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Showing results for tags 'ecoboost'.
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Hi Guys I'm new to the site and new to GM trucks as well, my previous truck was a 2013 F-150 XLT with the 3.5 Ecoboost and 3.55 gears it was rated to tow 9,800lbs. I Just purchased a new 2015 Sierra SLT 4x4 with the 5.3 and 3.42 gears rated to tow 9,100lbs. Both of those numbers are significantly higher then I will be typically pulling and I am sure the Sierra is up to the task as the main things I towed with my F-150 was a 17ft fiberglass boat in the summer (approx 2500lbs dry) and an 18ft deck-over trailer with 4 snowmobiles in the winter (approx 4,800lbs) in the winter. I have not had a chance to tow with my new Sierra yet as I am still breaking it in but I thought I would try and start an thread before I do looking to you guys for some insight and opinions and I will definitely let you know my experience on the towing differences between the two trucks once I have a chance to compare. What I noticed with my F-150 was its very strong torque curve which allowed it to pull my trailers very easily, the transmission in tow/haul was also very good about picking a gear on the highway (usually 5th) and being able to hold it without hunting or lugging the engine. The downside as I am sure many have heard/experienced is the ecoboost is horribly inefficient when towing especially in the cold weather, for example when towing my sleds in the winter it typically returned anywhere from 8-10 US MPG (29-23 L/100 KM). My main concerns regarding the Sierra is that I notice GM has obviously tuned the transmission for maximum fuel economy as it is always looking to shift to 6th asap! I was wondering if when towing do you guys find putting it in tow/haul is enough to keep it from lugging the engine or gear hunting or do you tow using the manual mode? Also anyone towing similar weight trailers who might be able to advise on what sort of fuel mileage I might be able to expect would be greatly appreciated, thanks in advance!