Is your 1998-2000 Oldsmobile Bravada, Chevy S10, GMC Jimmy, or other compatible GM truck suffering from perplexing engine problems? Issues like a persistent check engine light, erratic shifting, stalling, or a no-start condition often point to a failing Powertrain Control Module (PCM). As the central computer for your engine and transmission, a faulty PCM can disrupt your vehicle’s performance, fuel economy, and reliability. This replacement PCM, part number 8162634940, is the definitive solution to restore your vehicle’s factory operation.
We take the guesswork and hassle out of the repair. Unlike a generic module from a parts store, this unit is professionally programmed to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This ensures perfect compatibility with your vehicle’s unique configuration and options. By programming the module with the latest GM-certified software updates, we also help resolve potential factory bugs and improve overall powertrain efficiency and performance. Simply provide your VIN after purchase, and we’ll handle the complex programming for you.
From the Diagnostic Bay
I once had a 1999 GMC Jimmy in the shop that was driving the owner crazy. It had a random misfire code (P0300) and would occasionally stall at red lights. The owner had already replaced the spark plugs, wires, cap, and rotor twice. We checked fuel pressure, scanned for vacuum leaks, and tested the sensors—everything looked fine. On a hunch, we checked the power and ground circuits to the PCM and found a corroded ground wire near the thermostat housing. After cleaning it, the problem persisted. We finally swapped in a known-good PCM, and the truck ran perfectly. The original PCM’s internal driver circuits had been damaged from the intermittent ground connection. It’s a great reminder that while external wiring is often the culprit, the module itself can be the final point of failure.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Rough or erratic idling.
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ Noticeable decrease in fuel economy.
- ✔ Complete no-start condition where the engine cranks but won’t fire.
- ✔ Failure to pass state emissions testing.
Your Direct-Fit 1998-2000 Bravada PCM Solution
This module is a direct replacement for original part numbers 16263494, 16265035, 8162634940, 218-11787, and 21811787. It fits a wide range of GM vehicles from the late 90s and early 2000s, including the Chevrolet S10, Blazer, Express Van, Silverado, Tahoe, and Suburban, as well as the GMC Sonoma, Jimmy, Safari, Savana, Sierra, and Yukon. Please verify your original part number and consult the detailed fitment list to ensure perfect compatibility.
Installation is straightforward for any experienced DIY mechanic or professional technician. Once you receive the VIN-programmed module, simply disconnect the battery, remove the old PCM, install the new one, and reconnect the battery. In some cases, a security relearn or Crankshaft Variation (CASE) relearn procedure may be required after installation, which can often be performed without special tools. This simple process gets you back on the road quickly, without the high cost and scheduling delays of a dealership visit.
Frequently Asked Questions
Do I need to program this PCM?
No. We handle all the programming for you before shipment. Simply provide us with your vehicle’s 17-digit VIN during or after checkout, and the module will arrive ready for installation with the latest GM software for your specific vehicle.
What is a VIN and where do I find it?
The VIN (Vehicle Identification Number) is a unique 17-digit code for your vehicle. You can typically find it on a plate on the driver’s side dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
Is any additional setup needed after installation?
In many cases, the module is plug-and-play. However, some GM vehicles may require a Security Relearn Procedure (to sync the module with your key’s anti-theft chip) or a Crankshaft Position Sensor (CASE) Relearn. These procedures are straightforward and instructions can be readily found online or in a service manual.
How can I be sure this fits my vehicle?
The best way is to match the part number from your original module to one of the compatible numbers listed (e.g., 16263494). You can also use the detailed fitment list on this page. If you’re still unsure, feel free to contact us with your VIN, and we’ll confirm compatibility for you.
What is the difference between a PCM, ECM, and ECU?
These terms are often used interchangeably. ECU (Electronic Control Unit) is a generic term. ECM (Engine Control Module) typically controls only engine functions. PCM (Powertrain Control Module) is the most common term for modern vehicles, as it controls both the engine and the transmission functions in one integrated unit.