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Suburban C2500, 5.7 K
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Section 5 (Engine Controls - Basic Testing - 7.4L)
Section 5 (Engine Controls - Basic Testing - 7.4L)
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This page is about a different variant/trim than selected.
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Model Identification
Introduction
Preliminary Inspection & Adjustments
Visual Inspection
Mechanical Inspection
Compression
Exhaust System Backpressure
Check At Oxygen Sensor
Diagnosis
A-3, No-Start Diagnosis
Definition
No Start - Engine Cranks Okay (HEI-Est)
General Inspection
Ignition System
Fuel System (TBI)
No Start - Engine Cranks Okay (Enhanced/High Value) Ignition System)
General Inspection
Ignition System
Fuel System (CPI)
A-7, Basic Fuel System Checks
Fuel System Pressure Relief
Notes
TBI Unit
Fuel System Pressure Test
Notes
TBI
Field Service Mode Check
C-4, Basic Ignition System Checks
HEI-Est Distributor
Notes
Spark
Ignition Coil Power Source
Ignition Coil Resistance
Distributor Pick-Up Coil Short & Resistance Checks
Tach Pulse (RPM) Signal
Idle Speed & Ignition Timing
Diagnostic Circuit Check
Diagnostic circuit check determines the following:
A-1, Malfunction Indicator Light (Mil) Inoperative
A-2, Mil Always On Or Won't Flash Code 12
Diagnostic Circuit Check & Work Flow
Summary
Wiring Diagrams
"C" & "K" Series Pickup, Sierra & Suburban - With A/T
"C" & "K" Series Pickup & Sierra - With M/T
"P" Series - Commercial Van & MOTORHOME
"P" Series - Cutaway
Van - With 4L80-E