Is your 1999 or 2000 Chevrolet Tahoe or other GM truck experiencing frustrating issues like a persistent check engine light, erratic shifting, poor fuel economy, or even a no-start condition? These are classic signs of a failing Powertrain Control Module (PCM), the central computer that manages your vehicle’s engine and transmission performance. Don’t let a faulty module keep your reliable truck off the road. This direct-fit replacement PCM is the definitive solution to restore your vehicle’s original performance and reliability.
This isn’t just a replacement part; it’s a fully integrated solution. Upon purchase, we will program the module specifically to your vehicle’s Vehicle Identification Number (VIN). This critical step ensures that the PCM communicates flawlessly with all other systems in your truck, just as the original did. We load the latest software updates available from GM, which can often resolve issues that were present even in the original factory programming. This means you receive a module that is not only a perfect match but also contains the most refined operational logic for your engine and transmission.
Solving Your Vehicle’s Core Problems with a Programmed 1999-2000 Tahoe PCM
The PCM is the brain of your vehicle’s powertrain. When it begins to fail, it can send incorrect signals or fail to communicate altogether, leading to a cascade of problems that can be difficult to diagnose. By replacing your old or malfunctioning unit with our pre-programmed 16265035 PCM, you are addressing the root cause of these issues. The result is a smoother idle, more responsive acceleration, precise automatic transmission shifts, and restored fuel efficiency. Installation is straightforward, as the module is designed to be plug-and-play once programmed to your VIN, eliminating the need for an expensive trip to the dealership for programming.
From the Diagnostic Bay
We had a 2000 GMC Yukon Denali come into the shop with a complaint of intermittent stalling and a transmission that would sometimes refuse to shift out of first gear. The check engine light was on, but the codes were all over the place—O2 sensor codes, transmission solenoid codes, and random misfires. After chasing electrical gremlins for hours, we checked the PCM’s power and ground feeds, which were solid. On a hunch, we connected a scope and saw the PCM’s 5-volt reference signal was dropping out intermittently. This was the culprit. We installed one of these VIN-programmed modules, and it was like a new truck. All the ghost codes vanished, and the stalling and shifting problems were completely resolved. A single bad computer was causing a dozen different symptoms.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL)
- ✔ Engine stalling or misfiring
- ✔ Rough or inconsistent idling
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Failure to start or intermittent starting issues
- ✔ Decreased fuel economy
- ✔ Failure to pass emissions testing
This module is a direct replacement for part numbers 16263494, 16265035, 8162634940, 218-11787, and 21811787. Please verify your part number before ordering. After placing your order, simply provide us with your VIN, and we’ll handle the programming, ensuring you receive a part that’s ready for installation right out of the box.
Guaranteed Fitment For:
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
What exactly is a PCM?
The Powertrain Control Module (PCM) is your vehicle’s main onboard computer. It controls all aspects of engine and transmission function, such as fuel injection timing, spark timing, and transmission shift points, to ensure optimal performance, fuel economy, and emissions.
Why do you need my VIN number?
Your Vehicle Identification Number (VIN) contains critical information about your vehicle’s specific build, including engine size, transmission type, and factory options. We use the VIN to load the exact GM-certified software your vehicle requires, ensuring perfect compatibility and function.
Is any additional programming required after installation?
No. Because we program the module to your VIN before shipping, it is ready for installation. In most cases, you will not need to perform any additional procedures. However, some GM vehicles may require a security relearn or crank position sensor relearn, which can be done with a capable scan tool or by following a simple manual procedure.
What if my original part number is not listed but my vehicle is?
This module replaces several part numbers, as listed in the description (16263494, 16265035, etc.). If your vehicle model and year are listed, and your original module has one of these part numbers, this unit will be a correct fit. We program based on your VIN to ensure compatibility.
Where is the PCM located on my 1999-2000 Tahoe?
On most 1999-2000 GMT400 platform trucks and SUVs like the Tahoe, Yukon, and Suburban, the PCM is located in the engine compartment on the driver’s side, often near the fender or firewall.