How many quarts do you use for an oil change on a 2004 trailblazer 6 cylinder What if the manuel does not say?
Easy way to find out. Park on level surface. Drain the oil and
replace the filter with a new one. Now add 4.5 quarts of the proper
oil, and start the engine. Let it run for 3 minutes, and shut off.
Let set for 30 minutes and check the level. Add oil until you reach
the full mark. You now know how much it holds. My 2002 holds 7
quarts Per the owners manual the straight 6 in the 04 holds 7