Fuel Economy Page

[palehorse]

That is exactly what I am saying. It is not supposed to do that though. Depending on the setting you have set for the fuel economy page (25, 50, 450 miles) is not supposed to change like that every time you start and drive the truck. If you have the fuel economy page set to 50 miles and then choose to have one of the sides of your dash to display the fuel economy it is supposed to show you the mpg for the last 50 miles and not reset with each drive of the vehicle.

The value on the right is supposed to change every time you drive, though. It's based on the distance you specified. It's a continuous running average and works exactly as I described above. As a continuous running average, it often matches your drive summary after just a few miles of driving. Yours is not broken. It's working exactly as it should.

The value on the left is the best ever 25, 50, or 450 mile value, and that one does NOT change unless a new higher value is reached for those distances.

Edit: for clarity.

 

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[usmcfiredog]

The value on the right is supposed to change every time you drive, though. It's not based on the distance you specified. Instead, it's a continuous running average and works exactly as I described above. As a continuous running average, it often matches your drive summary after just a few miles of driving. Yours is not broken. It's working exactly as it should.

The value on the left is the best ever 25, 50, or 450 mile value, and that one does NOT change unless a new higher value is reached for those distances.

It is. Next time you drive more than 25 miles go to the fuel economy page and change the distance and you will see the mpg change based on the distance you have selected on the fuel economy page. The fuel economy page and the right side change together and mirror each other. These are not supposed to change every time you take a drive. It is only supposed to go up and down based on your last 25, 50, or 450 miles.

That's the way it has been. Now could they have changed it with the 22 refresh I guess but this page has never done this before. There has been others on this thread that says theirs don't reset with every drive of the vehicle.

 

[Andystoy AT4]

On my 22 Refresh I have Trip 1 and 2 and current trip which is not the same as Trip 1 as it resets itself every time you stop and start the engine.
I have not reset Trip 2 since new so it shows me cumulative mpg or l/100 km since new.
I only reset Trip 1 when I fuel up so on the first leg Trip 1 and the current trip are almost identical until you shut off and restart. Trip 1 continues to accumulate miles and fuel until you reset it when fueling up, current trip resets to zero when you start the engine every time. FWIW

 

[usmcfiredog]

On my 22 Refresh I have Trip 1 and 2 and current trip which is not the same as Trip 1 as it resets itself every time you stop and start the engine.
I have not reset Trip 2 since new so it shows me cumulative mpg or l/100 km since new.
I only reset Trip 1 when I fuel up so on the first leg Trip 1 and the current trip are almost identical until you shut off and restart. Trip 1 continues to accumulate miles and fuel until you reset it when fueling up, current trip resets to zero when you start the engine every time. FWIW

I am not talking about the Trip 1 or Trip 2 page. Those are not reseting. There is a Fuel Economy Page that you can enable. That is the page that I am talking about. That's why I keep referencing the 25, 50, and 450 miles. It is not the trip pages that I am talking about. I reset those manually when I fillip or whatever else I want info for.

 

[Andystoy AT4]

The page that resets itself every time you start or stop the engine is called "drive summary" on my DIC and it shows kilometers starting at zero, avg fuel in l/100 km (liters per 60 miles) and time. The truck is in Canada and uses the metric units. In my previous post I referred to the drive summary page as the current trip page and it is enabled automatically.
Your US units display may be a bit different.

 

[usmcfiredog]

The page that resets itself every time you start or stop the engine is called "drive summary" on my DIC and it shows kilometers starting at zero, avg fuel in l/100 km (liters per 60 miles) and time. The truck is in Canada and uses the metric units. In my previous post I referred to the drive summary page as the current trip page and it is enabled automatically.
Your US units display may be a bit different.

