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No you dont If they are refusing you service take it back 3 times or for the same complaint. Then call BBB Nd file lemon law.

LOL

You starting to see what am saying now. And I have been dealing with since the first update before fire recall

Its starting to become a big issue now that people are seeing for themselves now as well.

Service Manager told the AFM system is using more gas instead of less gas. So it comes down to the sensors now.

They had me take it to another Dealer to check it out. They reprogramed it again they said there is a problem with the Active Fuel Management System the manager has one and he said his MPG has went down as well and customer are starting to come in and complaining. But I looked my truck up by VIN there was program issue before it left factory. This will make the 3rd time for reprogram now be understand if they have any problems when reprograming it can damage the ECM.

Well guys I live in Arkansas and I got my truck in Sep 2013 and mpg was great til they did these updates and ive had several post about this issues for a while now. It doesnt get as cold south and reads have been the same no matter what fuel I use. But before I was over 16 mpg in the city and 24 mpg on hwy. I getting better in my 2012 silverado and driving hasnt changed.

Vibration is coming is not coming from the tire. I can tell you that. I test drove 4 trucks on lot and they all had the same problem. I think its either in linkage or steer housing.

Its more then just Temp playing in on this. It will to a degree. Atoms slow down when its cold so it doesn't cause fraction and so you don't have much fumes. So when you have warm temp above 30 degrees atoms move faster and get more fraction and expanded faster. So if in theory what if the truck having to use more gas to get fraction between cylinders. that might account for lower mpg. So it could throw your gauges off because its reading alcohol per volume. and not mile per tank.

Ive had 305/40R22 Flaken on both of Tahoe and the last Silverado and it didn't affect the gas mileage if anything it was better the EPA. I think the longer they go the worse they get. 6.2 are do great from what my cousin showed me yesterday he getting above average. and he has 24' in tires and rims on his truck. So once again whats GM saying about this NOTHING.

Is that just on E85 or both fuels. GM keeping a long stick away from issue. More reports are complaints are coming into dealerships about the drop in in MPG. Might get worse as it warms up. 60 degrees here yesterday and both meters are dropping to down in 14 mpg.

1 12663390 Main Operating System for Product Safety Recall 14008. 2 12659528 New calibration with diagnostic enhancements for DTC P0128. 3 12642488 Fuel System 4 12642600 Speedometer 5 12660170 New calibraton to address abrupt deceleration after an aborted shift. 6 12659743 New calibraton to address abrupt deceleration after an aborted shift and improve active fuel management operation. 7 12625016 Slave Operating System 8 12642481 Engine

Just funny how GM hasn't said anything on this matter yet. I looked my truck up there was a problem with AFM before it left factory. website TIS2WEB input VIN# and show all the recalls and update before and after it was. built.

If you've had the "fire Update" GM fattened the mixture, hence the black smoke. Others have reported a significant loss in MPG. I have also, but I would say it's a combination of extreme cold temperature, my new exhaust and a lead foot and the new calibration This a member that lives up north and I seen more. GM trying to stay with originally spec for fuel setting on this engine but when u reprogram it that goes out the window.And I agree 50% might not have problems and thats why GM calls it a win. But there is a problem when truck starts off great and goes bad come on now. We all are customers and chevy die hearts but we deserve better.

Ill be a chevy guy no matter what. its been in the shop several times they even wanted this appointment but the service department said they would tell the same thing that AFM is the problem. Tell your dealer to call Bale Chevrolet in Little Rock talk to Paul Cook 501-221-9191 Service Department

Am in Arkansas and am been having problems with mine I have a lawyer on the case now, Dealer said customers are coming complain about a lot. But it is something to do with AFM system using more gas then less since update.

I don't trust that other Meter that's hook up to AFM system, Its way off and OnStar is to. I trip even the dealerships are back away from that bragging about fuel stuff. They going with 14mpg in city 20mpg hwy. since update. I know everybody wants going with that meter but do a trip meter test and app test on your phone there is no way that math and 2 meters can be off that much. my car has winter gas in it and it still doing 19.9MPG all day. is this truck that sensitive. Its a truck not a toy.

You crazy as hell, Ill never buy a Ford. Ill stay with Chevy problems and all I just want it fixed. It was just fine when I first got it. Chevy to end man.

dealer called afm system was effected by updated and they said instead of using less Gas it's using more. And GM tech heads can't figure it out. Update did something to system.

Little more info

Top 2 are E85 3 one is unleaded bottom one are EPA standard that you see on the window.

All the test GM did on the Silverado an other trucks before release on the market. as you can see the results of the test. real world. here is the list trucks they by model. based California Emission test but it shouldn't matter because they have the toughest laws on this stuff

I almost agree with that statement but its doest get that cold here to much and ive had this problem since the first update which first week of Jan and weather here was pretty good. But I did find emission test from California that General Motors did on the truck and should after 4000 miles and 10 road test 2wd 5.3L 2014 Silverado 12.4mpg in the city on reg. And 17mpg on hwy. Am going upload the page later. And it shows the EPA at 16mpg in city 22mpg hwy but no testing info.

Something of interest: I record the gallons used, the odometer reading, and the trip computer’s mpg report. Given the vagaries of filling a gas tank to exactly the same level at each fill-up, some variability is understandable. Mark Allen, GM’s director of global energy, mass, and aerodynamics, says some inaccuracy is unavoidable. “The density of fuel varies. We have no way to measure it. Mobil might be different than Shell. Summer gas to winter gas could be a big difference.” And then there are vapor-recovery systems. With modern cars’ sealed fuel tanks, gasoline vapor accumulated in the tank is absorbed by a charcoal-filled canister. Periodically, this canister is purged by the engine. “If the weather is hot, you generate lots of purge,” says Allen. “This unmetered fuel isn’t counted by the trip computer.”