How to replace the Alternative Fuels Engine Control Module (AF ECM) on Chevrolet Express 3500?

The procedure for alternative fuels Engine Control Module (AF ECM) replacement starts with disconnecting the negative Battery Cable and removing the bolt from the coolant recovery reservoir before putting the reservoir aside. You should depress the release tab on the alternative fuels ecm mounting bracket while lifting the ecm out of its bracket position. The ecm electric connectors (2, 4) need to be disconnected after removing their connector position assurance locks. Proceed with installing the ecm adapter bracket inside the vehicle when bracket removal is not needed while placing it correctly on the loose forward bolt. Install the rear ecm adapter bracket bolt and the fender support rod which are attached by bolt . Next follow with installing the rod between fender and adapter bracket . Tighten the front ecm adapter bracket bolt to 24 n.m (18 lb ft) while the rear ecm adapter bracket bolt reaches 24 n.m (18 lb ft) and the support rod bolt at the fender reaches 24 n.m (18 lb ft) followed by the support rod bolt at the adapter bracket reaching 12 n.m (108 lb in). The ecm mounting bracket must be connected to the ecm adapter bracket through four bolts which should be tightened at 12 n.m (106 lb in). Insert the electrical connectors (2, 4) to the alternative fuels ecm before applying the connector position assurance locks. Fasten the alternative fuels ecm into the mounting bracket, place the coolant recovery reservoir properly before installing the mounting bolt with torque set at 11 n.m (97 lb in). Reconnect the negative Battery Cable while you might need to program the ecm's software with the required alternative fuels programming.

OEM Chevrolet Express 3500 Engine Control Module

Engine Control Computer

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23 Engine Control Modules found

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Chevrolet Express 3500 ECM
Part Number: 12692200
$186.20 MSRP: $377.12
You Save: $190.92 (51%)
Ships in 1-2 Business Days
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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 3500 | 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 3500 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 3500 | Base, LS, LT | 6 Cyl 4.3 L FLEX, 6 Cyl 4.3 L GAS
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Chevrolet Express 3500 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 3500 | Base, LS, LT | 8 Cyl 4.8 L GAS, 8 Cyl 6.0 L GAS
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Chevrolet Express 3500 PCM
Part Number: 12633238
$245.01 MSRP: $496.56
You Save: $251.55 (51%)
Ships in 1-2 Business Days
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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 3500 | 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 3500 ECM
Part Number: 12704475
$212.59 MSRP: $430.72
You Save: $218.13 (51%)
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 3500 | Base, LS, LT | 6 Cyl 4.3 L FLEX, 6 Cyl 4.3 L GAS
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Chevrolet Express 3500 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 3500 | 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 3500 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 3500 | Base, LS, LT | 8 Cyl 4.8 L GAS, 8 Cyl 6.0 L GAS
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Chevrolet Express 3500 ECM
Part Number: 12721353
$181.39 MSRP: $325.36
You Save: $143.97 (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 3500 | Base, LS, LT | 4 Cyl 2.8 L DIESEL
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Chevrolet Express 3500 ECM
Part Number: 12721350
$211.21 MSRP: $378.87
You Save: $167.66 (45%)
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 3500 | Base, LS, LT | 4 Cyl 2.8 L DIESEL
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Chevrolet Express 3500 ECM
Part Number: 12602801
$534.19 MSRP: $962.30
You Save: $428.11 (45%)
Ships in 1-2 Business Days
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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 3500 | Base, LS, LT | 8 Cyl 4.8 L GAS, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L GAS
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Chevrolet Express 3500 ECM
Part Number: 16216588
$299.95 MSRP: $548.16
You Save: $248.21 (46%)
ADD TO CART
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 3500 | Base, LS | 8 Cyl 6.5 L DIESEL
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Chevrolet Express 3500 PCM
Part Number: 12200411
$244.45 MSRP: $434.84
You Save: $190.39 (44%)
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:
- 2001-2002 Chevrolet Express 3500 | Base, LS | 8 Cyl 5.7 L BI-FUEL, 8 Cyl 5.7 L CNG, 8 Cyl 5.7 L GAS, 8 Cyl 8.1 L GAS
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Chevrolet Express 3500 ECM
Part Number: 12652526
$1011.74 MSRP: $1798.80
You Save: $787.06 (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 3500 | Base, LS, LT | 8 Cyl 6.6 L DIESEL
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Chevrolet Express 3500 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 3500 | Base, LS | 6 Cyl 4.3 L GAS, 8 Cyl 5.7 L GAS, 8 Cyl 7.4 L GAS
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Chevrolet Express 3500 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 3500 | Base | 8 Cyl 6.6 L DIESEL
View related parts
Chevrolet Express 3500 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 3500 | Base, LS, LT | 8 Cyl 6.6 L DIESEL
View related parts
Chevrolet Express 3500 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 3500 | Base, LS | 8 Cyl 5.7 L BI-FUEL, 8 Cyl 5.7 L CNG, 8 Cyl 5.7 L GAS, 8 Cyl 7.4 L GAS, 8 Cyl 8.1 L GAS
View related parts
Chevrolet Express 3500 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 3500 | Base, LS | 6 Cyl 4.3 L GAS, 8 Cyl 5.7 L GAS, 8 Cyl 7.4 L GAS
View related parts
Chevrolet Express 3500 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 3500 | Base, LS | 8 Cyl 5.7 L GAS, 8 Cyl 7.4 L GAS
View related parts
Chevrolet Express 3500 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 3500 | Base | 8 Cyl 6.6 L DIESEL

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Chevrolet Express 3500 Engine Control Module

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Chevrolet Express 3500 Engine Control Module Parts Questions & Experts Answers

PCM
12200411
Q: How to replace the Alternative Fuels Engine Control Module (AF ECM) on Chevrolet Express 3500?
A: The procedure for alternative fuels Engine Control Module (AF ECM) replacement starts with disconnecting the negative Battery Cable and removing the bolt from the coolant recovery reservoir before putting the reservoir aside. You should depress the release tab on the alternative fuels ecm mounting bracket while lifting the ecm out of its bracket position. The ecm electric connectors (2, 4) need to be disconnected after removing their connector position assurance locks. Proceed with installing the ecm adapter bracket inside the vehicle when bracket removal is not needed while placing it correctly on the loose forward bolt. Install the rear ecm adapter bracket bolt and the fender support rod which are attached by bolt . Next follow with installing the rod between fender and adapter bracket . Tighten the front ecm adapter bracket bolt to 24 n.m (18 lb ft) while the rear ecm adapter bracket bolt reaches 24 n.m (18 lb ft) and the support rod bolt at the fender reaches 24 n.m (18 lb ft) followed by the support rod bolt at the adapter bracket reaching 12 n.m (108 lb in). The ecm mounting bracket must be connected to the ecm adapter bracket through four bolts which should be tightened at 12 n.m (106 lb in). Insert the electrical connectors (2, 4) to the alternative fuels ecm before applying the connector position assurance locks. Fasten the alternative fuels ecm into the mounting bracket, place the coolant recovery reservoir properly before installing the mounting bolt with torque set at 11 n.m (97 lb in). Reconnect the negative Battery Cable while you might need to program the ecm's software with the required alternative fuels programming.