HACK BLOCK
Full Access Member
When I looked up for my 14 denali awd.. I got the monroe 40048 w Z55 Susp
and the ACdelco # was 580-434
Hope this helps.. This would be the correct OE replacement... And retain
the factory Z55 active handling. Which is what I'll do when it's time.
I did the rear shocks last summer with the correct ACdelco air ride shocks
the Monroe 40049 is for trucks with z55 and 22's. I don't know why having 22's would matter