Assume (always dangerous) that your Highlander is first generation.
Meaning it is derived from the Camry...so think of towing with that,
a Camry
Second gen Highlander is derived from the Odyssey
Stuff like the MTWR (Max Tow Weight Rating), etc are derived from the
'curb' vehicle. So if yours has an automatic, AC, etc...those ratings
do not apply and are lesser by the weight of the stuff over and above
the "curb" vehicle
Oh...no tow option...then even less rating until you add the main
component if you have an automatic...an external automatic tranny cooler
I never say sure or no, just provide you the OP with metrics to figure
it out yourself...as there is only one person responsible for the
setup...that is the driver
-Ben
Picture of my rig1996 GMC SLT Suburban 3/4 ton K3500/7.4L/4:1/+150Kmiles orig owner...
1980 Chevy Silverado C10/long bed/"BUILT" 5.7L/3:73/1 ton helper springs/+329Kmiles, bought it from dad...
1998 Mazda B2500 (1/2 ton) pickup, 2nd owner...
Praise Dyno Brake equiped and all have "nose bleed" braking!
Previous trucks/offroaders: 40's Jeep restored in mid 60's / 69 DuneBuggy (approx +1K lb: VW pan/200hpCorvair: eng, cam, dual carb'w velocity stacks'n 18" runners, 4spd transaxle) made myself from ground up / 1970 Toyota FJ40 / 1973 K5 Blazer (2dr Tahoe, 1 ton axles front/rear, +255K miles when sold it)...
Sold the boat (looking for another): Trophy with twin 150's...
51 cylinders in household, what's yours?...