Repair manual
GMC Pickup R2500 Repair Manual
Step-by-step repair and maintenance instructions for the GMC Pickup R2500 (1987–1989): removal, installation, adjustment, diagnostics and parameter checks with illustrations.
63sections
320articles
ENManual language
- MODEL IDENTIFICATION
- BASIC DIAGNOSTIC PROCEDURES
- CLEARING TROUBLE CODES
- Without "SCAN" Tester
- With "SCAN" Tester
- TROUBLE CODE DETERMINATION (HARD OR INTERMITTENT)
- Diagnostic Charts
- System Check
- Field Service Mode Check
- DIAGNOSTIC TOOLS
- Circuit Description
- Test Description
- Diagnostic Aids
- Fuel Module Check Procedure
- System Too Lean (High Air/Fuel Ratio)
- System Too Rich (Low Air/Fuel Ratio)
- Throttle Body
- A/C Compressor Relay Failure
- O2 Sensor Wire
- Fuel Contamination
- Fuel Pressure
- AIR System
- Circuit No. 413
- Sensor Harness
- HEI Shielding
- Canister Purge
- MAP Sensor
- Pressure Regulator
- TPS
- CODE 51 - FAULTY MEM-CAL (2.5L)
- CODE 51 - PROM PROBLEM (2.8L/4.3L/5.0L/5.7L/7.4L)
- CODE 52 - FUEL CALPAK MISSING (2.8L/4.3L/5.0L/5.7L/7.4L)
- CODE 53 - SYSTEM OVER VOLTAGE (2.5L)
- CODE 55 - ECM PROBLEM (2.8L/4.3L/5.0L/7.4L)
- Circuit Test Description
- A/C Compressor Or Relay Failure
- DESCRIPTION
- TCC CONTROL COMPONENTS
- Brake Switch
- Coolant Temperature Sensor
- Electronic Control Module (ECM)
- TCC Solenoid Assembly
- Throttle Position Sensor (TPS)
- Vacuum Sensor
- Vehicle Speed Sensor (VSS)
- 3rd & 4th Gear Switch
- TROUBLE SHOOTING
- Problem in Electronic Control Module
- Electrical Problems
- Valve Body Assembly
- Oil Pump Assembly
- CONVERTER CLUTCH APPLY SLIPPING, ROUGH OR SHUDDERS
- CONVERTER CLUTCH DOES NOT RELEASE
- DIAGNOSTIC TOOLS
- RETRIEVING TROUBLE CODES
- Entering ECM Diagnostic Mode
- CLEARING TROUBLE CODES
- ENTERING SERVICE (DIAGNOSTIC) MODE
- Reatta & Riviera
- Toronado
- DATA DISPLAYS
- INPUT DISPLAYS
- OUTPUT DISPLAYS
- TCC DIAGNOSTIC CHARTS
- CHART C-8, TORQUE CONVERTER CLUTCH - CARBURETED PASSENGER CARS (1 AND 2 OF 3)
- Diagnostic Aids
- CHART C-8, TORQUE CONVERTER CLUTCH - CARBURETED PASSENGER CARS (3 OF 3)
- CODE 24, VEHICLE SPEED SENSOR - CARBURETED PASSENGER CARS
- CHART C-8, TORQUE CONVERTER CLUTCH 2.0L & 2.5L TBI - A, J, N & P BODIES
- CODE 24, VEHICLE SPEED SENSOR 2.0L & 2.5L TBI - A, J & N BODIES (WITH PM GENERATOR)
- CODE 24, VEHICLE SPEED SENSOR 2.5L TBI - A BODY (WITH IN-DASH SPEED SENSOR)
- CODE 24, VEHICLE SPEED SENSOR 2.5L TBI - P BODY
- CHART C-1A, PARK/NEUTRAL SWITCH 2.0L & 2.5L TBI - A, J, N & P BODIES
- CHART C-8, TORQUE CONVERTER CLUTCH 2.0L (VIN 1) TBI - J & L BODIES
- CODE 24, VEHICLE SPEED SENSOR 2.0L (VIN 1) TBI - J BODY
- CODE 24, VEHICLE SPEED SENSOR 2.0L (VIN 1) TBI - L BODY
- CHART C-1A, PARK/NEUTRAL SWITCH 2.0L (VIN 1) TBI - J & L BODIES
- CHART C-8, TORQUE CONVERTER CLUTCH 4.3L & 5.0L (VIN E) TBI B, F & G BODIES (1 OF 2)
