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HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 143 (AUTOMATIC TRANSAXLE DIAGNOSIS - 4T65-E)REMOVAL & INSTALLATIONPOWERTRAIN CONTROL MODULEINSTALLATION
1999 GMC Forward Control 5.7 R, Automatic

Powertrain Control Module: Installation

1999 GMC Forward Control 5.7 R, AutomaticSECTION Installation
WARNING: This page is about a different car, the 2003 Buick Regal and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the PCM to the PCM electrical connectors. Tighten the connectors to specification. See TORQUE SPECIFICATIONS  .
  2. Install the PCM and the wiring harness to the air cleaner housing assembly (3).
  3. Install the air cleaner housing cover (1). See Fig 1 .
  4. Install the air cleaner housing cover screws (2). Tighten the screws to specification. See TORQUE SPECIFICATIONS  .
  5. Install the air cleaner intake duct.
  6. Install the left front inner fender brace.
  7. Connect the negative battery cable.
  8. The new PCM must be programmed. See appropriate article in ENGINE PERFORMANCE.
Fig 1: Removing & Installing PCM
G00075716Courtesy of GENERAL MOTORS CORP.
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:

  • • 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.