What is the function of the Engine Control Module in programming control modules on Chevrolet Express 2500?

A technician can program a control module through the data link connector with the service programming system (SPS) although it uses the same serial data circuit as scan tools for displaying data and acquiring diagnostic trouble codes (DTCs). The memory components inside control modules combine electrically erasable programmable read only memory (EEPROM) and flash read only memory to store information such as the vehicle identification number (VIN) along with crankshaft variation learned position and software/calibrations identification numbers and control module security information while eeprom uses electric programming and flash depends on complete data replacement during programming sessions. The programming methods include remote using the (Tech 2) system and pass thru with (Tech 2) and off-board remote using (OBPA) and (Tech 2) while the control module is inside the vehicle or outside the vehicle during off-board pass thru with (OBPA) and (Tech 2). The programming process should only take place after confirming that the control module needs replacement or software updates are available and checking the system voltage ranges between 12-16 volts while ensuring no charging faults exist and a battery charger remains disconnected. Rephrase the following sentence. Disable battery-loading systems first before confirming the Ignition Switch position and checking all tool connections remain secure during the programming process. After programming, the powertrain may operate differently, requiring the control module to re-learn values such as fuel trim correction, idle air control (IAC) learned position, and automatic transmission shift adapts, while additional service procedures may be necessary if the control module is replaced, including the crankshaft variation learn procedure, engine oil life reset procedure, idle learn procedure, inspection/maintenance complete system set procedure, vehicle theft deterrent password learn procedure, and throttle position (TP) sensor learn procedure.

How to service the Engine Control Module (ECM) on Chevrolet Express 2500?

Engine Control Module service requires ecm replacement and eeprom programming as one solution. The correct replacement ecm needs to be verified before removing the malfunctions ecm and placing the new service ecm into position. Turn off the ignition completely before working with connectors and dis/connecting power to avoid equipment breakdown inside the units. The metal case of control modules should stay away from battery voltage and you should not handle the pin connectors or solder joints to avoid electrostatic discharge damage. Check the control module connector area for debris before looking for proper gasket installation to block contaminant entry. Any update software process on the new control module should include recording engine oil life metrics because this omission sets default engine oil requirements to 100 percent which requires an oil change at 5000 km (3,000 mi) after the previous change. The percentage of engine oil remaining life must be retrieved using a scan tool followed by recording it. First disconnect the negative Battery Cable while you disconnect all engine wiring harness electrical connectors from the ecm. Pull away the tabs which secure the ecm bracket before taking out the ecm from its positioning. Position the ecm into its bracket before securing it by letting the bracket tabs reach inside the unit then secure the engine wiring harness connectors. After reconnecting the negative Battery Cable, program any new ecms according to the necessary procedures. A scan tool can be used for determining and setting the engine oil lifetime.

OEM Chevrolet Express 2500 Engine Control Module

Engine Control Computer

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23 Engine Control Modules found

