Restore Peak Performance to Your GM Truck or Van
Is your trusty GMC, Chevy, or Cadillac acting up? Experiencing frustrating issues like a persistent Check Engine Light, rough idling, stalling, or poor fuel mileage? The Powertrain Control Module (PCM), the electronic brain of your vehicle’s engine and transmission, is often the culprit. After 20+ years in the bays, I’ve seen firsthand how a failing PCM can cause a cascade of problems that are tough to diagnose. This isn’t just a part; it’s the central command for your vehicle’s most critical functions.
We take the guesswork and hassle out of the repair. This replacement PCM, compatible with part number 16263494, is the definitive solution. The biggest challenge with replacing a PCM is the programming—a step that typically forces you into an expensive trip to the dealership. We solve that. Simply provide your vehicle’s VIN during checkout, and our technicians will flash the module with the very latest GM factory software specific to your truck or van. This ensures all performance parameters, fuel maps, and transmission shift points are perfectly calibrated, often correcting issues present in the original factory software. When it arrives, it’s ready for a straightforward installation.
Case Study: A Tricky Diagnosis
A customer brought in a 2000 Chevy Express 2500 work van that would randomly stall at stoplights. No rhyme or reason. We checked fuel pressure, sensors, and wiring—everything seemed fine. No consistent codes were being stored, just an occasional generic communication error. After hours of diagnostics, we decided to monitor the PCM data stream live. We finally caught it: the PCM’s processor would momentarily drop out, killing the engine. It was a classic internal failure that only showed up under specific operating temperatures. We installed a VIN-programmed module just like this one, and the van was back in reliable service the same afternoon. The customer avoided a costly dealer tow and programming fee, and we got the job done right.
Is Your GM Truck or Van Showing These Signs?
A failing PCM can manifest in many ways. If you’re noticing any of the following, it might be time for a replacement. This is especially true if you’ve already checked sensors and wiring.
- ✔ Persistent Check Engine Light (CEL)
- ✔ Diagnostic Trouble Codes (DTCs) related to internal module failure, such as P0601, P0604, or P0606.
- ✔ Unexplained stalling or engine hesitation.
- ✔ Rough or erratic engine idle.
- ✔ Harsh or incorrect transmission shifting.
- ✔ A noticeable drop in fuel economy.
- ✔ Complete no-start condition where the engine cranks but won’t fire.
A Straightforward Guide to Installation
Replacing the PCM in these GM vehicles is a job most DIYers can handle with basic tools. Our pre-programming service eliminates the most difficult step. Here’s a general guide:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the PCM: On most trucks and SUVs (Silverado, Sierra, Tahoe, S10/Blazer), the PCM is located in the engine compartment, often on the driver’s side fender or near the battery. On Express and Savana vans, it’s typically in the LH rear of the engine compartment.
- Disconnect the Connectors: Carefully unclip the wiring harness connectors from the old PCM. These connectors 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. There are usually a few bolts holding it in place.
- Install the New Module: Mount your new, pre-programmed PCM onto the bracket and securely fasten the bolts.
- Reconnect Everything: Firmly plug the wiring harnesses back into the new PCM until they click into place. Reconnect your negative battery terminal.
- Security Relearn (If Necessary): In some cases, the vehicle’s security system (Passlock/VATS) may need to be relearned to the new PCM. This is a simple procedure that usually involves turning the key to the ‘ON’ position for 10-15 minutes. We include instructions for this common procedure.
Guaranteed Fitment for Your GM Vehicle
This module is a direct replacement for part number 16263494 and other interchangeable numbers like 16265035 and 8162634940. It is confirmed to fit a wide range of GM models. Please verify your original part number or consult the list below to ensure compatibility.
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
Why do you need my VIN?
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to program the PCM with the exact software and calibrations for your vehicle’s specific engine, transmission, and options. This ensures perfect compatibility and function, just like a module from the original dealer.
Is this a plug-and-play part?
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to program the PCM with the exact software and calibrations for your vehicle’s specific engine, transmission, and options. This ensures perfect compatibility and function, just like a module from the original dealer.
Will this fix my check engine light?
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to program the PCM with the exact software and calibrations for your vehicle’s specific engine, transmission, and options. This ensures perfect compatibility and function, just like a module from the original dealer.
What if I order the wrong part?
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to program the PCM with the exact software and calibrations for your vehicle’s specific engine, transmission, and options. This ensures perfect compatibility and function, just like a module from the original dealer.