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HOMESERVICE MANUALSCHEVROLET2025TRAILBLAZER LS, 1.2L ENG VIN PREPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSWIRING DIAGRAMSCOMPONENT CONNECTOR END VIEWS (K71-M81)COMPONENT CONNECTOR END VIEWSK111 FUEL PUMP DRIVER CONTROL MODULE (LBP)
2025 Chevrolet Trailblazer LS, 1.2L Eng VIN P

K111 Fuel Pump Driver Control Module (LBP)

2025 Chevrolet Trailblazer LS, 1.2L Eng VIN PSECTION K111 Fuel Pump Driver Control Module (LBP)
GM4162046Courtesy of GENERAL MOTORS COMPANY
Connector Part Information
  • Harness Type: Fuel Sender Wiring Harness
  • OEM Connector: 33222138
  • Service Connector: Service by Harness - See Part Catalog
  • Description: 46-Way F 1.2 OCS, 2.8, 6.3 CTS Series, Sealed (GY)
Terminal Part Information

Terminal Type ID Terminated Lead Diagnostic Test Probe Terminal Removal Tool
I Not required J-35616-16 (L-GN) No Tool Required
II Not required J-35616-35 (VT) No Tool Required
III Not required J-35616-42 (RD) No Tool Required
IV Not required J-35616-4A (PU) No Tool Required
Pin Size Color Circuit Function Terminal Type ID Option
1 1.5 WH / BN 4138 Fuel Pump Supply Voltage Phase 3 IV FWD+LBP
2 1.5 GY 120 Fuel Pump Control II FWD+LBP
3 - 4 - - - Not Occupied - -
5 0.5 BK / GY 3802 Fuel Composition Sensor Low Reference I LBP
6 - - - Not Occupied - -
7 0.5 BU / BN 4498 High Speed GMLAN Serial Data [+] 7 I LBP
8 0.5 WH 4499 High Speed GMLAN Serial Data [-] 7 I LBP
9 - - - Not Occupied - -
10 0.5 VT / GN 4320 Powertrain Sensor Bus Enable I LBP
11 0.5 GN / GY 465 Fuel Pump Primary Relay Control I LBP
12 - 13 - - - Not Occupied - -
14 1.5 BK 4450 Ground III LBP
15 0.5 BK 50 Ground I FWD+LBP
16 0.5 VT / BN 3803 Fuel Composition Sensor Signal I LBP
17 - 18 - - - Not Occupied - -
19 0.5 BN / RD 7445 Fuel Line Pressure Sensor 5V Reference I LBP
20 0.5 BU / WH 7446 Fuel Pressure Sensor Signal I LBP
21 0.35 BK / GN 6281 Fuel Level Sensor Low Reference I FWD+LBP
22 - - - Not Occupied - -
23 0.35 BK / BN 6284 Fuel Tank Pressure Sensor Low Reference I LBP
24 0.5 BK / GN 54 Evaporative Leak Check Tank Vapor Pressure Sensor Low Reference I LBP
25 0.5 GN / RD 69 Evaporative Leak Check Tank Vapor Pressure Sensor Voltage Reference I LBP
26 - 29 - - - Not Occupied - -
30 1.5 YE / GY 4137 Fuel Pump Supply Voltage Phase 2 IV FWD+LBP
31 - 34 - - - Not Occupied - -
35 0.5 BK / YE 7447 Fuel Pressure Sensor Low Reference I LBP
36 - - - Not Occupied - -
37 0.35 BU / VT 1589 Primary Fuel Level Sensor Signal I FWD+LBP
38 - - - Not Occupied - -
39 0.35 YE / RD 2709 Fuel Tank Pressure Sensor 5V Reference I LBP
40 0.35 BU / WH 890 Fuel Tank Pressure Sensor Signal I LBP
41 0.5 YE / BU 316 Evaporative Leak Check Tank Vapor Pressure Signal I LBP
42 - - - Not Occupied - -
43 0.5 WH / GN 332 Evaporative Leak Check Switching Valve Control I LBP
44 0.5 VT / WH 338 Evaporative Leak Check Pump Motor Control I LBP
45 - - - Not Occupied - -
46 1.5 RD / WH 5440 Battery Positive Voltage III LBP
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.