Mechanical Inspection: Compression
WARNING: This page does not describe the selected car, but rather 33 other vehicles, including the 2002 Saturn Vue, 2002 Pontiac Montana, 2002 Pontiac Aztek, 2002 Oldsmobile Silhouette, and 2002 Oldsmobile Bravada. However, it is still accessible from the selected car via links, so may be relevant.
Check engine mechanical condition with compression gauge, vacuum gauge, or engine analyzer. See engine analyzer manual for specific instructions. For compression specifications, see SERVICE & ADJUSTMENT SPECIFICATIONS - TRUCKS article.
WARNING:
Fuel injectors on many models are triggered by ignition switch during cranking mode. DO NOT use ignition switch during compression tests. Use remote starter to crank engine to prevent fire hazard or contamination of engine's oiling system.