What is the purpose of relays in Chevrolet Trailblazer and Buick Rainier's electrical system?

Several electrical accessories in a vehicle, such as the fuel injection system, horns, starter, and fog lamps, use relays to transmit the electrical signal to the component. Relays have a control circuit and a power circuit, with the control circuit opening and closing the power circuit. If a relay is defective, the component will not function. Most are found in the engine compartment or fuse boxes. To test, remove and check it for continuity using an ohmmeter. The terminals of ISO relays are numbered to indicate their circuit connections and functions.

Genuine Chevrolet Trailblazer Relay

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9 Relays found

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Chevrolet Trailblazer RELAY ASM,ACSRY TIME DELAY CUTOFF *GRAY
Part Number: 13500114
$9.30 MSRP: $19.52
You Save: $10.22 (53%)
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Product Specifications
- Replaces: 12193606, 19115080, 15328866, 12135034, 15393412, 12088567, 12135170, 19116057
- 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 Relay Asm,Multiuse *Gray
Part Number: 13503102
$7.65 MSRP: $15.80
You Save: $8.15 (52%)
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Product Specifications
- Replaces: 12177236, 12193614, 12088592, 12088576, 12135175, 12193604, 15328864
- 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 Relay,Headlamp
Part Number: 15016745
$35.74 MSRP: $67.44
You Save: $31.70 (47%)
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Product Specifications
- Other Name: RELAY, Headlamp/Fog Lamp/Turn Signal; Relay
- 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 Relay,Secondary Air Injection Pump
Part Number: 15319851
$34.58 MSRP: $65.24
You Save: $30.66 (47%)
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Product Specifications
- Other Name: RELAY, Emission Control System; Relay
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2009 Chevrolet Trailblazer | 4 DOOR | 6 Cyl 4.2L
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Chevrolet Trailblazer Flasher,Hazard Lamp & Turn Signal Lamp
Part Number: 15231201
$44.30 MSRP: $83.58
You Save: $39.28 (47%)
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Product Specifications
- Other Name: FLASHER, Chassis/Body Marker/Hazard; Flasher
- Replaces: 12450284, 15101912
- 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 RELAY ASM,WSW MOT *BLACK
Part Number: 13500126
$11.40 MSRP: $20.44
You Save: $9.04 (45%)
Ships in 1-3 Business Days
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Product Specifications
- Replaces: 92199311, 92181835, 12077866, 12135180, 15393413, 19115082, 15328867, 19116058
- 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 Relay Asm,Dr Lock <Use 1C5L8570A>
Part Number: 19119238
$47.16 MSRP: $70.20
You Save: $23.04 (33%)
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Product Specifications
- Other Name: RELAY, Door and End Gate Electrical; Actuator Relay, Lock Relay, Relay
- Replaces: 89027051, 12065122
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2009 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 Relay Asm,Blower Motor<See Guide/Contact Bfo>
Part Number: 84095360
$47.15 MSRP: $105.24
You Save: $58.09 (56%)
Ships in 1 Business Day
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Product Specifications
- Other Name: RELAY ASM,BLO MOT
- Replaced by: 19118886
- 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 Flasher,Hazard Lamp & Turn Signal Lamp
Part Number: 15231200
Product Specifications
- Other Name: FLASHER, Turn Signal Lamp
- 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

Chevrolet Trailblazer Relay Parts Questions & Experts Answers

Relay Asm,Blower Motor<See Guide/Contact Bfo>
84095360
Q: What is the purpose of relays in Chevrolet Trailblazer and Buick Rainier's electrical system?
A: Several electrical accessories in a vehicle, such as the fuel injection system, Horns, starter, and fog lamps, use relays to transmit the electrical signal to the component. Relays have a control circuit and a power circuit, with the control circuit opening and closing the power circuit. If a relay is defective, the component will not function. Most are found in the engine compartment or fuse boxes. To test, remove and check it for continuity using an ohmmeter. The terminals of ISO relays are numbered to indicate their circuit connections and functions.

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