Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2001SUBURBAN C1500REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 2 (AUTOMATIC TRANSMISSION - 4L80-E - SERVICE, REPAIR AND DIAGNOSTICS)
2001 Chevrolet Suburban C1500
Section 2 (Automatic Transmission - 4L80-E - Service, Repair And Diagnostics)
2001 Chevrolet Suburban C1500SECTION Section 2 (Automatic Transmission - 4L80-E - Service, Repair And Diagnostics)
WARNING: This page is about a different variant/trim than selected.
- Specifications
- Transmission Fluid Temperature Sensor Specifications
- Fastener Tightening Specifications (4L80-E)
- Transmission General Specifications
- Fluid Capacity Specifications (4L80-E)
- Range Reference
- Shift Solenoid Valve State and Gear Ratio
- Shift Speed
- Transmission Range Switch Logic
- Transmission Fluid Pressure Manual Valve Position Switch Logic
- Line Pressure
- Component Resistance
- Schematic Wiring Routing Diagrams
- Component Locator
- Automatic Transmission Electronic Component Views (Internal)
- Disassembled Views
- Case and Associated Parts (1 of 3)
- Case and Associated Parts (2 of 3)
- Case and Associated Parts (3 of 3)
- Oil Pump Assembly
- Control Valve Body Assembly (1 of 2)
- Control Valve Body Assembly (2 of 2)
- Accumulator Assembly
- Overrun Clutch Assembly
- Fourth Clutch Assembly
- Forward Clutch Assembly
- Direct Clutch and Intermediate Sprag Assembly
- Intermediate Clutch Plates and Manual 2-1 Band Assembly
- Center Support and Gear Unit Assembly
- Parking Lock and Actuator Assembly
- Component Location
- Automatic Transmission Inline Harness Connector End View
- Automatic Transmission Internal Connector End Views
- Automatic Transmission Fluid Pressure Manual Valve Position Switch Connector, Wiring Harness Side
- 1-2 Shift Solenoid Valve Connector, Wiring Harness Side
- 2-3 Shift Solenoid Valve Connector, Wiring Harness Side
- Torque Converter Clutch Pulse Width Modulated (TCC PWM) Solenoid Valve Connector, Wiring Harness Side
- Pressure Control Solenoid Valve Connector, Wiring Harness Side
- Transmission Fluid Temperature (TFT) Sensor Connector, Wiring Harness Side
- Automatic Transmission Related Connector End Views
- Diagnostic Information and Procedures
- Diagnostic Starting Point - Automatic Transmission
- Powertrain On Board Diagnostic (OBD) System Check - Automatic Transmission
- Scan Tool Output Controls
- Scan Tool Data List
- Scan Tool Data Definitions
- Diagnostic Trouble Code (DTC) Type Definitions
- Diagnostic Trouble Code (DTC) List/Type
- Diagnostic Code Index
- DTC P0218
- DTC P0502
- DTC P0503
- DTC P0706
- DTC P0711
- DTC P0712
- DTC P0713
- DTC P0716
- DTC P0717
- DTC P0719
- DTC P0724
- DTC P0730
- DTC P0741
- DTC P0742
- DTC P0748
- DTC P0751
- DTC P0752
- DTC P0753
- DTC P0756
- DTC P0757
- DTC P0758
- DTC P1810
- DTC P1860
- DTC P1870
- DTC P1875
- Symptoms - Automatic Transmission
- Range Selector Displays Incorrect Range
- Tow/Haul Switch/Indicator Always On or Inoperative
- Transmission Fluid Level and Condition Check
- Line Pressure Check
- Road Test
- Torque Converter Diagnosis
- Flex Plate/Torque Converter Vibration Test
- Noise and Vibration Analysis
- Clutch Plate Diagnosis
- Engine Coolant/Water in Transmission
- Fluid Leak Diagnosis
- Case Porosity Repair
- Shift Solenoid Leak Test
- Transmission Fluid Cooler Flushing and Flow Test (J 45096)
- Transmission Fluid Cooler Flushing and Flow Test (J 35944-A)
- Automatic Transmission Fluid Leaks
- High Line Pressure
