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HOMESERVICE MANUALSCHEVROLET2001SUBURBAN C1500REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 49 (ENGINE CONTROLS - 8.1L - DESCRIPTION AND OPERATION)DESCRIPTION AND OPERATIONPOWERTRAIN CONTROL MODULE DESCRIPTIONOUTPUT COMPONENTS
2001 Chevrolet Suburban C1500

Output Components

2001 Chevrolet Suburban C1500SECTION Output Components
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2001 GMC Yukon XL, 2001 GMC Sierra, 2001 GMC Cab & Chassis Sierra, 2001 GMC C3500 HD, and 2001 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Diagnose the output components for the proper response to PCM commands. Components where functional monitoring is not feasible will be monitored for circuit continuity and out-of-range values if applicable.

Output components to be monitored include, but are not limited to, the following circuits:

  • The evaporative emission (EVAP) system
  • The electronic transmission controls
  • The AC relay, if so equipped
  • The vehicle speed sensor (VSS) output
  • The malfunction indicator lamp (MIL) control
  • The cruise control enable, if so equipped
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.