Hey peeps, I have a 15 GMC sierra 1500, it has the max tow package, with a 5.3, 6l80e, and 3.73 gears. What kind of fuel mileage are people getting with the same set up. I have some buddies that have similar rides, both 15 GMC's one has 3.08 gears a 5.3 with a speed and the other is 6.2 and an 8 speed with 3.42 they both get over 24 mpg. Anyone out there getting 19-20 on the highway like mine?
Now that I am a bit older with a family, the days of extreme loud exhaust in sport cars / trucks has come to somewhat of an end. I have a 2016 GMC Sierra 1500 with the 5.3l. About a year ago I decided to try out the Magnaflow cat back 3" and had a horrible drone through pretty much the entire RPM range. I tried everything to calm the drone but nothing seemed to work. I tried a couple of Borla exhaust systems and still too loud of a drone. I wanted to share a new cat back exhaust I just had installed that I am more than pleased with. The exhaust is handcrafted by MRT Performance in Plymouth Michigan, near where I live. They use T304 piping and they spent a lot of time developing and perfecting a bad a$$ muffler with a drone rating of 1 out of a 10 scale. Meaning 1 is almost no drone. The exhaust tip comes welded on and nice exhaust clamps are included. A buddy recommended them to me after my numerous failed attempts of finding a low drone, performance exhaust. I wanted to share this because I have read other posts about guys wanting performance exhaust but without the loudness / extreme drone. I have to tell you that I am so impressed and so relieved the drone, that was giving me headaches, is now gone! The low nice sounding rumble is there that at cruising speeds, and going WOT gives me that ear to ear grin! Normally I would not post about products I buy, but I had to share this newest purchase. The nice thing is I can have normal conversations at all RPM levels. The cool thing is MRT posted two nice videos of interior and exterior sounds using their Silverado test vehicle. I purchased the MRT Deep & Mellow cat back. They do ship their systems too. I attached some photos of my truck with the completed system in place. The link to the website is https://www.shopmrt.com/Chevy-Silverado-Performance-Exhaust-s/2273.htm
Trying to decide between a corsa or borla exhaust for the Silverado 5.3 with the dual rear exit. Not many videos besides the one corsa video on YouTube.
Lets get a small thread going on towing MPG. Please show what you towed, rough weight,and maybe a small map of your route.
Please also add what you have
On a 268.7 mile trip to the lake, i was able to get 13.4MPG. 3/4 highway doing 60-68mph and 1/4 city.
Towed just fine for roughly 3500Lbs.
MOTOR: 5.3L DFM
I like the fact that my 6.2 has lots of power and actually does get good gas mileage. I can run 65/70 and easily get 23-25mpg. I’m about to upgrade tires and looking for recommendations. I know I’ll lose some mpg and possibly low end power, but I don’t want to turn my beast of a truck into a turd.
I currently have stock 275/55r20 (31.9x10.8) on stock “snowflake” rims with Bilstein 2” strut/shock upgrade.
3 tire sizes I’m interested in:
If I had my way, I’d throw a 305/55r20 on there but I know I’d kill my power. I know this because I have 295/55r18 on my Ford and I ended up doing a gear swap from .373 to .456 to bet my power back.
I’m in the real estate business. I buy and sell farm and recreational land so I put lots of hwy miles on this GMC yet still need a tire to get me in and out of places on the farm and pull a tractor when I need to. I have trucks to mudbogg in, looking for practicality here.
Really hoping to to hear from guys with 6.2s.
Thanks in advance.
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