How To Use This Section
WARNING: This page does not describe the selected car, but rather 28 other vehicles, including the 1995 Oldsmobile Silhouette, 1995 GMC Yukon, 1995 GMC Vandura Special, 1995 GMC Vandura, and 1995 GMC Suburban. However, it is still accessible from the selected car via links, so may be relevant.
Use this portion of article only AFTER performing these checks:
- Ensure on-vehicle diagnostics work (if equipped). Perform DIAGNOSTIC CIRCUIT CHECK in appropriate BASIC TESTING article below.
- Ensure PCM and MIL function properly.
- Ensure no trouble codes, except intermittent ones, are stored.
- BASIC TESTING - 2.2L
- BASIC TESTING - 3.1L
- BASIC TESTING - 3.8L
- BASIC TESTING - 4.3L
- BASIC TESTING - 5.0L
- BASIC TESTING - 5.7L
- BASIC TESTING - 7.4L
- Ensure fuel control system operates properly. Perform FIELD SERVICE MODE CHECK in BASIC TESTING article listed above.
- Perform fuel system pressure test.
- Visually inspect all systems.
After performing these checks, verify customer complaint, and locate correct symptom from among those listed in this article. Not all items listed under each symptom apply to all models and systems. These procedures normally recommend testing of a system or component on vehicle, such as EGR, EST, TCC, etc. See the appropriate SYSTEM/COMPONENT TESTING article for specific testing procedures.
- SYSTEM/COMPONENT TESTS - 2.2L
- SYSTEM/COMPONENT TESTS - 3.1L
- SYSTEM/COMPONENT TESTS - 3.8L
- SYSTEM/COMPONENT TESTS - 4.3L
- SYSTEM/COMPONENT TESTS - 5.0L
- SYSTEM/COMPONENT TESTS - 5.7L
- SYSTEM/COMPONENT TESTS - 7.4LNOTE: If PCM displays data but engine fails to start, see NO-START DIAGNOSIS in appropriate BASIC TESTING article below.
- BASIC TESTING - 2.2L
- BASIC TESTING - 3.1L
- BASIC TESTING - 3.8L
- BASIC TESTING - 4.3L
- BASIC TESTING - 5.0L
- BASIC TESTING - 5.7L
- BASIC TESTING - 7.4L