2025 Chevrolet Trailblazer Electrical Parts

This table covers the alternators that charge the battery and run the electrical load. Typical signs include dim lights at idle, a battery lamp, or a growl from the charging pulley. Load-test the battery and inspect the belt and grounds — a bad ground mimics a failed alternator. Read more

GM GENUINE supplies both parts for the 2025 Chevrolet Trailblazer.

Listed part numbers: GM GENUINE 42911850 and GM GENUINE 42911849.

This table covers the Alternator / Generator bolts. Read more

This group shows a single part: GM GENUINE 11611102.

This table covers the Anti-Theft control modules. Read more

This group shows a single part: GM GENUINE 13520524.

This table covers the batteries listed by group size and specification. Typical signs include slow cranking, a battery lamp, or a no-start after the vehicle sat overnight. Confirm group size and terminal layout in the notes. Clean the posts and the ground before condemning the battery. Read more

5 Battery parts for the 2025 Chevrolet Trailblazer come from 4 brands — ACDELCO, DEKA, EXIDE and 1 other brand. The "Popular" part is DEKA 9A48. Every part fits both the 1.2L L3 Turbocharged and the 1.3L L3 Turbocharged.

Listed part numbers: DEKA 9A48, ACDELCO 48AGM and ACDELCO 48AGMHR, plus the other parts above.

This table covers the positive and ground cables that run from the battery. Typical signs include a stretched or frayed cable, or a control that no longer reaches the end of its travel. Route the new cable through the same clips. A kinked cable binds and fails early. Read more

GM GENUINE supplies both parts for the 2025 Chevrolet Trailblazer.

Part numbers include GM GENUINE 42776668 and GM GENUINE 42776666.

This table covers the body-control modules that run lighting, locks and wipers. Read more

GM GENUINE supplies both parts for the 2025 Chevrolet Trailblazer. All of them fit every engine offered in the 2025 Trailblazer.

This group includes GM GENUINE 22940857 and GM GENUINE 13534192.

This table covers the brackets that mount the Body Control Module (BCM). Typical signs include a cracked mount, a rattle, or a bracket that no longer holds alignment. Confirm position in the notes. Many brackets look alike and bolt to different corners. Read more

One part is listed for the 2025 Chevrolet Trailblazer — GM GENUINE 60004851.

This table covers the resettable circuit breakers in this vehicle's electrical system. Read more

This group shows a single part: GM GENUINE 84098784.

This table covers the engine-control modules that run fuel, spark and emissions. Read more

GM GENUINE supplies the 3 Engine Control Module (ECM Computer) parts for the 2025 Chevrolet Trailblazer. 1 part fits every engine; the other 2 are engine-specific.

Part numbers include GM GENUINE 12733825, GM GENUINE 42553328 and GM GENUINE 12725787.

This table covers the brackets that mount the Engine Control Module (ECM Computer). Typical signs include a cracked mount, a rattle, or a bracket that no longer holds alignment. Confirm position in the notes. Many brackets look alike and bolt to different corners. Read more

GM GENUINE supplies both parts for the 2025 Chevrolet Trailblazer. 1 part fits every engine; the other 1 is engine-specific.

Part numbers include GM GENUINE 42766893 and GM GENUINE 42766894.

This table covers the replacement fuses for this vehicle's fuse boxes. Typical signs include one circuit dead while its neighbor still works, or a fuse that blows again as soon as you replace it. Match amperage and fuse type. A repeat blow means a short — find it before the next fuse. Read more

27 Fuse parts for the 2025 Chevrolet Trailblazer come from 2 brands — GM GENUINE and ACDELCO. The "Popular" part is GM GENUINE 12004008. Grades run from 10 Amp through 70 Amp; 15 Amp is the most populated section, led by GM GENUINE and ACDELCO.

This table covers the Hands Free Vehicle Access modules. Typical signs include a cluster of unrelated faults, a no-communication code, or a module that will not sleep. Confirm power, ground and programming compatibility in the notes. Modules are rarely plug-and-play across years. Read more

One part is listed for the 2025 Chevrolet Trailblazer — GM GENUINE 85039379.

This table covers the Hands Free Vehicle Access sensors. Typical signs include a warning lamp, a stored code, or a reading that drops out when the harness is wiggled. Inspect the connector and ground before replacing the sensor — wiring faults are often condemned as bad sensors. Read more

One part is listed for the 2025 Chevrolet Trailblazer — GM GENUINE 85518160.

