2021 GMC Terrain SLFACTORY OEM SERVICE PROCEDURE

B111B Turbocharger Boost/Intake Air Temperature Sensor (LTG)

GM2487930Courtesy of GENERAL MOTORS COMPANY
Connector Part Information
  • Harness Type: Engine Harness
  • OEM Connector: 13343438
  • Service Connector: 13584423
  • Description: 4 -Way F 2.8 Series, Sealed (BK)
Terminal Part Information

Terminal Type ID Terminated Lead Diagnostic Test Probe Terminal Removal Tool
I Not required J-35616-35 (VT) No Tool Required
Pin Size Color Circuit Function Terminal Type ID Option
1 0.5 GY / RD 7332 Turbocharger Inlet Absolute Pressure Sensor 5 Volt Feedback Signal 2 I LTG
2 0.5 WH / BU 7329 Pre-Throttle Air Temperature Signal I LTG
3 0.5 BK / VT 7331 Turbocharger Inlet Absolute Pressure Sensor 5 Volt Reference 2 I LTG
4 0.5 VT / BU 7330 Turbocharger Inlet Absolute Pressure Sensor Signal 2 I LTG
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

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.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.