How to replace the harmonic balancer on Chevrolet Trailblazer?

The replacement process of the crankshaft balancer begins by removing both the Radiator and the Drive Belt. The maintenance team needs to unscrew the balancer bolt while throwing it away and follow by taking out the service slot plug. The crankshaft balancer instability results from its lack of key-way so it could spin during tightening which creates improper torque. Lower the vehicle by placing the en 46547 (Flywheel Holding Tool) between Flywheel teeth. You can remove the balancer by using j 41816-2 (Crankshaft End Protector) and j 41816-a (Crankshaft Balancer Remover). Keep the outer rim of the crankshaft balancer free from pulling forces during the process. Remove the crankshaft balancer shim from the crankshaft snout by taking away the puller along with j 41816-a. The crankshaft balancer needs cleaning while an inspection occurs. Install the new crankshaft balancer shim gm p/n 12578073 by raising the vehicle at a specific height before setting the shim directly against the crankshaft gear on the crankshaft snout. The en-48034 (Harmonic Balancer installer) enables installation and seating of the crankshaft balancer before removing the tool. Position the Flywheel and put in the balancer washer along with a new bolt before torquing it to 150 nm (110 lb ft). The j 45059 (Torque Angle Meter) should be utilized to tighten the balancer bolt 180 degrees past initial torque specifications. First remove the torque converter holding tool then install the torque converter access plug into the Oil Pan and lower the vehicle before reinstallation of both the Drive Belt and Radiator.

OEM Chevrolet Trailblazer Harmonic Balancer

Engine Harmonic Balancer

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6 Harmonic Balancers found

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Chevrolet Trailblazer Vibration Damper Part Number: 12571619
$113.11 MSRP: $186.33
You Save: $73.22 (40%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Pulley; Harmonic Balancer; Balancer
- Replaced by: 12578069
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002-2004 Chevrolet Trailblazer | LS, LT, LTZ, North Face | 6 Cyl 4.2 L GAS
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Chevrolet Trailblazer Vibration Damper Part Number: 55512745
$42.24 MSRP: $66.15
You Save: $23.91 (37%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Pulley; Harmonic Balancer; Balancer; Balancer, Engine Crankshaft
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2021-2023 Chevrolet Trailblazer | L, LS, LT | 3 Cyl 1.2 L GAS
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Chevrolet Trailblazer Balancer Part Number: 25203989
$43.29 MSRP: $67.80
You Save: $24.51 (37%)
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Product Specifications
- Other Name: Pulley; Balancer, Engine Crankshaft
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2024 Chevrolet Trailblazer | LS, LT | 3 Cyl 1.2 L GAS
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Chevrolet Trailblazer Vibration Damper Part Number: 12707253
$58.18 MSRP: $91.13
You Save: $32.95 (37%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Pulley; Harmonic Balancer; Balancer; Balancer, Engine Crankshaft
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2021-2024 Chevrolet Trailblazer | ACTIV, LS, LT, RS | 3 Cyl 1.3 L GAS
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Chevrolet Trailblazer Vibration Damper Part Number: 12634105
Product Specifications
- Other Name: Pulley; Harmonic Balancer; Crankshaft Balance; Balancer
- Replaces: 12576652, 12553112
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006-2009 Chevrolet Trailblazer | Base, LS, LT, SS | 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L GAS
View related parts
Chevrolet Trailblazer Vibration Damper Part Number: 12578069
$118.42 MSRP: $186.33
You Save: $67.91 (37%)
Product Specifications
- Other Name: Pulley; Harmonic Balancer; Balancer; Balancer, Engine Crankshaft And Camshaft Balancer
- Replaces: 12571619
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002-2009 Chevrolet Trailblazer | Base, LS, LT, LTZ, North Face | 6 Cyl 4.2 L GAS

Chevrolet Trailblazer Harmonic Balancer

Want to cut long-term maintenance and repair costs? Choose OEM Harmonic Balancer. Those parts deliver top durability you can trust. On our site, you'll find a huge catalog of genuine Chevrolet Trailblazer parts. Prices are unbeatable, so you can keep more in your pocket. Every OEM Chevrolet Trailblazer Harmonic Balancer includes a manufacturer's warranty. You can also get an easy return policy that keeps buying risk free. Fast delivery, get your car on the road quickly. It's simple to search, compare, and order. Stop guessing about quality or fit. Order today and save with parts that last.

In Chevrolet Trailblazer cars, the Harmonic Balancer is vital as it holds the engine and absorbs vibrations resulting from the combustion. This one is called a vibration damper and consists of a metal hub connected to the crankshaft, a thick metal inertia ring and a rubber ring which can flex and thus counteract twisting motion. Extended time under heat and if fluids are applied, it wears off the rubber part and may cause over vibrations and may lead to crankshafte. An extended range of Harmonic Balancers may be installed on Chevrolet Trailblazer models: a standard version of the original equipment and high-performance modifications. While standard balancers are intended for factory engine specifications, the performance harmonic balancers are made to endure the vibrations generated from high modified engines in all RPM ranges. Such options include the standard, viscous fluid, and multi-piece kinematics that have been tried and proved for safety and efficiency in performance.

Chevrolet Trailblazer Harmonic Balancer Parts and Q&A

Vibration Damper
12578069
Q: How to replace the harmonic balancer on Chevrolet Trailblazer?
A:
The replacement process of the crankshaft balancer begins by removing both the Radiator and the Drive Belt. The maintenance team needs to unscrew the balancer bolt while throwing it away and follow by taking out the service slot plug. The crankshaft balancer instability results from its lack of key-way so it could spin during tightening which creates improper torque. Lower the vehicle by placing the en 46547 (Flywheel Holding Tool) between Flywheel teeth. You can remove the balancer by using j 41816-2 (Crankshaft End Protector) and j 41816-a (Crankshaft Balancer Remover). Keep the outer rim of the crankshaft balancer free from pulling forces during the process. Remove the crankshaft balancer shim from the crankshaft snout by taking away the puller along with j 41816-a. The crankshaft balancer needs cleaning while an inspection occurs. Install the new crankshaft balancer shim gm p/n 12578073 by raising the vehicle at a specific height before setting the shim directly against the crankshaft gear on the crankshaft snout. The en-48034 (Harmonic Balancer installer) enables installation and seating of the crankshaft balancer before removing the tool. Position the Flywheel and put in the balancer washer along with a new bolt before torquing it to 150 nm (110 lb ft). The j 45059 (Torque Angle Meter) should be utilized to tighten the balancer bolt 180 degrees past initial torque specifications. First remove the torque converter holding tool then install the torque converter access plug into the Oil Pan and lower the vehicle before reinstallation of both the Drive Belt and Radiator.