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HOMESERVICE MANUALSCHEVROLET2025TRAILBLAZER ACTIV, FWDREPAIR 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 ACTIV, FWD

K111 Fuel Pump Driver Control Module (LBP)

2025 Chevrolet Trailblazer ACTIV, FWDSECTION 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.