Restore Peak Performance to Your GM Truck or Van
Is your 1999 Chevrolet Suburban 1500, or another compatible GM vehicle, suffering from perplexing issues like a persistent check engine light, erratic shifting, poor fuel economy, or a no-start condition? These are classic signs of a failing Powertrain Control Module (PCM). As the central computer of your vehicle, the PCM is responsible for managing critical engine and transmission functions. When it begins to fail, it can cause a cascade of problems that are often difficult to diagnose, leading to frustration and costly, ineffective repairs.
This replacement Powertrain Control Module, part number 16263494, is the definitive solution to restore your vehicle’s original performance and reliability. It’s not just a replacement part; it’s a direct-fit, plug-and-play solution meticulously prepared for your specific vehicle. We eliminate the guesswork and the need for expensive dealership programming by flashing the module with the latest GM-certified software updates using your vehicle’s unique VIN. This ensures perfect communication between the module and all other vehicle systems, right out of the box.
From the Diagnostic Bay
We had a 1999 Tahoe come into the shop that had its owner completely stumped. The truck would randomly stall at stoplights, the transmission would shift hard between first and 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 airflow sensor with no improvement. After hooking up our diagnostic scanner and seeing erratic data from multiple sensors, we suspected the central processor. We swapped in a pre-programmed PCM matched to the Tahoe’s VIN, and it was like a new truck. All the issues vanished instantly. It’s a powerful reminder that when multiple systems act up at once, the problem often lies with the brain that controls them all: the PCM.
Diagnosing Your 1999 Suburban PCM
A failing 1999 Suburban PCM can manifest in various ways, often mimicking other component failures. If you’re experiencing any of the following symptoms, your PCM should be a primary suspect. A faulty module can disrupt everything from fuel mixture and ignition timing to transmission shift points and emissions controls. Replacing it with a properly programmed unit is the most effective way to solve these core electronic issues and prevent further damage to related components.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL) on your dashboard.
- ✔ Vehicle fails to start or has difficulty starting.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Rough or unstable idling.
- ✔ Harsh, erratic, or delayed automatic transmission shifting.
- ✔ Engine stalling, stuttering, or misfiring while driving.
- ✔ Communication errors with diagnostic scan tools.
The Importance of VIN Programming
Simply installing a used or non-programmed module from another vehicle will not work. Modern vehicles use the VIN to ensure all electronic components are synchronized for proper operation and security. Our process is simple: after your purchase, you provide us with your vehicle’s VIN. Our technicians then use this information to load the correct factory software and calibrations onto the module. This makes installation straightforward, often requiring only basic hand tools and no further programming. This service is included with your purchase and is essential for restoring your vehicle to its factory specifications.
This module is a direct replacement for part numbers 16263494, 16265035, 8162634940, 218-11787, and 21811787, and fits a wide range of GM trucks and vans from the late 90s and early 2000s. Please review the detailed fitment list to confirm compatibility with your exact make, model, and year. By choosing our pre-programmed 1999 Suburban PCM, you are getting a reliable, cost-effective solution that gets you back on the road with confidence.
Frequently Asked Questions
Do I need to have this PCM programmed by a dealer?
No. We program the module to your vehicle’s specific VIN before shipping it to you. This means it arrives ready for installation without the need for expensive dealership programming.
What information do you need from me?
After you place your order, we will need the 17-digit Vehicle Identification Number (VIN) from your vehicle. This is typically found on your driver’s side dashboard (visible through the windshield) or on the driver’s side door jamb sticker.
Is any other procedure required after installation?
In many cases, no further steps are needed. However, some GM vehicles of this era may require a security relearn procedure (often called a CASE relearn or Passlock relearn) to sync the new PCM with the vehicle’s anti-theft system. This procedure can typically be done without special tools and instructions can be easily found online.
How do I know if this part number is correct for my vehicle?
This module replaces several part numbers, including 16263494, 16265035, and 8162634940. The best way to ensure compatibility is to match the part number from your original module or confirm your vehicle is on the detailed fitment list provided on this page.
What if my original part number is not on the list?
If your part number is not listed, please contact us with your vehicle’s year, make, model, and VIN. We can help you identify the correct module for your specific application.