Tahoe Hybrid questions

My wife wants a Tahoe and we are probably going to go look at a 2009 hybrid that’s for sale.

I think the only things that are different from a regular Tahoe is the battery pack and the transmission to accommodate the electric motors (correct me if I’m wrong).

Pros: comes with 6.0 V8, only sold in LTZ trim, better fuel economy

Cons: heavier, battery replacement is expensive, more to go wrong

I’m not opposed a hybrid, and so far evidence points to the batteries lasting pretty much the life of the vehicle and electric motors are generally very reliable.

Any opponauts have experience with these vehicles? Any input would be appreciated.