M3eater

Cut to the chase; Are the steel control arms interchangeable with the aluminum arms in a stock usage? All my searching has detailed the differences in the lower control arm ball joints and most discussions center on what arms are needed for use with various lift kits. These discussions imply that you can swap arms to get the ones needed to work with the lift kits. However, I have a different desire. I need to replace the control arms as the bushings are soft (age) and allow wheel oscillations. The 22" wheels (and the 305 tires) I have installed are pretty heavy and really make the worn bushings apparent. If it's a direct swap, I'd like to install the aluminum lower arms in place of the current steel ones, to reduce the unsprung weight. Can anyone verify that the aluminum arms will directly install in place of the steel ones with no other changes? Thanks

'07 Escalade ESV, 160k miles, all stock, 265/65/18 Towing 24' Express cruiser, about 7500lbs Photo - Purchased truck 3-days before 2500 mile road trip to pick-up (just purchased) boat. Found that the rear shock air boots were blown ... no leveling (plus a few hundred pounds in the back). Highway only : Below 70mph = 10.5 to 11 mpg Above 70mph = 9.5 to 10 mpg Tucking in behind 40+ foot trailers = gain of about .5 mpg Our last two 3/4 ton Sunburbans, both 2001s (had 28' Express Cruisers at that time, 10k+ lbs), one with 6.0 and other with 8.1, both got just below 12-mpg on highway UNLOADED. Got 10-mpg average daily use .... if not hot-rodding around. Never calculated towing MPG.