GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2006 🢒 Yukon XL Denali 🢒 Engine 🢒 Engine Cooling 🢒 Cooling System Connector End Views
Connector 1: Coolant Level Switch - 2500 Series
Connector 2: Cooling Fan - Left (1500 Series)
Connector 3: Cooling Fan - Right (1500 Series)
Connector 4: Engine Coolant Temperature (ECT) Sensor

Coolant Level Switch - 2500 Series
Object Number: 537107 Size: CH

Connector Part Information

  • OEM: 12052644
  • Service: See Catalog
  • Description: 2-Way F Metri-Pack 150 Series Sealed (GY)

Terminal Part Information

  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit

Coolant Level Switch - 2500 Series

Pin

Wire Color

Circuit No.

Function

A

L-GN

1478

Coolant Level Switch Signal

B

BK

550

Ground

Cooling Fan - Left (1500 Series)
Object Number: 1509935 Size: CH

Connector Part Information

  • OEM: 15454358
  • Service: 88987983
  • Description: 2-Way F 630 GT (BK)

Terminal Part Information

  • Terminal/Tray: 15455571/23
  • Core/Insulation Crimp: F/3
  • Release Tool/Test Probe: 15315247/J-35616-42 (RD)

Cooling Fan - Left (1500 Series)

Pin

Wire Color

Circuit No.

Function

A

YE

5358

Cooling Fan Motor Control

B

GY

532

Cooling Fan Motor Supply Voltage

Cooling Fan - Right (1500 Series)
Object Number: 1509935 Size: CH

Connector Part Information

  • OEM: 15454358
  • Service: 88987983
  • Description: 2-Way F 630 GT (BK)

Terminal Part Information

  • Terminal/Tray: 15455571/23
  • Core/Insulation Crimp: F/3
  • Release Tool/Test Probe: 15315247/J-35616-42 (RD)

Cooling Fan - Right (1500 Series)

Pin

Wire Color

Circuit No.

Function

A

BK

250

Ground

B

L-BU

409

Cooling Fan Motor Supply Voltage

Engine Coolant Temperature (ECT) Sensor
Object Number: 666646 Size: CH

Connector Part Information

  • OEM: 15336024
  • Service: 88987993
  • Description: 2-Way F GT 150 Series Sealed (BK)

Terminal Part Information

  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit

Engine Coolant Temperature (ECT) Sensor

Pin

Wire Color

Circuit No.

Function

1

BK

407

Low Reference

2

YE

410

ECT Sensor Signal