Poor Connection or Damaged Harness
Inspect PCM harness connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, poor terminal to wire connection and damaged harness.
Home/GMC/Pickup C2500/GMC Pickup C2500 (1985-2000)/Repair manual/Automatic Trans/Diagnosis - A/t: Wiring
Contents
Wiring diagrams Section: Automatic Trans- Overhaul & Testing - 700-R4/4L60: Specifications
- Overhaul & Testing - 700-R4/4L60: Overview
- Overhaul & Testing - 700-R4/4L60: Adjustments
- Overhaul & Testing - 700-R4/4L60: Diagnosis
- Overhaul & Testing - 700-R4/4L60: Removal & Installation
- Overhaul & Testing - 700-R4/4L60: Overhaul
- Overhaul & Testing - 700-R4/4L60: Maintenance
- Overhaul & Testing - 700-R4/4L60: Wiring
- Overhaul & Testing - 700-R4/4L60: NVH
- Overhaul & Testing - 700-R4/4L60: Application
- Overhaul & Testing - 700-R4/4L60: Other
- Automatic Transmission - Overhaul - 4L80-E: Specifications
- Automatic Transmission - Overhaul - 4L80-E: Overview
- Automatic Transmission - Overhaul - 4L80-E: Adjustments
- Automatic Transmission - Overhaul - 4L80-E: Diagnosis
- Automatic Transmission - Overhaul - 4L80-E: Removal & Installation
- Automatic Transmission - Overhaul - 4L80-E: Overhaul
- Automatic Transmission - Overhaul - 4L80-E: Maintenance
- Automatic Transmission - Overhaul - 4L80-E: Wiring
- Automatic Transmission - Overhaul - 4L80-E: Application
- Automatic Transmission - Overhaul - 4L80-E: Other
- Diagnosis - A/t: Specifications
- Diagnosis - A/t: Overview
- Diagnosis - A/t: Overhaul
- Diagnosis - A/t: Wiring
- Diagnosis - A/t: Application
- Diagnosis - A/t: Other
- Servicing - A/t: Specifications
- Servicing - A/t: Overview
- Servicing - A/t: Maintenance
- Servicing - A/t: Other
- Automatic Transmission - Diagnosis - 4L80-E: Overview
- Automatic Transmission - Diagnosis - 4L80-E: Application
- Automatic Transmission - Diagnosis - 4L80-E: Other
- Removal & Installation - A/t: Specifications
- Removal & Installation - A/t: Overview
- Removal & Installation - A/t: Other
- Abbreviations
- Accessory Drive Belts
- Adjustments
- Anti-Lock/traction Control
- Application
- Automatic Trans
- Automatic Transmission - Diagnosis - 4L80-E: Diagnosis
- Auxiliary Emission Control Systems
- Basic Trouble Shooting
- Brakes
- Charging System
- Check Lists
- Clutches Manual & Hydraulic
- Computer Relearn
- Cooling Fan
- Cooling System (Mechanical)
- Cruise Control Systems
- Diagnosis - A/t: Diagnosis
- Diagnostic Connector Locations
- Differentials & Drive Axles
- Door Locks & Anti-Theft Systems
- Driveline/axles
- Driveshaft & Universal Joints
- Electrical Component Locations
- Emission Applications
- Engine
- Engine Controls - Tests W/codes - V6: Diagnosis
- Engine Performance
- Fuses & Circuit Breakers
- Gauges & Instrument Panels
- General Servicing - All Makes
- Heated Glass/defoggers
- Heater
- Identification
- Manual & Power Steering
- Manual HVAC System
- Manual Trans
- Mechanical
- Mechanical - Hydraulic
- Metric Conversions
- Mirrors
- Pin Voltage Charts
- Procedures
- Removal & Installation
- Reset Procedures
- Rpo Codes
- Sensor Range Charts
- Specifications
- Starter
- Steering
- Steering Column
- Steering Column Switches
- Suspension Front
- Suspension Rear
- Testing & Diagnostics
- Theory & Operation
- Traction Control Disable
- Transfer Case
- Transmission
- Wheel Alignment
- Windows
- Wiper/washer Systems
- Wiring Diagrams - Engine Performance