I am not talking about the drive summary page. I am talking about the fuel economy page. If you go into your dic options where you turn different pages on and off there is a “fuel economy” page. That is the page that I am talking about that resets. This is where you can see your best and current average for 25 miles or 50 miles or 450 miles. The best average does not reset and the average is supposed to be the current mpg for 25 50 or 450 miles and should not be starting over every time you drive the truck. The drive summary page is supposed to restart every time you drive. The drive summary avg should not necessarily match the fuel economy page for every single drive

 

[Teegunn]

I am not talking about the drive summary page. I am talking about the fuel economy page. If you go into your dic options where you turn different pages on and off there is a “fuel economy” page. That is the page that I am talking about that resets. This is where you can see your best and current average for 25 miles or 50 miles or 450 miles. The best average does not reset and the average is supposed to be the current mpg for 25 50 or 450 miles and should not be starting over every time you drive the truck. The drive summary page is supposed to restart every time you drive. The drive summary avg should not necessarily match the fuel economy page for every single drive

I understand what you are saying, and you are correct - the right side of the 25/50/450 page is not supposed to reset at every start/stop. There is something wrong with your electronics, or more likely with the software running the electronics.

It would make me unhappy if I had what you have going on. I mean, it is not the end of the world, but for a truck that MSRP's over 70K (over 80K in some trims), this kind of stuff shouldn't be happening, or there should be a fix available if something like this is happening. But saying that and getting it fixed are two different things. A dealership's shop SHOULD be able to figure it out and fix it, but heck, they could never figure out the "service emissions system" error code on my 2020 AT4 after having the truck for 4 weeks, so finding a fix/cure for issues on these computer controlled trucks is a complicated thing, and often a guessing game.

I hope it gets figured out for you sooner than later.

 

[palehorse]

I am not talking about the drive summary page. I am talking about the fuel economy page. If you go into your dic options where you turn different pages on and off there is a “fuel economy” page. That is the page that I am talking about that resets. This is where you can see your best and current average for 25 miles or 50 miles or 450 miles. The best average does not reset and the average is supposed to be the current mpg for 25 50 or 450 miles and should not be starting over every time you drive the truck. The drive summary page is supposed to restart every time you drive. The drive summary avg should not necessarily match the fuel economy page for every single drive

The value on the right is the continuous running average for the distance you selected. It doesn't "start over" every time you drive the truck. Instead, it's based on whatever distance you selected for the left side value, and begins to change based on your current real-time mpg. It should always start with where it was when you last turned off the truck. It will usually drop when you begin to drive, then slowly creep back up to closely match the Drive Summary mpg value (if you go enough miles for that to happen). It's the CURRENT average for your last 25, 50, or 450 miles - to include miles from your previous trip(s) in that distance.

For example: You drove 27 miles on Monday and 34 miles on Tuesday. If you have that page set to 50 miles, the average displayed on the right will be the mpg for the last 50 miles of the 61 total miles you've driven this week - even though the miles were on two different days. When you get in the truck on Wednesday, the value on the right will initially be whatever it was when you turned off the truck on Tuesday, and then it will adjust from there in real time. Think of it as a "rolling continuous average of the last 50 miles, regardless of how many times I turned off the truck in those 50 miles."

Is yours showing zero on the right every time you get in the truck? If so, that is wrong. If it's simply changing as you drive, then it's working as intended.

 

[usmcfiredog]

The value on the right is the continuous running average for the distance you selected. It doesn't "start over" every time you drive the truck. Instead, it's based on whatever distance you selected for the left side value, and begins to change based on your current real-time mpg. It should always start with where it was when you last turned off the truck. It will usually drop when you begin to drive, then slowly creep back up to closely match the Drive Summary mpg value (if you go enough miles for that to happen). It's the CURRENT average for your last 25, 50, or 450 miles - to include miles from your previous trip(s) in that distance.

For example: You drove 27 miles on Monday and 34 miles on Tuesday. If you have that page set to 50 miles, the average displayed on the right will be the mpg for the last 50 miles of the 61 total miles you've driven this week - even though the miles were on two different days. When you get in the truck on Wednesday, the value on the right will initially be whatever it was when you turned off the truck on Tuesday, and then it will adjust from there in real time. Think of it as a "rolling continuous average of the last 50 miles, regardless of how many times I turned off the truck in those 50 miles."

