I pulled this trailer with a 1996 s10 ZR2 with the 4.3 liter.
https://coachmenrv.com/travel-trailers/viking-ultra-lite/21FQ/3004It wasnt winning any races but did well.
That had a 5500 lb tow rating.
The thing with the 4.3 is it made all its torque at 2800 rpm.. So on the highway in 3rd I was in the power band at 65 MPH.
The new colorados are way better.
Thats what I am going back too eventually.
Ill be getting me a colorado and going back to a 7.6" trailer. Tandem axle.
I dont like slides and that camper was perfect for us.