i buy a new chev silverado with a 5.3 every 2 years and most get over 16 -18 miles per gallon my 2017 gets 18-19 per gallon. but here`s the real kicker you pull a trailor and it goes down alot,with my 16 foot boat and trailer10-12 miles per gallon, pull my 14 ft. enclosed utility trailer pack with my elk equipment out west thru the mountains 4- 8 miles per gallon . i do always get the towing package too but if your going to pull alot of trailors with a 5.3 beware gas mileage is poor then. i always drive 70 miles per hour when legal but a 5.3 is a dang tuff engine and so is a Chevrolet truck.
Business partner replaced his 5.3 Surburban engine at 200K miles. Cost his $7K. He said that was better than $85K for a new one.
DF
Look into the cost of crate 5.3 engines.
If he paid $7k, he either upgraded from a stock setup, or he got ripped.
Maybe he went to a Chevy dealer and told them to have at it.
