6l90 holds how many quarts - 2008 Chevrolet Silverado 3500HD 2WD

https://www.google.com/search?q=2007+Chevy+Silverado+2500+HD.+TCM+location

Diagrams and videos in the link

Which transmission ?

Automatic Transmission - 5L40-E/5L50-E
Automatic Transmission - 6L50/6L80/6L90

Whats a quart please ,i would imagine that this engine holds about 4.5 litres with a oil filter.

It depends on the filter you buy the motor will hold 4 quarts some filters hold a 1/2 quart some hold a whole quart so 41/2-5 depending on filter

{: ) Engine Oil with Filter - All Engines 5.7 L (6.0 qt)
Transmission fluid:
4L60-E/4L65-E/4L70-E Pan Removal (4.7L), 4L80-E/4L85-E Pan Removal (7.3L),
6L50/6L80/6L90 Pan Removal (5.7L)

A typical automobile holds 4-5 quarts of oil.....Depends on the size of motor. If changing yourself, Drain out all oil, change filter, put oil plug back in. Put 3- 31/2 quarts back into car. put oil cap on and start car. Let run for 2-3 minutes then shut back off. Wait for a few. Pull out dipstick wipe, put back in then pull out a second time...Now you know how much you need to top off level.

4.3 ENGINE HOLDS 4.5 QUARTS WITH NEW OIL FILTER 4.8 - 5.3 -6.0 -ENGINES HOLDS 6.0 QUARTS WITH NEW OIL FILTER. 6.6 DIESEL ENGINE HOLDS 10 QUARTS OF OIL WITH NEW OIL FILTER.

Most GM car engines hold only 4.5 quarts when changing oil and filter but your 96 Aurora 4.0L should hold 7 quarts or 6.6 litres as it's kind of a unique engine.

4.8 quarts

Yes. Cadillacs generally do hold 7 or more quarts.