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Chevrolet Express 2500 ECM Part Number: 12703872
$204.82 MSRP: $414.92
You Save: $210.10 (51%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Module Assembly-Engine Control (W/2ND Mpu); Engine Control Module; Module, Emission Control System
- Replaces: 12686430, 12692070
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2019-2020 Chevrolet Express 2500 | Base, LS, LT | 6 Cyl 4.3 L FLEX, 6 Cyl 4.3 L GAS
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Chevrolet Express 2500 ECM Part Number: 12625455
$232.61 MSRP: $424.70
You Save: $192.09 (46%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Module, Engine Control (W/2ND Mpu); Engine Control Module; Module, Emission Control System
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2009 Chevrolet Express 2500 | Base, LS, LT | 8 Cyl 4.8 L GAS, 8 Cyl 6.0 L GAS
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Chevrolet Express 2500 PCM Part Number: 12633238
$245.01 MSRP: $496.56
You Save: $251.55 (51%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Module, Emission Control System; Engine Control Module; ECM
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2010-2015 Chevrolet Express 2500 | Base, LS, LT | 8 Cyl 4.8 L FLEX, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX
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Chevrolet Express 2500 ECM Part Number: 12692200
$186.20 MSRP: $377.12
You Save: $190.92 (51%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Module Assembly-Engine Control (W/2ND Mpu) E78 Service ECM 2Byte; Engine Control Module; Module, Emission Control System
- Replaces: 12668866, 12668991, 12643636
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2016 Chevrolet Express 2500 | Base, LS, LT | 8 Cyl 4.8 L FLEX, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS
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Chevrolet Express 2500 ECM Part Number: 12704475
$229.88 MSRP: $430.72
You Save: $200.84 (47%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Module Assembly-Engine Control (W/2ND Mpu); Module, Emission Control System
- Replaces: 12692069, 12680656, 12686383
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2018 Chevrolet Express 2500 | Base, LS, LT | 6 Cyl 4.3 L FLEX, 6 Cyl 4.3 L GAS
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Chevrolet Express 2500 ECM Part Number: 12692201
$151.38 MSRP: $276.36
You Save: $124.98 (46%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Module Assembly-Engine Control (W/2ND Mpu) E78 Service No-Start; Engine Control Module; Module, Emission Control System
- Replaces: 12668986
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2017-2020 Chevrolet Express 2500 | Base, LS, LT | 8 Cyl 4.8 L FLEX, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS
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Chevrolet Express 2500 ECM Part Number: 12721353
$183.35 MSRP: $331.86
You Save: $148.51 (45%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Module Assembly-Engine Control (W/ 2ND Mpu) & (W/O C; Module, Emission Control System
- Replaces: 55512265
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2020-2022 Chevrolet Express 2500 | Base, LS, LT | 4 Cyl 2.8 L DIESEL
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Chevrolet Express 2500 ECM Part Number: 12721350
$205.78 MSRP: $386.45
You Save: $180.67 (47%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Module Assembly-Engine Control (W/2ND Mpu); Module, Emission Control System
- Replaces: 24000463, 55485591
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2017-2019 Chevrolet Express 2500 | Base, LS, LT | 4 Cyl 2.8 L DIESEL
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Chevrolet Express 2500 ECM Part Number: 12602801
$534.19 MSRP: $962.30
You Save: $428.11 (45%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Module, Powertrain Control (P59)
- Replaced by: 89017749
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2007 Chevrolet Express 2500 | Base, LS, LT | 6 Cyl 4.3 L GAS, 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L GAS
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Chevrolet Express 2500 PCM Part Number: 12612384
$261.01 MSRP: $488.26
You Save: $227.25 (47%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Module, Emission Control System; Engine Control Module; ECM
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2008-2009 Chevrolet Express 2500 | Base, LS, LT | 8 Cyl 4.8 L GAS, 8 Cyl 6.0 L GAS
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Chevrolet Express 2500 ECM Part Number: 12652526
$1031.92 MSRP: $1834.78
You Save: $802.86 (44%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Module Assembly-Engine Control (W/O Calibration); Engine Control Module; Module, Emission Control System
- Replaces: 12618516
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2010-2012 Chevrolet Express 2500 | Base | 8 Cyl 6.6 L DIESEL
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Chevrolet Express 2500 Control Module Part Number: 16229684
Product Specifications
- Other Name: Module, Vehicle Control; Engine Control Module; PCM; ECM
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1997 Chevrolet Express 2500 | Base, LS | 6 Cyl 4.3 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L GAS
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Chevrolet Express 2500 ECM Part Number: 19260753
Product Specifications
- Other Name: Module Assembly, Engine Control; Engine Control Module; Module, Emission Control System
- Replaces: 12606126
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006-2007 Chevrolet Express 2500 | Base, LS, LT | 8 Cyl 6.6 L DIESEL
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Chevrolet Express 2500 ECM Part Number: 12648344
Product Specifications
- Other Name: Module, Emission Control System; Engine Control Module
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2012 Chevrolet Express 2500 | Base | 8 Cyl 6.6 L DIESEL
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Chevrolet Express 2500 ECM Part Number: 16216588
$309.27 MSRP: $548.16
You Save: $238.89 (44%)
Product Specifications
- Other Name: Module, PCM (Remanufacture) Requires Reprogramming; Engine Control Module; Module, Emission Control System
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996-2002 Chevrolet Express 2500 | Base, LS | 8 Cyl 6.5 L DIESEL
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Chevrolet Express 2500 PCM Part Number: 12200411
$246.62 MSRP: $434.84
You Save: $188.22 (44%)
Product Specifications
- Other Name: Module, Emission Control System; Engine Control Module; ECM
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2001-2002 Chevrolet Express 2500 | Base, LS | 6 Cyl 4.3 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L BI-FUEL, 8 Cyl 5.7 L CNG, 8 Cyl 5.7 L GAS
View related parts
Chevrolet Express 2500 ECM Part Number: 19260758
Product Specifications
- Other Name: Module Assembly, Engine Control; Engine Control Module; Module, Emission Control System
- Replaces: 12609441
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2008-2010 Chevrolet Express 2500 | Base | 8 Cyl 6.6 L DIESEL
View related parts
Chevrolet Express 2500 PCM Part Number: 16263494
$341.63 MSRP: $610.42
You Save: $268.79 (45%)
Product Specifications
- Other Name: Module, Emission Control System; Engine Control Module; ECM
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1999-2002 Chevrolet Express 2500 | Base, LS | 6 Cyl 4.3 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L BI-FUEL, 8 Cyl 5.7 L CNG, 8 Cyl 5.7 L GAS
View related parts
Chevrolet Express 2500 Control Module Part Number: 9366810
$266.44 MSRP: $470.38
You Save: $203.94 (44%)
Product Specifications
- Other Name: Module, Vehicle Control; Engine Control Module; PCM; ECM; Module, Emission Control System
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1998 Chevrolet Express 2500 | Base, LS | 6 Cyl 4.3 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L GAS
View related parts
Chevrolet Express 2500 PCM Part Number: 16244210
Product Specifications
- Other Name: Module, Vehicle Control; Engine Control Module; ECM; Module, Emission Control System
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996 Chevrolet Express 2500 | Base, LS | 6 Cyl 4.3 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L GAS

