How to remove the Engine Control Module on Chevrolet Trailblazer?

For six-cylinder models, extreme caution must be taken in order to avoid static electricity damage when removing the Powertrain Control Module (PCM). Before touching the PCM, ground yourself to the body of the vehicle and use an anti-static pad for storage purposes after removal. It should be noted that a new PCM will require reprogramming with special equipment, as well as going through a crankshaft position sensor variation relearn procedure and a vehicle anti-theft system password relearn procedure. The following procedure is applicable only to removal and installation of original PCM. Pull off the positive cable from battery terminal then clean any debris around the connectors of the PCM. Unscrew the bolts then gently pull apart electrical connectors from PCM. Unfasten mounting nuts and bolts then lift out PCM. Disconnecting battery cable and cleaning debris around connector on PCM are same for V8 models made between 2002-04. Remove cover on top of PCM then release its retainer latch. Take off mounting tabs and remove it from bracket. Carefully release electrical connections from it by unlocking screws holding them up at their place. For V8 models starting 2005 disconnect battery cable together with cooling fan electrical connector respectively.Remove ECM cover then clear all rubbish surrounding other side of electrical connectors before reaching out to this part below.Detaching bank of three electrical connectors from ECM is another move one would make.Detach both latches holding it in place with two fingers' tension so that top section can tilt away while fining points of nothingness inside which you find another engine control module thus removing this part entirely.

Genuine Chevrolet Trailblazer Engine Control Module

Engine Control Computer

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12 Engine Control Modules found

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Chevrolet Trailblazer Engine Control Module Assembly (W/ 2nd Mpu)
Part Number: 12678511
$185.95 MSRP: $538.40
You Save: $352.45 (66%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Module Assembly, Engine Control (W/ 2Nd Mpu); ECM, PCM
- Replaces: 12636660, 12607096
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007-2008 Chevrolet Trailblazer | 4 DOOR | 8 Cyl 5.3L, 8 Cyl 6.0L
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Chevrolet Trailblazer MODULE ASM-ENG CONT (W/O CALN)
Part Number: 12726508
$186.27 MSRP: $335.63
You Save: $149.36 (45%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: ECM
- Replaces: 12697793, 12689093
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2021-2022 Chevrolet Trailblazer | 4 DOOR EXT, LEVEL II 4 DOOR EXTENDED, LEVEL III 4DOOR EXTENDED, LEVEL IV 4 DOOR EXTENDED, LEVEL V 4 DOOR EXTENDED | 3 Cyl 1.3L
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Chevrolet Trailblazer MODULE ASM-ENG CONT (W/O CALN)
Part Number: 12719250
$146.71 MSRP: $304.61
You Save: $157.90 (52%)
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Product Specifications
- Other Name: ECM
- Replaced by: 12733825
- Replaces: 12697426, 12680194, 12698174, 12698175, 12691559, 12711695, 12693524, 12693292, 12696017, 12703776
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2021-2025 Chevrolet Trailblazer | 4 DOOR EXT, LEVEL II 4 DOOR EXTENDED, LEVEL III 4DOOR EXTENDED | 3 Cyl 1.2L
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Chevrolet Trailblazer Engine Control Module Assembly(Remanufacture)
Part Number: 19299226
$220.58 MSRP: $453.64
You Save: $233.06 (52%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Module Asm,Engine Control (Remanufacture); ECM, PCM
- Replaces: 12586242, 89017738
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004 Chevrolet Trailblazer | 4 DOOR, 4 DOOR EXT | 8 Cyl 5.3L
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Chevrolet Trailblazer MODULE ASM-ENG CONT (W/O CALN)
Part Number: 12725787
$186.27 MSRP: $335.63
You Save: $149.36 (45%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: ECM
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2023-2025 Chevrolet Trailblazer | LEVEL II 4 DOOR EXTENDED, LEVEL III 4DOOR EXTENDED, LEVEL IV 4 DOOR EXTENDED, LEVEL V 4 DOOR EXTENDED | 3 Cyl 1.3L
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Chevrolet Trailblazer Powertrain Control Module Assembly
Part Number: 19210736
Product Specifications
- Other Name: Module Asm,Powertrain Control ; Module, Emission Control System; ECM
- Replaces: 12605843
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007 Chevrolet Trailblazer | 4 DOOR | 8 Cyl 5.3L, 8 Cyl 6.0L
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Chevrolet Trailblazer Engine Control Module (W/ 2Nd Mpu W/O Boot)& Calibration
Part Number: 12596679
Product Specifications
- Other Name: Module,Engine Control (W/ 2Nd Mpu W/O Boot)& Calibration; ECM, PCM
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006 Chevrolet Trailblazer | 4 DOOR, 4 DOOR EXT | 8 Cyl 5.3L, 8 Cyl 6.0L
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Chevrolet Trailblazer Powertrain Control Module Assembly (Refurbished)
Part Number: 19209820
Product Specifications
- Other Name: Module Assembly,Powertrain Control (Refurbished) ; Pcm, Reman; ECM, PCM
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006 Chevrolet Trailblazer | 4 DOOR, 4 DOOR EXT | 6 Cyl 4.2L
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Chevrolet Trailblazer Powertrain Control Module Assembly
Part Number: 19210071
Product Specifications
- Other Name: Module Asm,Powertrain Control ; Module, Emission Control System; ECM, PCM
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005 Chevrolet Trailblazer | 4 DOOR, 4 DOOR EXT | 8 Cyl 5.3L
View related parts
Chevrolet Trailblazer Powertrain Control Module (Referbished)
Part Number: 19210067
Product Specifications
- Other Name: Module,Powertrain Control (Referbished); ECM, PCM
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007-2008 Chevrolet Trailblazer | 4 DOOR | 6 Cyl 4.2L
View related parts
Chevrolet Trailblazer Powertrain Control Module Assembly
Part Number: 19210066
Product Specifications
- Other Name: Module Asm,Powertrain Control ; Module, Emission Control System; ECM, PCM
- Replaces: 12576463, 12571178
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002 Chevrolet Trailblazer | 4 DOOR, 4 DOOR EXT | 6 Cyl 4.2L
View related parts
Chevrolet Trailblazer Powertrain Control Module Assembly
Part Number: 19210065
Product Specifications
- Other Name: Module Asm,Powertrain Control; ECM, PCM
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2003-2005 Chevrolet Trailblazer | 4 DOOR, 4 DOOR EXT | 6 Cyl 4.2L

