Programmed 1998-2000 Envoy PCM Powertrain Control Module 16263494

Restore Your GM’s Performance!

Get your vehicle running smoothly with our pre-programmed Powertrain Control Module. We flash it with the latest GM software using your VIN for a perfect, direct-fit replacement. No dealer visit required. Order today to fix your engine and transmission issues!

$114.95

+11.99 USPS Priority Shipping

Availability: In stock



SKU: 590-05454-21 Categories: ,
Guaranteed Safe Checkout

Is your GMC Envoy, Chevy Blazer, or S10 pickup running rough, shifting poorly, or showing a persistent check engine light? The Powertrain Control Module (PCM), the electronic brain of your vehicle’s engine and transmission, is a common point of failure on these late 90s and early 2000s GM vehicles. This replacement PCM, part number 16263494, is the definitive solution to restore your vehicle’s performance, reliability, and efficiency. We take the guesswork out of the repair by pre-programming the module to your vehicle’s specific VIN with the latest GM software updates before it ships. This ensures a seamless installation process and optimal function right out of the box.

From the Diagnostic Bay

We had a 1999 Chevy S10 with the 4.3L V6 come into the shop that was driving the owner crazy. It had a persistent P0300 random misfire code, idled terribly, and lacked power. The owner had already replaced the spark plugs, wires, distributor cap, and rotor, but the problem remained. After hooking up our diagnostic scanner and monitoring live data, we noticed erratic injector pulse commands. The issue wasn’t in the ignition system; it was a failing injector driver inside the original PCM. We installed one of our VIN-programmed modules, performed the quick security relearn, and the truck ran like new. It’s a classic example of how a faulty PCM can mimic other component failures, costing you time and money on unnecessary parts.

Common Symptoms of a Failing PCM

  • ✔ Persistent Check Engine Light (CEL) with codes like P0601, P0605, or random misfire codes.
  • ✔ Rough or unstable engine idle.
  • ✔ Unexplained drop in fuel economy.
  • ✔ Harsh, delayed, or erratic automatic transmission shifting.
  • ✔ Engine stalling, hesitation, or a complete no-start condition.
  • ✔ Failure to communicate with diagnostic scan tools.
  • ✔ Inability to pass state emissions inspections.

The Right Solution for Your 1998-2000 Envoy PCM

Don’t settle for a generic, unprogrammed module from a local parts store that requires an expensive trip to the dealership for flashing. Our process is designed for the DIY mechanic and professional alike. By providing your VIN during checkout, you receive a unit that is a direct-fit, plug-and-play replacement. This 1998-2000 Envoy PCM is loaded with the most current factory calibrations, which often correct drivability issues that were present even when the vehicle was new. This module is a direct replacement for part numbers 16263494, 16265035, and 8162634940, ensuring broad compatibility across a wide range of GM trucks and vans, including the Chevy Express, GMC Savana, Isuzu Hombre, and many more.

Installation is straightforward. Simply disconnect the battery, locate and swap the old module, and reconnect the battery. In most cases, you will need to perform a simple security relearn procedure (often called a VATS relearn) which can typically be done in your driveway without any special tools. This procedure syncs the new PCM with your vehicle’s anti-theft system. Once complete, your vehicle will start and run with its performance and stability restored.

Frequently Asked Questions

Do I need to program this PCM?

No. We handle all the programming for you before shipment. Simply provide your vehicle’s 17-digit VIN when you place your order, and the module will arrive ready for installation.

Is this a plug-and-play part?

Yes, for the most part. After installing the module, you may need to perform a simple security relearn procedure to sync the PCM with your vehicle’s anti-theft system. This can usually be done without special tools and instructions are widely available online.

Will this fix my check engine light?

If the check engine light and associated symptoms are caused by a faulty PCM, then this replacement part will solve the issue. It’s crucial to properly diagnose the problem before ordering to ensure the PCM is the root cause.

Where is the PCM located on my vehicle?

The location varies by model. On many S10/Blazer/Envoy models, it’s on the passenger side firewall in the engine compartment. On Express/Savana vans, it’s often in the LH rear of the engine compartment. On full-size pickups, it’s typically on the driver’s side inner fender, sometimes under the battery tray.

How do I confirm this is the right part for my truck?

The best way is to match the service number on your original module to one of the compatible part numbers listed: 16263494, 16265035, or 8162634940. Providing us with your VIN also allows us to verify perfect fitment.

Condition

Refurbished

Year
Genuine OEM

Yes

MPN

16263494

Interchange part number

Model

ENVOY

Year

1999

Brand

GM

Manufacturer Part Number

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