How to operate and diagnose the power door lock system?

The power door lock system operates the door lock actuators in each door, with the system consisting of switches, actuators, Body Control Module (BCM), and associated wiring. Diagnosis typically involves checking the wiring connections and actuators for minor faults that can be easily repaired. The system is operated by bi-directional solenoids located in the doors, with lock switches having two positions: Lock and Unlock. These switches send a signal to the BCM, which then sends a signal to the door lock solenoids. It is important to check the circuit protection first, as some vehicles use a combination of circuit breakers and fuses. If no voltage is present at the switches, the wiring between the fuse panel and switches should be checked for shorts and opens. If voltage is present, the switch should be tested for continuity, and if there is no continuity in both switch positions, it should be replaced and check the wiring between the switch and the door lock solenoid. If all but one lock solenoids operate, the trim panel from the affected door should be removed to check for voltage at the solenoid while the lock switch is operated; if the inoperative solenoid is receiving voltage, it should be replaced and if it isn't, an open or short in the wire between the lock solenoid and the relay should be checked. For the keyless entry remote, the battery should be replaced when the transmitter doesn't operate the locks at a distance of ten feet, with the normal range being about 30 feet. To replace the battery, the case halves should be carefully separated using a small screwdriver, and then the three-volt, lithium battery should be replaced before snapping the case halves together.

Genuine Chevrolet Trailblazer Door Lock

Power Door Lock Actuator

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23 Door Locks found

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Chevrolet Trailblazer Latch Assembly, L/Gate
Part Number: 13524683
$127.41 MSRP: $189.64
You Save: $62.23 (33%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Actuator, Latch, Lock, Lock Actuator
- Replaces: 13581023, 13509599, 13585478, 13587646
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2021 Chevrolet Trailblazer | 4 DOOR EXT | 3 Cyl 1.2L, 3 Cyl 1.3L
View related parts
Chevrolet Trailblazer Front Side Door Lock
Part Number: 15110507
$203.40 MSRP: $305.46
You Save: $102.06 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Lock,Front Side Door; Lock
- Position: Front
- Replaces: 15079224, 15076330
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002-2009 Chevrolet Trailblazer | 4 DOOR, 4 DOOR EXT | 6 Cyl 4.2L, 8 Cyl 5.3L, 8 Cyl 6.0L
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Chevrolet Trailblazer Rear Door Lock Actuator Kit
Part Number: 25664288
$81.67 MSRP: $122.08
You Save: $40.41 (34%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Actuator Kit,Rear Door Lock; Actuator, Door Jamb Switch, Lock Actuator
- Position: Rear
- Replaces: 16627973, 25664020, 16632015, 16636561, 22144363, 3635350
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002-2005 Chevrolet Trailblazer | 4 DOOR, 4 DOOR EXT | 6 Cyl 4.2L, 8 Cyl 5.3L
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Chevrolet Trailblazer Liftgate Lock
Part Number: 15110511
$228.66 MSRP: $343.40
You Save: $114.74 (34%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Lock,Lift Gate ; Lock, End Gate Lock; Lock, Lock Assembly
- Replaces: 15159269
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002-2009 Chevrolet Trailblazer | 4 DOOR, 4 DOOR EXT | 6 Cyl 4.2L, 8 Cyl 5.3L, 8 Cyl 6.0L
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Chevrolet Trailblazer Rear Door Lock Actuator Kit
Part Number: 25664287
$81.12 MSRP: $121.25
You Save: $40.13 (34%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Actuator Kit,Rear Door Lock; Actuator, Door Jamb Switch, Lock Actuator
- Position: Rear
- Replaces: 22144360, 16636560, 16624970, 22144362, 25664019, 3635351, 16632014, 16627972
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002-2005 Chevrolet Trailblazer | 4 DOOR, 4 DOOR EXT | 6 Cyl 4.2L, 8 Cyl 5.3L
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Chevrolet Trailblazer Lift Gate Window Latch
Part Number: 15840460
$89.75 MSRP: $134.18
You Save: $44.43 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Latch,Lift Gate Window; Latch, Window Latch
- Replaces: 15132517, 15086837
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002-2009 Chevrolet Trailblazer | 4 DOOR, 4 DOOR EXT | 6 Cyl 4.2L, 8 Cyl 5.3L, 8 Cyl 6.0L
View related parts
Chevrolet Trailblazer Front Side Door Lock Assembly
Part Number: 15110505
$123.70 MSRP: $185.77
You Save: $62.07 (34%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Lock Assembly, Front Side Door; Lock
- Position: Front
- Replaces: 15079227, 15076333
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002-2009 Chevrolet Trailblazer | 4 DOOR, 4 DOOR EXT | 6 Cyl 4.2L, 8 Cyl 5.3L, 8 Cyl 6.0L
View related parts
Chevrolet Trailblazer Front Side Door Lock
Part Number: 15110508
$113.06 MSRP: $169.80
You Save: $56.74 (34%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Lock,Front Side Door; Lock
- Position: Front
- Replaces: 15079225
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002-2009 Chevrolet Trailblazer | 4 DOOR, 4 DOOR EXT | 6 Cyl 4.2L, 8 Cyl 5.3L, 8 Cyl 6.0L
View related parts
Chevrolet Trailblazer Rear Side Door Lock
Part Number: 15110510
$159.40 MSRP: $239.38
You Save: $79.98 (34%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Lock,Rear Side Door; Lock, Lock Assembly
- Position: Rear
- Replaced by: 25948725
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002-2008 Chevrolet Trailblazer | 4 DOOR, 4 DOOR EXT | 6 Cyl 4.2L, 8 Cyl 5.3L, 8 Cyl 6.0L
View related parts
Chevrolet Trailblazer Rear Side Door Lock Assembly
Part Number: 25948724
$156.69 MSRP: $235.31
You Save: $78.62 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Lock Assembly, Rear Side Door; Lock, Lock Assembly
- Position: Rear
- Replaces: 15110509, 15076334, 15079228
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002-2009 Chevrolet Trailblazer | 4 DOOR, 4 DOOR EXT | 6 Cyl 4.2L, 8 Cyl 5.3L, 8 Cyl 6.0L
View related parts
Chevrolet Trailblazer Rear Side Door Lock Assembly
Part Number: 25948725
$159.40 MSRP: $239.38
You Save: $79.98 (34%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Lock Assembly, Rear Side Door; Lock, Lock Assembly
- Position: Rear
- Replaces: 15079229, 15110510
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002-2009 Chevrolet Trailblazer | 4 DOOR, 4 DOOR EXT | 6 Cyl 4.2L, 8 Cyl 5.3L, 8 Cyl 6.0L
View related parts
Chevrolet Trailblazer Latch Assembly, L/Gate
Part Number: 13537996
$209.96 MSRP: $312.50
You Save: $102.54 (33%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Latch, Lock Actuator
- Replaced by: 13548758
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2021 Chevrolet Trailblazer | 4 DOOR EXT | 3 Cyl 1.2L, 3 Cyl 1.3L
View related parts
Chevrolet Trailblazer Actuator Assembly, L/Gate Pwr Asst
Part Number: 42744248
$127.44 MSRP: $229.61
You Save: $102.17 (45%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Lift Cylinder, Lift Motor
- Replaced by: 42762903
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2021 Chevrolet Trailblazer | 4 DOOR EXT | 3 Cyl 1.2L, 3 Cyl 1.3L
View related parts
Chevrolet Trailblazer Latch Assembly, Front S/D
Part Number: 13535174
$55.75 MSRP: $83.35
You Save: $27.60 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Latch, Lock Actuator
- Position: Front
- Replaced by: 13560703
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2021 Chevrolet Trailblazer | 4 DOOR EXT | 3 Cyl 1.2L, 3 Cyl 1.3L
View related parts
Chevrolet Trailblazer Latch Assembly, Rear S/D
Part Number: 13527384
$35.81 MSRP: $53.54
You Save: $17.73 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Latch, Lock Actuator
- Position: Rear
- Replaced by: 13560691
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2021 Chevrolet Trailblazer | 4 DOOR EXT | 3 Cyl 1.2L, 3 Cyl 1.3L
View related parts
Chevrolet Trailblazer Latch Assembly, Rear S/D
Part Number: 13527387
$95.86 MSRP: $143.31
You Save: $47.45 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Latch, Lock Actuator
- Position: Rear
- Replaced by: 13560690
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2021 Chevrolet Trailblazer | 4 DOOR EXT | 3 Cyl 1.2L, 3 Cyl 1.3L
View related parts
Chevrolet Trailblazer Latch Assembly, Front S/D
Part Number: 13540564
$106.94 MSRP: $159.85
You Save: $52.91 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Latch, Lock Actuator
- Position: Front
- Replaced by: 13560689
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2021 Chevrolet Trailblazer | 4 DOOR EXT | 3 Cyl 1.2L, 3 Cyl 1.3L
View related parts
Chevrolet Trailblazer Latch Assembly, Front S/D
Part Number: 13535172
$109.06 MSRP: $163.05
You Save: $53.99 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Position: Front
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2021 Chevrolet Trailblazer | 4 DOOR EXT | 3 Cyl 1.2L, 3 Cyl 1.3L
View related parts
Chevrolet Trailblazer Latch Assembly, Front S/D
Part Number: 13527389
$44.66 MSRP: $66.76
You Save: $22.10 (34%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Latch, Lock Actuator
- Position: Front
- Replaced by: 13560676
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2021 Chevrolet Trailblazer | 4 DOOR EXT | 3 Cyl 1.2L, 3 Cyl 1.3L
View related parts
Chevrolet Trailblazer End Gate Latch Assembly
Part Number: 15778433
Product Specifications
- Other Name: Latch Assembly, End Gate ; Latch, End Gate Lock; Latch, Lock
- Replaces: 21998718, 15107195, 15133750
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004 Chevrolet Trailblazer | 4 DOOR, 4 DOOR EXT | 6 Cyl 4.2L, 8 Cyl 5.3L

