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 X5
2009 Chevrolet Tahoe Base, 4.8 CSECTION Fuse Block - Underhood X5
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 X5
| Pin | Wire | Circuit | Function |
|---|---|---|---|
| A1 | - | - | Not Used |
| A2 | 0.5 L-BU/WH | 6311 | Brake Switch Signal |
| A3-A8 | - | - | Not Used |
| B1 | 0.35 L-BU/WH | 6311 | Brake Switch Signal |
| 0.35 L-BU/WH | 6311 | Brake Switch Signal | |
| B2 | 0.5 RD/WH | 740 | Battery Positive Voltage (except HP2) |
| B3 | 1 RD/WH | 340 | Battery Positive Voltage |
| 0.5 RD/WH | 340 | Battery Positive Voltage (without Y91) | |
| B4 | 0.5 RD/WH | 2640 | Battery Positive Voltage (ULT, 7X6 or EXP) |
| 0.8 RD/WH | 2640 | Battery Positive Voltage (ULT with T89) | |
| B5 | - | - | Not Used |
| C1-C3 | - | - | Not Used |
| C4 | 0.35 OG | 300 | Ignition Voltage |
| C5 | 0.35 OG | 300 | Ignition Voltage |
| C6 | 0.35 OG | 300 | Ignition Voltage (ULT) |
| C7 | - | - | Not Used |
| C8 | 0.35 D-BU | 45 | Park Lamp Relay Control |
| D1 | 0.35 RD/WH | 540 | Battery Positive Voltage |
| D2 | 0.35 RD/WH | 3340 | Battery Positive Voltage |
| D3 | - | - | Not Used |
| D4 | 0.35 BN | 141 | Ignition Voltage (KA9) |
| D5 | - | - | Not Used |
| E1 | - | - | Not Used |
| E2 | 3 RD/BK | 1242 | Battery Positive Voltage (E61) |
| F1 | 3 RD/BK | 1342 | Battery Positive Voltage (NP0 or NQH) |
| 3 RD/BK | 1342 | Battery Positive Voltage (NP0 or NQH) | |
| F2 | 5 RD/BK | 42 | Battery Positive Voltage |
| G1 | 1 BK | 550 | Ground |
| G2 | 0.35 PK | 1139 | Ignition Voltage |
| G3 | 0.35 PK | 239 | Ignition Voltage |
| G4 | 0.35 PK | 1639 | Ignition Voltage |
| 0.35 PK | 1639 | Ignition Voltage (without KA9) | |
| G5 | 0.35 PK | 739 | Ignition Voltage |
| 0.35 PK | 739 | Ignition Voltage (10 Series) | |
| H1 | 0.35 OG | 5186 | Left Trailer Turn Signal Lamp |
| H2 | 0.35 YE | 1618 | Trailer Left Rear Turn/Stop Lamp Supply Voltage (EXP) |
| H3 | 0.35 YE | 5187 | Right Trailer Turn Signal Lamp |
| H4 | 0.35 D-GN | 1619 | Trailer Right Rear Turn/Stop Lamp Supply Voltage (EXP) |
| H5 | 0.35 YE | 5199 | Run/Crank Relay Coil Control |
| H6-H7 | - | - | Not Used |
| H8 | 0.5 D-BU | 38 | Backup Lamp Relay Control |
| J1 | 1 PU | 92 | Windshield Wiper Motor High Speed Control |
| J2 | 1 D-GN | 95 | Windshield Washer Switch Signal |
| J3 | 1 L-BU | 6128 | Rear Closure Unlatch Motor Unlatch Control (E52) |
| J4 | - | - | Not Used |
| J5 | 0.35 PK | 839 | Ignition Voltage |
| K1 | 0.35 TN | 860 | Front Windshield Wiper Switch High Signal |
| K2 | - | - | Not Used |
| K3 | 0.35 GY | 91 | Windshield Wiper Switch Signal 2 |
| K4 | 0.35 D-GN | 5706 | Endgate Latch Relay Supply Voltage (E52) |
| K5 | 1 L-BU | 20 | Stop Lamp Supply Voltage/Stop Lamp Switch Signal |
| K6-K7 | - | - | Not Used |
| K8 | 0.35 YE | 5704 | Endgate Latch Relay Coil Control (E52) |
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.