- CHART C-8, TORQUE CONVERTER CLUTCH 4.3L & 5.0L (VIN E) TBI B, F & G BODIES (2 OF 2)
- CODE 24, VEHICLE SPEED SENSOR 4.3L TBI - B & G BODIES
- CODE 24, VEHICLE SPEED SENSOR 5.0L (VIN E) TBI - F BODY
- CHART C-1A, PARK/NEUTRAL SWITCH 4.3L & 5.0L (VIN E) TBI - B, F & G BODIES
- CHART C-8, TORQUE CONVERTER CLUTCH 2.0L PFI - J & N BODIES
- CODE 24, VEHICLE SPEED SENSOR 2.0L PFI - J & N BODIES
- CHART C-1A, PARK/NEUTRAL SWITCH 2.0L PFI - J & N BODIES
- CHART C-8, TORQUE CONVERTER CLUTCH 2.3L PFI - N BODY
- CODE 24, VEHICLE SPEED SENSOR 2.3L PFI - N BODY
- CHART C-1A, PARK/NEUTRAL SWITCH 2.3L PFI - N BODY
- CHART C-8, TORQUE CONVERTER CLUTCH 2.8L PFI - A, J, L & P BODIES
- CHART C-8, TORQUE CONVERTER CLUTCH 2.8L PFI A & W BODIES WITH 440-T4 (1 OF 2)
- CHART C-8, TORQUE CONVERTER CLUTCH 2.8L PFI A & W BODIES WITH 440-T4 (2 OF 2)
- CHART C-8, TORQUE CONVERTER CLUTCH 2.8L, 5.0L & 5.7L PFI - F BODY (1 OF 2)
- CHART C-8, TORQUE CONVERTER CLUTCH 2.8L, 5.0L & 5.7L PFI - F BODY (2 OF 2)
- CHART C-8, TORQUE CONVERTER CLUTCH 5.7L PFI - Y BODY (1 OF 2)
- CHART C-8, TORQUE CONVERTER CLUTCH 5.7L PFI - Y BODY (2 OF 2)
- CODE 24, VEHICLE SPEED SENSOR 2.8L, 5.0L & 5.7L PFI A, F, J, P & Y BODIES
- CODE 24, VEHICLE SPEED SENSOR 2.8L PFI - L & W BODIES
- CHART C-1A, PARK/NEUTRAL SWITCH 2.8L, 5.0L & 5.7L PFI A, F, J, L, P, W & Y BODIES
- CHART C-1, ECM QUAD-DRIVER CHECK 2.8L PFI - F & P BODIES
- CHART C-8, TORQUE CONVERTER CLUTCH 3.0L PFI - N BODY
- CHART C-8, TORQUE CONVERTER CLUTCH 3.8L PFI - A, C & H BODIES (1 OF 2)
- CHART C-8, TORQUE CONVERTER CLUTCH 3.8L PFI - A, C & H BODIES (2 OF 2)
- CHART C-8, TORQUE CONVERTER CLUTCH 3.8L PFI (TURBO) - G BODY
- CODE 24, VEHICLE SPEED SENSOR 3.0L & 3.8L PFI - A, C, G & H BODIES
- CHART C-1A, PARK/NEUTRAL SWITCH 3.0L & 3.8L PFI - A, C, G & H BODIES
- CHART C-8, TORQUE CONVERTER CLUTCH 3.8L "3800" PFI BONNEVILLE, ELECTRA & NINETY-EIGHT (1 OF 2)
- CHART C-8, TORQUE CONVERTER CLUTCH 3.8L "3800" PFI BONNEVILLE, ELECTRA & NINETY-EIGHT (2 OF 2)
- CODE 24, VEHICLE SPEED SENSOR 3.8L "3800" PFI BONNEVILLE, ELECTRA & NINETY-EIGHT
- CODE 31, PARK/NEUTRAL SWITCH 3.8L "3800" PFI BONNEVILLE, ELECTRA & NINETY-EIGHT
- CHART C-8, TORQUE CONVERTER CLUTCH 3.8L "3800" PFI REATTA, RIVIERA & TORONADO
- CODE EO24, VEHICLE SPEED SENSOR 3.8L "3800" PFI REATTA, RIVIERA & TORONADO
- CODE EO27, EO28, & EO29 2ND, 3RD & 4TH GEAR SWITCH 3.8L "3800" PFI REATTA, RIVIERA & TORONADO
- CODE EO31, PARK/NEUTRAL SWITCH 3.8L "3800" PFI REATTA, RIVIERA & TORONADO
- CODE EO38, BRAKE SWITCH 3.8L "3800" PFI REATTA, RIVIERA & TORONADO
- CODE EO39, TORQUE CONVERTER CLUTCH 3.8L "3800" PFI REATTA, RIVIERA & TORONADO
- CODE B124, VEHICLE SPEED SENSOR 3.8L "3800" PFI REATTA, RIVIERA & TORONADO
- Note On Intermittents
- CODE B127, GEAR SELECTOR SWITCH 3.8L "3800" PFI - TORONADO
- Circuit Description
- Test Description