Glow Plug/Intake Heater Relay Assembly

2001 Chevrolet Suburban C1500SECTION Glow Plug/Intake Heater Relay Assembly
WARNING: This page is about a different car, the 2001 GMC Sierra, 2001 GMC Cab & Chassis Sierra, 2001 Chevrolet Silverado, and 2001 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Glow Plug/Intake Heater Relay Assembly

GM2074408
Connector Part Information
  • FW-C-4F-B
  • 4-Way F (BLK)
Pin Wire Color Circuit No. Function
A YEL 505 Glow Plug Relay Control
B PNK/YEL - Ground
C PPL 985 IA Heater Relay Control
D PNK 539 Ignition Voltage
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:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.