My grandfather has an 01 Suburban with the 5.3, it's miserable for towing. It's got little torque down low, everything happens above 3500 RPM. It's always having to shift gears to get anyplace under load. And the brakes are terrible.

-J

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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.