Where is the oil sending unit on a 2005 Chevy Silverado? (video)
Where is the oil pressure sending unit on a 2003 Silverado? (video)
Should my RPM be at 1 when parked?
The idle speed should feel consistent without skipping or slipping. In most of today's cars, an idle speed of 600 to 1000 RPMs is average. If your car is idling rough, though, it won't feel smooth. The RPMs will jump up and down, for example, or they'll fall below 600 RPM (or whatever is typical for your vehicle). via
What causes a rough idle?
Causes of a rough idle. Many different problems could result in a rough idle for your car or truck, including: dirty fuel injectors, clogged air filters, bad spark plugs, and a variety of exhaust system issues. via
How do you reset the oil life on a 2004 Chevy Silverado? (video)