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HOMESERVICE MANUALSGMC2009SAVANA G2500, VAN CARGO EXTENDED, 6.6 6REPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSELECTRICAL COMPONENT LOCATIONSWIRING SYSTEMS AND POWER MANAGEMENT - ELECTRICAL CENTER IDENTIFICATION, COMPONENT CONNECTOR & SPLICE PACK CONNECTOR END VIEWSCOMPONENT CONNECTOR END VIEWSCOOLANT HEATER (K08)
2009 GMC Savana G2500, Van Cargo Extended, 6.6 6

Coolant Heater (K08)

2009 GMC Savana G2500, Van Cargo Extended, 6.6 6SECTION Coolant Heater (K08)
Fig 1: Coolant Heater (K08) - Connector End View
GM655815Courtesy of GENERAL MOTORS CORP.
Coolant Heater (K08)

Pin Wire Circuit Function
A 2 RD/WH 1740 Battery Positive Voltage
B 0.5 TN 2501 High Speed GMLAN Serial Data Bus (-)
C 0.5 TN/BK 2500 High Speed GMLAN Serial Data Bus (+)
D 0.5 TN 2501 High Speed GMLAN Serial Data Bus (-)
E 0.5 TN/BK 2500 High Speed GMLAN Serial Data Bus (+)
F 0.8 D-BU/L-GN 7077 Coolant Heater - Fuel Pump Control
G - - Not Used
H 2 BK 150 Ground
J 0.5 L-BU 5986 Serial Data Communication Enable
K - - Not Used
Connector Part Information 
  • OEM: 15326660
  • Service: 15326660
  • Description: 10-Way F GT 280 5.8 Series Sealed (BK)
Terminal Part Information 
  • Pins: A, H
  • Terminal/Tray: 15304720/19
  • Core/Insulation Crimp: 4/5
  • Release Tool/Test Probe: 15315247/J-35616-4A (PU)
  • Pins: B-F, J
  • Terminal/Tray: 15304719/19
  • Core/Insulation Crimp: Pins B-E, J - E/5
  • Core/Insulation Crimp: Pins F - 2/5
  • Release Tool/Test Probe: 15315247/J-35616-4A (PU)
RENDER: 1.0x

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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.