Junction Block - Left I/P X1 (except MEX)
WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Junction Block - Left I/P X1 (except MEX)
| Pin | Wire | Circuit | Function |
|---|---|---|---|
| A1 | 0.5 RD/WH | 4440 | Battery Positive Voltage |
| A2 | - | - | Not Used |
| A3 | 0.35 PK | 239 | Ignition 1 Voltage |
| 0.35 PK | 239 | Ignition 1 Voltage (NQF/NQH) | |
| A4 | 0.35 PK | 239 | Ignition 1 Voltage |
| 0.35 PK | 239 | Ignition 1 Voltage (HP2) | |
| 0.8 PK | 239 | Ignition 1 Voltage (PTO/EXP) | |
| A5 | 0.5 BK | 2550 | Ground (U42/UK6/Y91) |
| B1-B2 | - | - | Not Used |
| B3 | 1 BK | 2550 | Ground |
| B4 | 0.5 GY | 157 | Courtesy Lamp Control |
| B5 | - | - | Not Used |
| C1 | 0.35 PK | 1639 | Ignition 1 Voltage (DF5) |
| C2 | 0.5 BN/WH | 230 | Instrument Panel Lamps Dimming Control |
| 0.35 BN/WH | 230 | Instrument Panel Lamps Dimming Control (HP2 or AU3 without AN3) | |
| C3 | 0.5 BK | 2250 | Ground (U2K with Y91) |
| 0.5 BK | 2250 | Ground (UE1 with Y91) | |
| C4 | - | - | Not Used |
| C5 | 0.5 YE/BK | 5813 | Park Enable Supply Voltage (JF4 without AN3) |
| D1 | 2 RD/WH | 1340 | Battery Positive Voltage (A31/HP2) |
| D2 | - | - | Not Used |
| D3 | 0.35 BN/WH | 230 | Instrument Panel Lamps Dimming Control (Except MEX/8S8) |
| 0.5 BN/WH | 230 | Instrument Panel Lamps Dimming Control (HP2 or AU3 without AN3) | |
| D4-D5 | - | - | Not Used |
| E1 | 0.5 BK/WH | 1851 | Ground (XA7) |
| E2 | - | - | Not Used |
| E3 | 0.8 BK/WH | 1851 | Ground |
| 0.5 BK/WH | 1851 | Ground | |
| F1 | 5 RD/BK | 642 | Battery Positive Voltage (YE9/HP2) |
| G1 | - | - | Not Used |
| H1 | 0.5 BK/WH | 1851 | Ground |
| 0.5 BK/WH | 1851 | Ground | |
| J1 | - | - | Not Used |
| K1 | 0.5 BK/WH | 1851 | Ground |
| 0.35 BK/WH | 1851 | Ground | |
| K2 | 2 BK/WH | 1851 | Ground |
| K3 | 0.8 BK/WH | 1851 | Ground |
| 0.8 BK/WH | 1851 | Ground (EXP/HP2) | |
| L1 | 0.5 OG | 6815 | Inadvertent Power Control |
| L2 | 0.5 RD/WH | 240 | Battery Positive Voltage (YE9/Y91/HP2) |
| 0.5 RD/WH | 3040 | Battery Positive Voltage (5X7/5Y0/TRW/8S8 without YE9) | |
| L3 | 0.35 PU/WH | 6816 | Indicator Dimming Control |
| L4 | 0.35 WH/BK | 5515 | Inside Air Temperature Sensor Assembly Control (CJ2) |
| L5 | - | - | Not Used |
| M1 | 0.5 BN/WH | 230 | Instrument Panel Lamps Dimming Control |
| 0.5 BN/WH | 230 | Instrument Panel Lamps Dimming Control (HP2 with NQH) | |
| 0.35 BN/WH | 230 | Instrument Panel Lamps Dimming Control (NQF/NQH except HP2) | |
| M2 | 0.35 PK | 1691 | Low Reference (HP2 or DF5 with DL3/DR4) |
| M3 | 0.35 PU/WH | 6816 | Indicator Dimming Control |
| M4 | 0.35 D-GN | 734 | Inside Air Temperature Sensor Signal (CJ2) |
| M5 | 0.5 OG | 1054 | Stop Lamp Supply Voltage (except EXP) |
| 0.5 OG | 1054 | Stop Lamp Supply Voltage (except EXP) | |
| 0.5 L-BN | 1320 | Stop Lamp Supply Voltage (EXP) | |
| N1 | 0.35 D-GN | 6134 | Linear Interconnect Network Bus (YE9/Y91/HP2) |
| N2 | - | - | Not Used |
| N3 | 0.35 PU/WH | 6816 | Indicator Dimming Control (PTO) |
| N4 | - | - | Not Used |
| N5 | 0.35 PK | 1139 | Ignition 1 Voltage |
| 0.35 PK | 1139 | Ignition 1 Voltage (C99) | |
| P1 | 0.35 D-BU | 38 | Backup Lamp Relay Control (HP2/Early Production with YE9/Y91/Late Production except MEX) |
| 0.35 D-BU | 38 | Backup Lamp Relay Control (HP2/Late Production except MEX) | |
| P2 | 0.35 GY | 1690 | Automatic Day/Night Mirror Signal (HP2 or DF5 with DL3/DR4) |
| P3 | 0.35 PU/WH | 6816 | Indicator Dimming Control (NQF/NQH) |
| P4 | - | - | Not Used |
| P5 | 0.35 D-GN | 6101 | Low Reference (CJ2) |
Connector Part Information
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Terminal Part Information
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