Restore Peak Performance to Your GM Truck or Van
If you’re wrestling with baffling issues like a persistent check engine light, rough idling, stalling, or poor fuel economy in your Chevrolet S10, GMC Sonoma, or another compatible GM vehicle, a failing Powertrain Control Module (PCM) is often the culprit. As the electronic brain of your engine, when the PCM starts to fail, it can create a cascade of frustrating problems. This isn’t just a replacement part; it’s a comprehensive solution. We provide a high-quality PCM, professionally programmed with the latest GM software updates specifically for your vehicle’s VIN, ensuring a seamless and effective repair.
A Technician’s Notebook: The Intermittent Stall Case
I once had a 1999 GMC Jimmy in my bay that drove the owner crazy. It would run perfectly for days, then suddenly stall at a stoplight and refuse to restart for 10 minutes. There were no consistent trouble codes, just a history of random sensor faults. After checking grounds and wiring, I suspected the PCM. On these older GM trucks, heat cycles and vibrations can cause microscopic cracks in the PCM’s circuit board, leading to intermittent failures. We swapped in a VIN-programmed module like this one, and the problem vanished instantly. It’s a classic fix for what seems like an impossible electronic gremlin.
Common Signs of a Failing PCM
A faulty engine computer can manifest in numerous ways. If your truck is experiencing any of the following, it might be time for a new PCM:
- âś” Persistent Check Engine Light (CEL)
- âś” Stored diagnostic trouble codes (DTCs) like P0601, P0605, or P0606, indicating internal module failure.
- âś” Unexplained drops in fuel efficiency.
- âś” Engine stalling, stumbling, or hesitating during acceleration.
- âś” Harsh or erratic automatic transmission shifting.
- âś” Complete no-start condition where the engine cranks but won’t fire.
- âś” Failure to pass state emissions testing.
A Straightforward Guide to Installation
Replacing the PCM on these vehicles is a job most DIYers can handle in their own driveway. Our pre-programming service means you won’t need a trip to the dealership for expensive flashing. Just follow these steps:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electronic work.
- Locate the PCM: On most S10/Sonoma models, the PCM is located in the engine bay on the passenger side (RH side) near the firewall or fender. On vans and full-size trucks, it may be on the driver’s side (LH side).
- Disconnect the Connectors: Carefully unclip the wiring harness connectors from the old module. They have locking tabs that need to be released. Avoid pulling on the wires themselves.
- Remove the Old Module: Unbolt the PCM from its mounting bracket. It’s typically held in by a few small bolts.
- Install the New Module: Bolt your new, pre-programmed PCM into the bracket and securely reconnect the wiring harnesses. You should hear a ‘click’ as they lock into place.
- Reconnect the Battery: Re-attach the negative battery terminal. You may need to perform a simple security relearn procedure (instructions widely available online), which typically involves cycling the key.
By purchasing this 1998-2000 S10 Sonoma PCM, you’re not just getting a part; you’re getting a reliable, plug-and-play fix that restores your vehicle’s factory performance and drivability.
Will This Fit My Vehicle?
This module is a direct replacement for part numbers 16263494, 16265035, 8162634940, and 21811787. It fits a wide range of GM trucks and vans. Please verify your vehicle from the list below:
CHEVROLET 2500 PICKUP 00 Electronic Control Module; gasoline (LH front engine compartment)
EXPRESS 1500 VAN 00 Electronic Control Module; (LH rear engine compartment)
EXPRESS 2500 VAN 00 Electronic Control Module; (LH rear engine compartment), gasoline
EXPRESS 3500 VAN 00 Electronic Control Module; (LH rear engine compartment), gasoline
SAVANA 1500 VAN 01-02 Electronic Control Module; (LH rear engine compartment), ID 16263494
ASTRO 00-01 Electronic Control Module; (LH front by battery), ID 16263494
GMC 3500 PICKUP 00 Electronic Control Module; gasoline (LH front engine compartment)
EXPRESS 2500 VAN 01-02 Electronic Control Module; (LH rear engine compartment), gasoline, ID 16263494
S10/S15/SONOMA 99-00 Electronic Control Module; (RH front engine compartment), 4.3L
SAVANA 1500 VAN 00 Electronic Control Module; (LH rear engine compartment)
ASTRO 99 Electronic Control Module; (LH front by battery), (4.3L), ID 16263494
ISUZU HOMBRE 99-00 Electronic Control Module; (RH front engine compartment), 4.3L (6 cylinder)