- Forward Motion in Neutral
- Inadequate Lubrication at Low Line or Heavy Loads
- Inadequate Lubrication
- Engine Stall in Neutral
- Loss of Power
- No Torque in Reverse and Third
- Transmission Overheats
- Transmission Overheats at WOT
- Low Line Pressure
- Engine Starts in Gear
- Shift Lever Indicates Wrong Gear
- No Gear Selection
- Loss of Drive
- No Park
- Remains in Park
- Difficult to Shift Out of Park
- Does Not Stay in Park
- No Reverse
- No First Gear - D1
- No Second Gear - D1
- No Overrun Braking - D1
- No Engine Braking - D1
- No First Gear - D2
- No Second Gear - D2
- No Overrun Braking - D2
- No Engine Braking - D2
- No Second Gear Engine Braking - D2
- No First Gear - D3
- No Second Gear - D3
- No Third Gear - D3
- No Overrun Braking - D3
- No Engine Braking - D3
- No First Gear - D4
- First Gear Only - D4
- First and Second Gear Only - D4
- Second Gear Only - D4
- Second and Third Gear Only - D4
- First and Fourth Gear Only - D4
- Third and Fourth Gear Only - D4
- No Second Gear - D4
- No Third Gear - D4
- No Fourth Gear - D4
- No Torque Converter Clutch Apply
- Soft Torque Converter Clutch Apply
- Torque Converter Clutch Slipping
- Torque Converter Clutch Stuck On
- Incorrect Torque Converter Clutch Apply or Release
- Converter Ballooning
- No Torque Multiplication
- Fluid Foaming
- Noise
- Engine Stall
- Vibration
- Oil Out the Vent Tube
- No Torque in Second Gear
- Second Gear Starts
- Third Gear Starts
- Fourth Gear Starts
- Erratic Shift Quality
- Transmission Slips
- Case Extension Bearing/Seal Failed
- Inaccurate Shift Points
- Harsh Shifts
- Harsh Shift D to R
- Harsh Shift 3 to 4
- Harsh Shift 4 to 3
- Harsh Shift D4 to D3, D2, or D1
- Soft Shifts
- Soft Shift into R
- Soft Shift R to D
- Soft Shift 2 to 1
- Soft Shift 2 to 3
- Soft Shift 3 to 2
- Soft Shift D3 to D2
- Delayed Shift 1 to 2
- No D2 to D1
- No D3 to D2
- Repair Instructions
- Shift Cable Adjustment
- Shift Cable Replacement
- Park/Neutral Position Switch Replacement
- Park/Neutral Position Switch Adjustment
- Automatic Transmission Fluid and Filter Replacement
- Transmission Fluid Filler Tube and Seal Replacement
- Vehicle Speed Sensor Replacement
- Park Pawl and Actuator Replacement
- Pressure Regulator Valve Replacement
- Torque Converter Clutch Valve and Spring Replacement
- Accumulator Housing Replacement
- Reverse Band Servo Piston Replacement
- Forward Band Servo Piston Replacement
- Oil Cooler Hose/Pipe Replacement
- Transmission Fluid Auxiliary Cooler Replacement
- Transmission Heat Shield Replacement
- Transmission Vent Hose Replacement
- Control Valve Body Replacement
- Transmission Mount Replacement
- Transmission Replacement
- Description and Operation
- Transmission General Information
- Transmission Identification Information
- Definitions and Abbreviations
- Transmission General Description
- Transmission Component and System Description
- Adapt Function
- Electronic Component Description
- Torque Converter Clutch Solenoid Valve
- Transmission Pressure Control Solenoid Valve - Force Motor
- 1-2 Shift Solenoid Valve
- 2-3 Shift Solenoid Valve
- Automatic Transmission Fluid Pressure Manual Valve Position Switch Assembly
- Automatic Transmission Input Shaft Speed, Output Shaft Speed Sensors
- Automatic Transmission Fluid Temperature Sensor Assembly
- Transmission Range Switch
- Automatic Transmission Electrical Connector Description
- Special Tools and Equipment
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.