Restore Peak Performance to Your GM Truck or SUV
Is your 1998-2000 Oldsmobile Bravada, Chevy S10, GMC Jimmy, or another compatible GM vehicle suffering from perplexing issues like a persistent check engine light, rough idling, stalling, or poor fuel economy? These are classic signs of a failing Powertrain Control Module (PCM), the central computer responsible for managing your engine’s performance. This direct-fit replacement PCM, part number 16263494, is the definitive solution to restore your vehicle’s reliability and drivability.
From the Diagnostic Bay
We had a 1999 GMC Jimmy come into the shop with a persistent P0171 lean code. The owner had already replaced the MAF sensor, O2 sensors, and even the fuel pump, with no luck. The engine ran rough and would hesitate under acceleration. After hooking up our diagnostic scanner and watching the live data, we noticed the short-term fuel trims were erratic and unresponsive to throttle input. This pointed away from the sensors and toward the computer itself. We swapped in a pre-programmed PCM, performed a quick security relearn, and the fuel trims immediately stabilized. The Jimmy ran like new. It’s a classic case where chasing parts gets expensive; sometimes, the problem lies with the brain controlling them.
Your Solution for a Faulty 1998-2000 Bravada PCM
The PCM is the brain of your vehicle’s engine management system. It interprets data from dozens of sensors to control fuel injection, ignition timing, transmission shift points, and emissions systems. When it fails, the symptoms can be widespread and difficult to diagnose. Our replacement module eliminates the guesswork. We take your vehicle’s VIN and program the module with the latest GM-certified software updates. This ensures that it communicates flawlessly with all other systems in your vehicle, just as the original did from the factory. This isn’t a generic, one-size-fits-all part; it’s a precisely configured component for your specific vehicle.
Common Symptoms of a Failing Powertrain Control Module:
- ✔ Persistent Check Engine Light (CEL) with various trouble codes
- ✔ Engine stalling or shutting off while driving
- ✔ Rough or erratic idling
- ✔ Noticeable decrease in fuel efficiency
- ✔ Hesitation or stumbling during acceleration
- ✔ Harsh or incorrect automatic transmission shifting
- ✔ Failure to pass emissions testing
- ✔ Complete no-start condition where the engine cranks but won’t fire
Plug-and-Play Installation Process
We make the replacement process as simple as possible. Because we program the unit to your VIN before shipping, you can avoid a costly trip to the dealership. Installation is straightforward for a DIY mechanic. Simply disconnect the battery, locate your existing PCM (often in the engine bay, near the battery or on the fender), unplug the wiring harnesses, unbolt the old unit, and install the new one. After reconnecting the battery, you may need to perform a simple security relearn procedure (often called a CASE relearn or Passlock relearn), which can typically be done without special tools. This ensures your vehicle’s anti-theft system recognizes the new module. By purchasing this pre-programmed 1998-2000 Bravada PCM, you are getting a reliable, fully updated component ready for installation right out of the box.
Frequently Asked Questions
Do I need to get this PCM programmed?
No. We handle all the programming for you before the item ships. Simply provide us with your vehicle’s 17-digit VIN during or after checkout, and we will flash the module with the latest GM software specific to your vehicle.
Where is the PCM located on my 1999 Bravada or S10?
On most compatible models like the Bravada, Jimmy, S10, and Sonoma, the PCM is located in the engine compartment on the right-hand (passenger) side, near the fender or firewall. On vans like the Express and Savana, it is typically in the left-rear of the engine compartment.
Will this fix my specific check engine light code?
This PCM can resolve a wide range of diagnostic trouble codes (DTCs) that are caused by a faulty computer. However, it is crucial to properly diagnose your vehicle first. If a code is being caused by a bad sensor or wiring issue, replacing the PCM will not fix the problem.
What is a CASE relearn and is it required?
A Crankshaft Variation Relearn (CASE) procedure may be required after installation to sync the new PCM with the engine’s crankshaft position sensor. This helps prevent misfire codes. Many vehicles will not require it, but if a P1336 code appears after installation, a mechanic with a capable scan tool will need to perform the procedure.
Is this part compatible with other numbers like 16265035?
Yes. This module is a direct replacement for several service numbers, including 16263494, 16265035, and 8162634940. As long as your vehicle is on the compatibility list, this module will function correctly once programmed to your VIN.