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.
Fuse Block - Underhood X3
2009 Chevrolet Tahoe Base, 4.8 CSECTION Fuse Block - Underhood X3
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Fuse Block - Underhood X3
| Pin | Wire | Circuit | Function |
|---|---|---|---|
| A1 | 0.5 D-GN/WH | 1335 | Right Rear Turn Signal Lamp Supply Voltage (X88 or Z88 or EXP with E52) |
| 0.5 D-GN | 19 | Right Rear Stop/Turn Lamp Supply Voltage (X88 without E52 or Z75 without EXP) | |
| A2 | 0.5 YE/BK | 1334 | Left Rear Turn Signal Lamp Supply Voltage (X88 or Z88 or EXP with E52) |
| 0.5 YE | 18 | Left Rear Stop/Turn Lamp Supply Voltage (X88 without E52 or Z75 without EXP) | |
| A3 | 0.5 L-BU | 20 | Stop Lamp Supply Voltage (X88 or Z88 or EXP with E52) |
| A4 | 0.5 L-BU/BK | 20 | Stop Lamp Supply Voltage (X88 or Z88 or EXP with E52) |
| A5 | 0.5 RD/WH | 1840 | Battery Positive Voltage |
| A6 | - | - | Not Used |
| A7 | 0.5 BN | 2509 | Left Rear Park Lamps Supply Voltage |
| A8 | 0.5 BN | 2509 | Left Rear Park Lamps Supply Voltage (without E52) |
| B1 | 3 RD/BK | 2440 | Battery Positive Voltage (Z55) |
| B2 | 3 RD/WH | 2440 | Battery Positive Voltage (G69) |
| B3 | 2 RD | 1640 | Battery Positive Voltage (JL4) |
| B4 | 0.8 BN | 2109 | Trailer Park Lamp Supply Voltage (EXP) |
| 1 BN | 2109 | Trailer Park Lamp Supply Voltage (without EXP) | |
| B5 | 1 GY | 120 | Fuel Pump Supply Voltage (L96) |
| C1 | 3 RD | 1842 | Battery Positive Voltage (G69) |
| C2 | 3 RD/BK | 442 | Battery Positive Voltage |
| D1 | 5 RD/BK | 1742 | Battery Positive Voltage (JH6) |
| D2 | - | - | Not Used |
| E1 | 2 RD/WH | 4340 | Battery Positive Voltage (20 Series) |
| E2 | 0.8 L-GN | 1624 | Trailer Backup Lamps Supply Voltage (EXP) |
| 1 L-GN | 1624 | Trailer Backup Lamps Supply Voltage (except EXP) | |
| E3 | 0.5 L-GN | 24 | Backup Lamp Supply Voltage |
| 0.5 L-GN | 24 | Backup Lamp Supply Voltage (except EXP) | |
| E4 | 3 RD/WH | 1940 | Battery Positive Voltage (except L96) |
| E5 | - | - | Not Used |
| F1 | 0.8 YE | 1618 | Trailer Left Rear Turn/Stop Lamp Supply Voltage |
| F2 | 0.8 D-GN | 1619 | Trailer Right Rear Turn/Stop Lamp Supply Voltage |
| F3-F4 | - | - | Not Used |
| F5 | 0.5 PK | 439 | Ignition Voltage (without NQZ) |
| F6 | - | - | Not Used |
| F7 | 0.5 BN | 2609 | Right Rear Park Lamps Supply Voltage |
| F8 | 0.8 GY | 5185 | Right Trailer Park Lamp (EXP) |
Connector Part Information
Terminal Part Information
|
RENDER: 1.0x
NO RELATED
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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.