A good rule of thumb is that at idle (warm engine) the oil pressure should be between 10 and 20 PSI. At higher RPMs (e.g., 2000-2500), the pressure should be significantly higher, typically in the 30-50 PSI range.
However, you should consult your owner's manual for the specific oil pressure specifications for your Tahoe's engine. The manual will provide the most accurate information and may include a chart showing pressure ranges at different RPMs and temperatures. Failing that, a reputable repair shop or mechanic can provide guidance. Don't rely solely on general ranges. Low or high oil pressure can indicate serious engine problems.