SAFARI (GMC) 99-01 Electronic Control Module; (LH front by battery), ID 16263494
SAVANA 3500 VAN 01-02 Electronic Control Module; (LH rear engine compartment), gasoline, ID 16263494
EXPRESS 1500 VAN 99 Electronic Control Module; (LH rear engine compartment), ID 16263494
GMC 1500 PICKUP 99 Electronic Control Module; 5.0L, (LH engine compartment), ID 16263494
BLAZER S10/JIMMY S15 98 Electronic Control Module; (RH front engine compartment), w/build date opt ZN4
GMC 1500 PICKUP 99 Electronic Control Module; 5.7L, (LH engine compartment), ID 16263494
SAVANA 3500 VAN 99 Electronic Control Module; (LH rear engine compartment), gasoline, ID 16263494
SAVANA 3500 VAN 00 Electronic Control Module; (LH rear engine compartment), gasoline
TAHOE 00 Electronic Control Module; Classic style (LH front engine compartment)
YUKON 99 Electronic Control Module; (LH engine compartment), ID 16263494
ESCALADE 99 Electronic Control Module; (LH front engine compartment), ID 16263494
ESCALADE 00 Electronic Control Module; (LH front under battery)
EXPRESS 2500 VAN 99 Electronic Control Module; (LH rear engine compartment), gasoline, ID 16263494
S10/S15/SONOMA 98 Electronic Control Module; 6-262 (4.3L), w/build date opt ZN4
YUKON 00 Electronic Control Module; (LH front under battery), Denali
BRAVADA 98 Electronic Control Module; (6-262, 4.3L), w/build date opt ZN4
CHEVROLET 3500 PICKUP 00 Electronic Control Module; gasoline (LH front engine compartment)
ENVOY 99-00 Electronic Control Module; (RH front engine compartment)
EXPRESS 1500 VAN 01-02 Electronic Control Module; (LH rear engine compartment), ID 16263494
EXPRESS 3500 VAN 99 Electronic Control Module; (LH rear engine compartment), gasoline, ID 16263494
GMC 3500 PICKUP 99 Electronic Control Module; gasoline (LH front engine compartment), ID 16263494
ISUZU HOMBRE 98 Electronic Control Module; 4.3L (6 cylinder), w/extended build date opt ZN4
SIERRA 1500 PICKUP 99-00 Electronic Control Module; (LH front under battery), 6 cylinder
SAVANA 2500 VAN 00 Electronic Control Module; (LH rear engine compartment), gasoline
SUBURBAN 1500 99 Electronic Control Module; gasoline (LH front engine compartment), ID 16263494
CHEVROLET 1500 PICKUP 99 Electronic Control Module; 5.7L, (LH engine compartment), ID 16263494
EXPRESS 3500 VAN 01-02 Electronic Control Module; (LH rear engine compartment), gasoline, ID 16263494
GMC 2500 PICKUP 00 Electronic Control Module; gasoline (LH front engine compartment)
SILVERADO 1500 PICKUP 99-00 Electronic Control Module; (LH front under battery), 6 cylinder
SUBURBAN 2500 99 Electronic Control Module; gasoline (LH front engine compartment), ID 16263494
BLAZER S10/JIMMY S15 99-00 Electronic Control Module; (RH front engine compartment)
CHEVROLET 3500 PICKUP 99 Electronic Control Module; gasoline (LH front engine compartment), ID 16263494
SAVANA 1500 VAN 99 Electronic Control Module; (LH rear engine compartment), ID 16263494
TAHOE 99 Electronic Control Module; gasoline (LH front engine compartment), ID 16263494
BRAVADA 99-00 Electronic Control Module; (RH front engine compartment)
CHEVROLET 1500 PICKUP 99 Electronic Control Module; 5.0L, (LH engine compartment), ID 16263494
SAVANA 2500 VAN 99 Electronic Control Module; (LH rear engine compartment), gasoline, ID 16263494
SAVANA 2500 VAN 01-02 Electronic Control Module; (LH rear engine compartment), gasoline, ID 16263494
ENVOY 98 Electronic Control Module; (RH front engine compartment), w/build date opt ZN4
GMC 2500 PICKUP 99 Electronic Control Module; gasoline (LH front engine compartment), ID 16263494
Frequently Asked Questions
Frequently Asked Questions
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 perfect compatibility with your engine, transmission, and options, making the installation plug-and-play.
Is any additional programming required after I install it?
No, this module arrives fully programmed and ready for installation. In some cases, you may need to perform a simple security relearn procedure, also known as the Passlock relearn, which takes a few minutes and involves cycling the ignition key.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the PCM (like code P0601), then yes, this part will resolve the issue. However, you should always ensure other potential problems like faulty sensors or wiring have been ruled out first.
How do I send you my VIN after purchase?
After you complete your purchase, you will receive instructions on how to send us your 17-digit VIN. We cannot ship your order until we receive this information, so please provide it promptly to avoid delays.