This table covers the horns mounted in the front of the vehicle. Read more

This group shows a single part: GM GENUINE 60008889.

This table covers the receivers that pick up the key-fob unlock signal. Read more

GM GENUINE supplies the 3 Keyless Entry Module / Receiver parts for the 2025 Chevrolet Trailblazer. All of them fit every engine offered in the 2025 Trailblazer.

Listed part numbers: GM GENUINE 13540045, GM GENUINE 13558725 and GM GENUINE 13558722.

This table covers the key fobs that lock, unlock and start the vehicle. Read more

5 Keyless Entry Remote parts are listed for the 2025 Chevrolet Trailblazer, from GM GENUINE and DORMAN. GM GENUINE 13530712 carries the "Popular" badge. All of them fit every engine offered in the 2025 Trailblazer.

This group includes GM GENUINE 13530712, DORMAN 99756ST and GM GENUINE 13547829 and the remaining parts above.

This table covers the Park Assist (PAS) Camera modules. Typical signs include a cluster of unrelated faults, a no-communication code, or a module that will not sleep. Confirm power, ground and programming compatibility in the notes. Modules are rarely plug-and-play across years. Read more

This group shows a single part: GM GENUINE 84716060.

This table covers the ultrasonic park-aid sensors in the bumper. Typical signs include a warning lamp, a stored code, or a reading that drops out when the harness is wiggled. Inspect the connector and ground before replacing the sensor — wiring faults are often condemned as bad sensors. Read more

3 Parking Aid Sensor parts are listed for the 2025 Chevrolet Trailblazer, from TECHPRO and GM GENUINE. All of them fit every engine offered in the 2025 Trailblazer.

Listed part numbers: GM GENUINE 84586217, TECHPRO GM1175105 and TECHPRO GM1175107.

This table covers the totally-integrated power modules that distribute body electrical power. Typical signs include a cluster of unrelated faults, a no-communication code, or a module that will not sleep. Confirm power, ground and programming compatibility in the notes. Modules are rarely plug-and-play across years. Read more

3 Power Supply Module (TIPM) parts for the 2025 Chevrolet Trailblazer come from GM GENUINE. Every part fits both the 1.2L L3 Turbocharged and the 1.3L L3 Turbocharged.

This group includes GM GENUINE 13510484, GM GENUINE 42771516 and GM GENUINE 42771517.

This table covers the Serial Data Gateway modules. Typical signs include a cluster of unrelated faults, a no-communication code, or a module that will not sleep. Confirm power, ground and programming compatibility in the notes. Modules are rarely plug-and-play across years. Read more

One part is listed for the 2025 Chevrolet Trailblazer — GM GENUINE 13542838.

This table covers the Side Object Sensor modules. Typical signs include a cluster of unrelated faults, a no-communication code, or a module that will not sleep. Confirm power, ground and programming compatibility in the notes. Modules are rarely plug-and-play across years. Read more

GM GENUINE supplies both parts for the 2025 Chevrolet Trailblazer. All of them fit every engine offered in the 2025 Trailblazer.

This group includes GM GENUINE 84182642 and GM GENUINE 84182643.

This table covers the speed sensors on the transmission, transfer case or ABS ring. Typical signs include a dead speedometer, harsh transmission shifts, or a code for vehicle speed. Inspect the tone wheel and the connector before replacing the sensor. Read more

6 Speed Sensor parts for the 2025 Chevrolet Trailblazer come from 2 brands — GM GENUINE and STANDARD MOTOR PRODUCTS. The "Popular" part is GM GENUINE 24295280. 5 parts fit every engine; the other 1 is engine-specific.

This group includes GM GENUINE 24295280, GM GENUINE 24298199 and GM GENUINE 24287098 and the remaining parts above.

This table covers the Speed Sensor Reluctor rings. Read more

2 Speed Sensor Reluctor Ring parts for the 2025 Chevrolet Trailblazer come from GM GENUINE. 1 part fits every engine; the other 1 is engine-specific.

This group includes GM GENUINE 24061032 and GM GENUINE 24230744.

This table covers the starter motors that crank the engine. Typical signs include no motion, a squeal, or a motor that only runs on one speed. Confirm power, ground and the control module before replacing the motor. Read more

3 Starter Motor parts are listed for the 2025 Chevrolet Trailblazer, from GM GENUINE and WAI GLOBAL.

Listed part numbers: GM GENUINE 25208828, GM GENUINE 12697399 and WAI GLOBAL 19362N.