Restore Peak Performance to Your GM Truck or Van
As a technician with over two decades of experience under the hood, I’ve seen firsthand how a failing Powertrain Control Module (PCM) can bring a perfectly good truck to its knees. If your Chevrolet, GMC, or Isuzu is suffering from baffling issues like intermittent stalling, poor fuel economy, erratic shifting, or a persistent Check Engine Light, the problem often traces back to this central computer. This isn’t just a part; it’s the brain of your vehicle’s operation, and when it falters, everything else does too. That’s why we offer this reliable, VIN-programmed PCM as a direct, hassle-free solution.
We take the guesswork and extra expense out of the repair. Forget about towing your truck to a dealership and paying hefty programming fees. Before we ship this module, our experts will flash it with the latest GM-certified software using the VIN you provide. This ensures it communicates perfectly with your truck’s specific systems right out of the box. This is the same process a dealership would use, but delivered right to your door. This is the most effective way to solve complex electronic issues and get your reliable workhorse back on the road.
From the Diagnostic Bay
I remember a 1999 Silverado that came into my shop with a ghost of a problem. The owner said it would randomly stall at red lights, but never threw a consistent code. We checked fuel pressure, sensors, and wiring for days. Finally, on a hunch, we monitored the PCM’s live data and saw the processor would momentarily drop offline right before a stall. It was a classic case of internal PCM failure that a standard code reader just couldn’t catch. We installed a VIN-programmed module just like this one, and the truck ran flawlessly. It’s a reminder that sometimes, the most frustrating problems have the simplest solutions if you have the right part.
Is Your Truck Showing These Symptoms?
A failing PCM can manifest in many ways. If you’re experiencing any of the following, this module is the likely solution for your 1999 Chevrolet 1500 PCM issues:
- âś” Persistent Check Engine Light (CEL)
- âś” Engine stalling or cutting out for no reason
- âś” Harsh or failed transmission shifts
- âś” Noticeable decrease in fuel mileage
- âś” The engine cranks but refuses to start
- âś” Communication error codes, such as P0601 (Internal Control Module Memory Check Sum Error) or P0605 (Internal Control Module Read Only Memory (ROM) Error)
- âś” Failure to pass an emissions test
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 basic guide:
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the Module: On most of these trucks and vans, the PCM is located in the engine bay, often on the driver’s side fender or near the battery.
- Disconnect Connectors: Carefully unlatch and remove the wiring harness connectors from the old module. These connectors have locking tabs, so be gentle to avoid breaking them.
- Remove the Old PCM: Unbolt the old module 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 re-fasten the bolts.
- Reconnect and Secure: Plug the wiring harnesses back into the new module until they click firmly into place. Reconnect your battery terminal.
- Final Check: Start the vehicle. The check engine light may stay on for a short period as the system runs its self-checks. A short drive cycle is often all that’s needed for it to operate correctly.
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 16263494, 16265035, 8162634940, and 218-11787. It is guaranteed to fit the following vehicles with the specified options. Please verify your part number or contact us with your VIN if you are unsure.
CHEVROLET 2500 PICKUP 99-00 (Gasoline), ID 16263494 for 99
CHEVROLET 3500 PICKUP 99-00 (Gasoline), ID 16263494 for 99
SILVERADO 1500 PICKUP 99-00 (4.3L V6)
SUBURBAN 1500/2500 99 (Gasoline), ID 16263494
TAHOE 99-00 (Gasoline), ID 16263494 for 99
EXPRESS VAN 1500/2500/3500 99-02 (Gasoline), check ID 16263494
GMC 1500 PICKUP 99 (5.0L & 5.7L), ID 16263494
GMC 2500/3500 PICKUP 99-00 (Gasoline), ID 16263494 for 99
SIERRA 1500 PICKUP 99-00 (4.3L V6)
YUKON & YUKON DENALI 99-00, check ID/location
SAVANA VAN 1500/2500/3500 99-02 (Gasoline), check ID 16263494
CADILLAC ESCALADE 99-00
CHEVROLET/GMC S10/S15/SONOMA 98-00 (4.3L), check build date opt ZN4 for 98
BLAZER/JIMMY 98-00, check build date opt ZN4 for 98
OLDSMOBILE BRAVADA 98-00, check build date opt ZN4 for 98
ISUZU HOMBRE 98-00 (4.3L), check build date opt ZN4 for 98
CHEVROLET/GMC ASTRO/SAFARI VAN 99-01, ID 16263494
Frequently Asked Questions
What is a PCM and what does it do?
The Powertrain Control Module (PCM) is your vehicle’s main computer. It controls all aspects of engine and transmission function, including fuel mixture, ignition timing, and shift points, to ensure optimal performance and efficiency.
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to program the PCM with the exact software and calibrations your specific vehicle requires. This ensures seamless integration and avoids compatibility issues, making the installation plug-and-play.
Is any other programming required after installation?
No. This module arrives pre-programmed and ready for installation. In some cases, a security relearn procedure may be necessary, which can typically be done without special tools. Instructions are available upon request.
Will this fix my Check Engine Light?
If the Check Engine Light is caused by a faulty PCM (e.g., codes P0601-P0606), then yes, this module will resolve the issue. However, you should always confirm the diagnosis and ensure no other sensor or wiring faults are present.