Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2025TRAILBLAZER ACTIV, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 1 (ENGINE MECHANICAL - 1.2L (LBP) - VISUAL IDENTIFICATION)VISUAL IDENTIFICATIONDISASSEMBLED VIEWSENGINE BLOCK AND COMPONENTS
2025 Chevrolet Trailblazer ACTIV, 4WD
Engine Block and Components
2025 Chevrolet Trailblazer ACTIV, 4WDSECTION Engine Block and Components
WARNING: This page is about a different variant/trim than selected.
| Callout | Component Name |
|---|---|
| 1 | Engine Block Oil Gallery Plug [2x] |
| 2 | Balancer Shaft |
| 3 | Engine Front Cover Locating Pin |
| 4 | Engine Block |
| 5 | Cylinder Head Locating Pin |
| 6 | Engine Coolant Heater |
| 7 | Engine Oil Pressure Sensor |
| 8 | Engine Block Oil Gallery Plug |
| 9 | Cylinder Head Locating Pin |
| 10 | Seal @ Engine Oil Pressure Sensor |
| 11 | Bolt @ Engine Coolant Heater |
| 12 | Engine Block Oil Gallery Plug |
| 13 | Engine Block Oil Gallery Plug |
| 14 | Balancer Shaft Weight |
| 15 | Balancer Shaft Weight Bolt |
| 16 | Crankshaft Rear Oil Seal Housing |
| 17 | Crankshaft Rear Oil Seal Housing Bolt [11x] |
| 18 | Engine Block Oil Gallery Plug |
| 19 | Transmission Locating Pin |
| 20 | Crankshaft Rear Oil Seal Housing Locating Pin |
| 21 | Starter Locating Pin [2x] |
| 22 | Crankshaft Rear Oil Seal Housing Locating Pin |
| 23 | Transmission Locating Pin |
| 24 | Crankshaft Position Sensor Reluctor Ring |
| 25 | Engine Block Oil Gallery Plug [2x] |
| 26 | Crankshaft Thrust Bearing |
| 27 | Piston Oil Nozzle Bolt [3x] |
| 28 | Piston Oil Nozzle [3x] |
| 29 | Crankshaft Upper Bearing [3x] |
| 30 | Crankshaft |
| 31 | Flywheel Locating Pin |
| 32 | Crankshaft Lower Bearing [4x] |
| 33 | Crankshaft Bearing Cap [4x] |
| 34 | Crankshaft Bearing Cap Bolt [8x] |
| 35 | Crankshaft Front Seal [2x] |
| 36 | Balancer Shaft Drive Gear |
| 37 | Crankshaft Position Sensor Bolt |
| 38 | Crankshaft Position Sensor |
| 39 | Crankshaft Sprocket |
| 40 | Piston Pin Retainer [3x] |
| 41 | Piston Pin [3x] |
| 42 | Connecting Rod Bearing [6x] |
| 43 | Connecting Rod Bearing Cap Bolt [6x] |
| 44 | Connecting Rod [3x] |
| 45 | Piston Pin Retainer [3x] |
| 46 | Piston [3x] |
| 47 | Piston Oil Ring [3x] |
| 48 | Piston Compression Lower Ring [3x] |
| 49 | Piston Compression Upper Ring [3x] |
| 50 | Knock Sensor Bolt |
| 51 | Knock Sensor |
| 52 | Engine Front Cover Locating Pin |
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.