Chevrolet Trailblazer Engine Control Module

Chevrolet Trailblazer is equipped with the Engine Control Module (ECM) that is an electronic control unit of the car that controls the engine. There is a data acquisition system which operates from different sensors like the oxygen sensor, throttle position sensor so as to control the air to fuel mixture and the ignition time. This makes for smooth running of the engine and can in fact accommodate changes in the car's performance through installed programmable functions. Year on year, new and remanufactured forms of ECMs have been incorporated into the Trailblazer. The new ECMs are developed from new parts, while the refurnished units are old models that are refurbished to operate in a similar manner. Fitment is essential because the Engine Control Module is generally made with a particular vehicle model in mind, although some come with 'universal' fits which may need cutting. All in all, they are very important components that make the Trailblazer's engine more efficient and responsive.

Each OEM Chevrolet Trailblazer Engine Control Module we offer is competitively priced and comes with the assurance of the manufacturer's warranty for the part. Furthermore, we guarantee the speedy delivery of your orders right to your doorstep. Our hassle-free return policy is also in place for your peace of mind.

Chevrolet Trailblazer Engine Control Module Parts Questions & Experts Answers

Engine Control Module Assembly (W/ 2nd Mpu)
12678511
Q: How to remove the Engine Control Module on Chevrolet Trailblazer?
A: For six-cylinder models, extreme caution must be taken in order to avoid static electricity damage when removing the Powertrain Control Module (PCM). Before touching the PCM, ground yourself to the body of the vehicle and use an anti-static pad for storage purposes after removal. It should be noted that a new PCM will require reprogramming with special equipment, as well as going through a Crankshaft Position Sensor variation relearn procedure and a vehicle anti-theft system password relearn procedure. The following procedure is applicable only to removal and installation of original PCM. Pull off the positive cable from battery terminal then clean any debris around the connectors of the PCM. Unscrew the bolts then gently pull apart electrical connectors from PCM. Unfasten mounting nuts and bolts then lift out PCM. Disconnecting battery cable and cleaning debris around connector on PCM are same for V8 models made between 2002-04. Remove cover on top of PCM then release its retainer latch. Take off mounting tabs and remove it from bracket. Carefully release electrical connections from it by unlocking screws holding them up at their place. For V8 models starting 2005 disconnect battery cable together with cooling fan electrical connector respectively.Remove ECM cover then clear all rubbish surrounding other side of electrical connectors before reaching out to this part below.Detaching bank of three electrical connectors from ECM is another move one would make.Detach both latches holding it in place with two fingers' tension so that top section can tilt away while fining points of nothingness inside which you find another engine control module thus removing this part entirely.

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2025 Engine Control Module 2024 Engine Control Module 2023 Engine Control Module 2022 Engine Control Module 2021 Engine Control Module 2008 Engine Control Module 2007 Engine Control Module 2006 Engine Control Module 2005 Engine Control Module 2004 Engine Control Module 2003 Engine Control Module 2002 Engine Control Module