Just MHO,
I was in your spot 2 years ago. Looking to replace my TV, 2001 Tahoe, 5.3 w/ 3.72. Towed fine on the flat, but slowed a lot on long hills. I am in NorCal too, Bay Area. Cuesta grade on 101, Tehacapi on 58 and others. The 4 speed tranny was geared to really wind up when dropping into...