blckthree

Was this from a standing start or was this 25 miles with the gauge reset while you were already rolling along at 75 mph? There are lots of games you can play to make the gauge look good, but is that your real fuel economy? My 5.3, 3.42 gear, 4x4 with 20" factory wheels gets on average 20.5 if I stay on the highway and at around 65mph. 70-80mph and it is lucky to see 19.2. My truck has 20,000 miles on it now, so it is fully broken in too. Mike

Just finished a 3100 mile road trip, driving was either 80mph interstate or stop and go traffic, or mountainous terrain in the Smoky Mountains. Had an average of 19.1 mpg for the whole trip. I'm satisfied! Mike

Do you think some of your shaking issues could be related to the lift kit on your truck? And do you really think comparing it to an Escape is a fair comparison? Mike

Your fuel mileage will be lousy with E85, the savings there comes from the greatly reduced cost at the pump. Mike

Here you go.. I love the color. Looks good and doesn't show the dirt and dust too bad. Mike

I've experienced the flat spotted tires in the cold if it has sat for a day or two, but that goes away after 2 or 3 miles as soon as some heat gets back in the tires. Mike

Disc brakes on all four wheels for 2014. Mike

That 20mpg figure included 400 miles with a 24-30mph tailwind which was getting me about 22.5mpg. I thought it would be less than 20mpg. Mike

At one time they thought the fix was to put on Continental tires instead of the Goodyears. Mike

My lifetime average from the Onstar app is 20mpg for 5500 miles. More in town driving here lately and the average is down near 17.5 lately. Mike

If it is an issue with the frame, that could relate back to harmonics. It could be a bad run of steel, poor heat treat processes, poor assembly processes, or any number of things. I would think if it was a frame causing problems, it would be a non repairable problem though and a potentially random problem. If it was a material problem, you would think it would be sequential serial numbers produced at the same time from that same lot of steel. Mike

If you are expecting an honest answer from your GM dealer, you better be really good friends with him. If like most sales people, their job is to sell a truck, they have no idea of problems related to the truck after it's purchase. If this problem isn't widespread, it is possible for a service department not to be familiar with it. Mike

Same problems when they get snow or ice covered. Once they clear or thaw out they work fine again. Mike

Interesting... from the page mentioned above. The belt-driven electric power steering system features an integrated electromechanical power steering unit, containing the power steering control module, its sensors, the power steering motor, a belt drive and a ball nut mechanism. The power steering control module is part of the power steering assist motor assembly and is replaceable as a complete unit independent of the steering gear assembly. The torque sensor is integrated with the steering gear pinion and is serviced as part of the steering gear. The power steering control module has a software feature referred to as Smooth Road Shake Compensation that reduces steering wheel vibration caused by an imbalance from the front tire/wheel assemblies. The vibration transmitted to the steering wheel is referred to as Smooth Road Shake and is a phenomenon that occurs only at highway speeds and on smooth roads. The power steering control module employs active controls to sense and reduce the periodic torque component applied to the steering wheel caused by the wheel imbalance force. This software feature will compensate for a specific range of imbalance. In addition to smooth road shake, road crown is compensated for by the steering wheel angle sensor signal, which calculates the intended driving direction. The Electronic Brake Control Module (EBCM) receives serial data message inputs from the steering wheel angle sensor. The steering wheel angle sensor does not require centering often. However, if the steering wheel angle sensor is not correctly centered it may create a lead/pull condition. If this condition is encountered, always perform the Steering Angle Sensor Centering procedure in SI before performing a wheel alignment.

Half of the road trip in the books yesterday. 735 miles, 75-80mph most of the way and a really strong tailwind and the average was about 22 with the tailwind, when I turned east and lost the tailwind it dropped down to about 19.2. 19.2 still isn't bad for 75-80mph. I was happy with it. Hoping for no wind on the return trip Monday to get a better idea of mileage. Mike

My 4x4 crew, 5.3 and 3.42 is averaging between 19.5 and 20.5. The 20.5 comes when I have 90% highway at about 65mph, with a few slow downs for traffic along the way. Too many city miles and it will drop to around 17 or so, that being about 30% city driving. 2100 miles on the clock right now, it will go for a 1500 mile road trip in a couple of weeks. I am expecting around 18mpg or so, that will be at mostly 75-80 mph speeds. Hoping for a tailwind in both directions! Mike

But what about the variation in the flow from the pump depending upon how full or empty the station's tanks are? Wouldn't that make a difference in when the pump shut off? I think you are reading too much into this!! Mike

On my third tank of gas, so far, 90% highway miles, I am averaging 20.6 on my daily commute to work and back. It will cross over to 1000 miles tomorrow. Very pleased with gas mileage and the truck. 3.42 gear, 4x4 Silverado LTZ. Mike