor fuel mileage, erratic transmission shifting, and a no-start condition. You may also see multiple unrelated trouble codes stored in the computer.
Where is the PCM located on my 1999 Suburban?
On most compatible trucks and SUVs like the 1999 Suburban, Tahoe, and pickups, the PCM is located in the engine compartment on the driver’s side (LH side), often near the battery or firewall. On vans like the Express and Savana, it’s typically in the LH rear of the engine compartment.
Will I need to perform any other procedures after installation?
In many cases, you may need to perform a security relearn procedure, also known as a CASE (Crankshaft Angle Sensor Error) relearn. This is a simple process that can often be done without special tools and helps sync the new PCM with your vehicle’s anti-theft and crankshaft position systems. Instructions can be readily found online for your specific model.
Is this compatible with part number 16263494?
Yes, this module is a direct replacement for several original equipment part numbers, including 16263494, 16265035, and 8162634940. It is designed to function identically to the original factory unit.