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Chevrolet Express 2500 Engine Control Module

Want to cut long-term maintenance and repair costs? Choose OEM Engine Control Module. Those parts deliver top durability you can trust. On our site, you'll find a huge catalog of genuine Chevrolet Express 2500 parts. Prices are unbeatable, so you can keep more in your pocket. Every OEM Chevrolet Express 2500 Engine Control Module includes a manufacturer's warranty. You can also get an easy return policy that keeps buying risk free. Fast delivery, get your car on the road quickly. It's simple to search, compare, and order. Stop guessing about quality or fit. Order today and save with parts that last.

Chevrolet Express 2500 Engine Control Module Parts and Q&A

PCM
12200411
Q: What is the function of the Engine Control Module in programming control modules on Chevrolet Express 2500?
A:
A technician can program a control module through the data link connector with the service programming system (SPS) although it uses the same serial data circuit as scan tools for displaying data and acquiring diagnostic trouble codes (DTCs). The memory components inside control modules combine electrically erasable programmable read only memory (EEPROM) and flash read only memory to store information such as the vehicle identification number (VIN) along with crankshaft variation learned position and software/calibrations identification numbers and control module security information while eeprom uses electric programming and flash depends on complete data replacement during programming sessions. The programming methods include remote using the (Tech 2) system and pass thru with (Tech 2) and off-board remote using (OBPA) and (Tech 2) while the control module is inside the vehicle or outside the vehicle during off-board pass thru with (OBPA) and (Tech 2). The programming process should only take place after confirming that the control module needs replacement or software updates are available and checking the system voltage ranges between 12-16 volts while ensuring no charging faults exist and a battery charger remains disconnected. Rephrase the following sentence. Disable battery-loading systems first before confirming the Ignition Switch position and checking all tool connections remain secure during the programming process. After programming, the powertrain may operate differently, requiring the control module to re-learn values such as fuel trim correction, idle air control (IAC) learned position, and automatic transmission shift adapts, while additional service procedures may be necessary if the control module is replaced, including the crankshaft variation learn procedure, engine oil life reset procedure, idle learn procedure, inspection/maintenance complete system set procedure, vehicle theft deterrent password learn procedure, and throttle position (TP) sensor learn procedure.
ECM
12625455
Q: How to service the Engine Control Module (ECM) on Chevrolet Express 2500?
A:
Engine Control Module service requires ecm replacement and eeprom programming as one solution. The correct replacement ecm needs to be verified before removing the malfunctions ecm and placing the new service ecm into position. Turn off the ignition completely before working with connectors and dis/connecting power to avoid equipment breakdown inside the units. The metal case of control modules should stay away from battery voltage and you should not handle the pin connectors or solder joints to avoid electrostatic discharge damage. Check the control module connector area for debris before looking for proper gasket installation to block contaminant entry. Any update software process on the new control module should include recording engine oil life metrics because this omission sets default engine oil requirements to 100 percent which requires an oil change at 5000 km (3,000 mi) after the previous change. The percentage of engine oil remaining life must be retrieved using a scan tool followed by recording it. First disconnect the negative Battery Cable while you disconnect all engine wiring harness electrical connectors from the ecm. Pull away the tabs which secure the ecm bracket before taking out the ecm from its positioning. Position the ecm into its bracket before securing it by letting the bracket tabs reach inside the unit then secure the engine wiring harness connectors. After reconnecting the negative Battery Cable, program any new ecms according to the necessary procedures. A scan tool can be used for determining and setting the engine oil lifetime.