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Chevrolet Trailblazer Door Lock Parts Questions & Experts Answers

Rear Side Door Lock Assembly
25948725
Q: How to operate and diagnose the power door lock system?
A: The power door lock system operates the door lock actuators in each door, with the system consisting of switches, actuators, Body Control Module (BCM), and associated wiring. Diagnosis typically involves checking the wiring connections and actuators for minor faults that can be easily repaired. The system is operated by bi-directional solenoids located in the doors, with lock switches having two positions: Lock and Unlock. These switches send a signal to the BCM, which then sends a signal to the door lock solenoids. It is important to check the circuit protection first, as some vehicles use a combination of circuit breakers and Fuses. If no voltage is present at the switches, the wiring between the fuse panel and switches should be checked for shorts and opens. If voltage is present, the switch should be tested for continuity, and if there is no continuity in both switch positions, it should be replaced and check the wiring between the switch and the door lock solenoid. If all but one lock solenoids operate, the trim panel from the affected door should be removed to check for voltage at the solenoid while the lock switch is operated; if the inoperative solenoid is receiving voltage, it should be replaced and if it isn't, an open or short in the wire between the lock solenoid and the relay should be checked. For the keyless entry remote, the battery should be replaced when the transmitter doesn't operate the locks at a distance of ten feet, with the normal range being about 30 feet. To replace the battery, the case halves should be carefully separated using a small screwdriver, and then the three-volt, lithium battery should be replaced before snapping the case halves together.

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