LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 220 (ENGINE CONTROLS - BASIC DIAGNOSTIC PROCEDURES - 6.0L W/BiFuel & CNG ENGINES) >> No-Start Diagnosis >> No-Start - Engine Cranks Okay >> Diagnostic Procedures

Diagnostic Procedures

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Savana, 2003 Chevrolet Silverado, and 2003 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform fuel system checks. Test for proper fuel pump relay operation. Test for proper fuel system pressures. Go to FUEL SYSTEM PRESSURE TEST  under FUEL SYSTEMS. Test for an accurate fuel indication from the Fuel Tank Pressure (FTP) sensor. Refer to DIAGNOSTIC TROUBLE CODE DEFINITIONS in SELF-DIAGNOSTICS - 6.0L CHEVY EXPRESS & SAVANA - BI-FUEL & CNG article or DIAGNOSTIC TROUBLE CODE DEFINITIONS in SELF-DIAGNOSTICS - 6.0L SIERRA & SILVERADO - BI-FUEL & CNG article.
  2. Perform sensor checks:
    • Test ECT sensor for proper operation by performing the following: Allow engine temperature to reach ambient air temperature by leaving engine off for several hours or overnight for most accurate results. Turn ignition on, with engine off. Using a scan tool, compare ECT and IAT sensors displayed temperature. The sensors should be within 5°F (3°C) of each other. Replace ECT sensor or repair ECT sensor circuit, if ECT is not about the expected value.
    • Test TP sensor for proper operation. With throttle blade at full rest position, the monitored TP sensor voltage on a scan tool should be less than 0.85 volt. If TP sensor is not about the expected voltage, check for a faulty TP sensor, faulty TP sensor circuit, or sticking throttle shaft or linkage/cable assembly.
    • Test for proper operation of the Crankshaft Position (CKP) sensor. For testing procedures and specifications, perform appropriate diagnostic test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS in SELF-DIAGNOSTICS - 4.8L, 5.3L & 6.0L "C", "K" & "N" SERIES - FLEX FUEL & GASOLINE article or DIAGNOSTIC TROUBLE CODE DEFINITIONS in SELF-DIAGNOSTICS - 4.8L, 5.3L & 6.0L EXPRESS & SAVANA - GASOLINE article.
    • Test for proper operation of the MAP sensor (if equipped). For testing procedures and specifications, perform appropriate diagnostic test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS in SELF-DIAGNOSTICS - 4.8L, 5.3L & 6.0L "C", "K" & "N" SERIES - FLEX FUEL & GASOLINE article or DIAGNOSTIC TROUBLE CODE DEFINITIONS in SELF-DIAGNOSTICS - 4.8L, 5.3L & 6.0L EXPRESS & SAVANA - GASOLINE article.
scientia non olet · About LEMON Manuals