I have never owned a Toyota so I can't speak about them but our family has been GM for over 5 generations and so far we have never had a bad one.
Until just a few years ago we averaged over 100,000 miles a year pulling livestock trailers.
I have probably loaded a GM truck heavier than most.
I used to pull a 54' drop deck flatbed that weighed 9700 lbs empty to NC and load it with 24000 lbs of plywood and did it for several years with a 1 ton dually with a stock 454 and a 4 speed transmission.
I have never blown a motor, replaced a clutch or a trans the whole time I did this.
With the weight of the truck with three gas tanks holding over 150 gallons of gas and the weight of the trailer & load I was grossing just a tad over 41000 lbs and could run about any speed you wanted.
My drivers license back then can attest to that.
Try that with some of the other brands.
We did with 2 different Fords which lasted less than 40000 miles before the trans and clutch let go in 1 and the rear let go in the other.
Wouldn't have a Dodge.
I also tried an INTERNATIONAL.
Was a piece of junk from day on.
Sorry but I love my Chevys!!!
LONGTOM