On the 2007 Chevy Colorado with a 5-cylinder engine, the oil pressure switch (or sending unit) is located on the engine block, specifically on the driver's side, near the back of the engine. It's typically positioned above the oil filter. To access it, you may need to remove some components for better visibility and reach.
on the engine
5 quarts
5w30
10w30 weight oil.
Factory said to use 5W30 weight only. Gastroll GTX and Kendell oils are a REAL good brand. Any HEAVER oil weight will burn the VALVETRAIN up.
5W30 oil.
On the Oil Pan.
Inside the oil pan mounted on the engine block.
The Chevy Colorado was first introduced in 2004 and gets up to 18 mpg in the city. The type of oil the manufacturer recommends is an ACDelco dexos1 Synthetic Blend.
That is 80 weight.
5.7 qts. with filter change