Is yours showing zero on the right every time you get in the truck? If so, that is wrong. If it's simply changing as you drive, then it's working as intended.

So what happens with mine is say I drive 30 miles and have my preference set to 25. I park and it says say 17 MPG and the drive summary says like 16 and I shut off the truck and go do something. I get back in I start the truck and it still says 17, and the drive summary of course is --. I start to drive and then it falls to like 6 or so by the time I reach .1 miles or so and starts to creep back up and matches the drive summary as the drive summary starts to get an average as I start to drive. This happens no matter if I have 25 or 50 or 450 miles selected on the fuel economy page. The best average does change based on the highest average based on the current drive even if I drive less than the miles selected.

Based on previous trucks that I have owned all GM. On the fuel economy page the average on the right does change but never goes from like 17 down to 6 and then slowly creep back based on the current drive. The average goes up or down by small increments like .1 up or down all based on the previous XX miles I have driven. So if I got in the truck and it was 18.1 and I drive like a mile it may be 18.0 or 18.2. In this truck I get in and it says like 16 and I drive a mile and it says like 10 or so.

I have an appointment with the dealer to see if they are going to be willing to reflash my instrument cluster.

 

[usmcfiredog]

I understand what you are saying, and you are correct - the right side of the 25/50/450 page is not supposed to reset at every start/stop. There is something wrong with your electronics, or more likely with the software running the electronics.

It would make me unhappy if I had what you have going on. I mean, it is not the end of the world, but for a truck that MSRP's over 70K (over 80K in some trims), this kind of stuff shouldn't be happening, or there should be a fix available if something like this is happening. But saying that and getting it fixed are two different things. A dealership's shop SHOULD be able to figure it out and fix it, but heck, they could never figure out the "service emissions system" error code on my 2020 AT4 after having the truck for 4 weeks, so finding a fix/cure for issues on these computer controlled trucks is a complicated thing, and often a guessing game.

I hope it gets figured out for you sooner than later.

I have an appointment on the 20th for them to hopefully reflash my instrument cluster. I hope that fixes it and yes I am not happy that this is happening to a brand new 80K truck.

 

[raysmuffler]

Drove a 25-30 mile trip and had my avg MPG up to 20-21mpg. Started the truck next morning to go to work and backed out of the garage then sat in my driveway for about a minute or two with the truck running. The AVG. mpg steadily dropped all the way down to 0.4mpg. It took 5-10 miles of easy driving to get it to come back up to where it was the day before. (20-21mpg). My 2019 Denali did not do this.

 

[usmcfiredog]

View attachment 2837
Drove a 25-30 mile trip and had my avg MPG up to 20-21mpg. Started the truck next morning to go to work and backed out of the garage then sat in my driveway for about a minute or two with the truck running. The AVG. mpg steadily dropped all the way down to 0.4mpg. It 5-10 miles of easy driving to get it to come back up to where it was the day before. (20-21mpg). My 2019 Denali did not do this.

That is what I am talking about. My 22 Silverado Limited (Pre-Refresh) didn't do this either. Hopefully they can reload the software and get it to work they proper way. Others have said that theirs don't do this.

 

[usmcfiredog]

So went to the dealer today. After trying to explain to them the issue for like 45 minutes, they said they sent a request to the tac line and they will get back to me later. The service manager even printed out something that explains what each page in the DIC and tried to claim that the issue I was having is normal because of what he was reading under the Driver Summary page even though I kept showing him that it is the fuel economy page is what I am having trouble with. They said they have to get a file or something from the TAC line before they can reflash the BCM or the cluster, because the tool that they have will not let them re-install the same version of software, even though they never checked.

I think I need a new dealership. It was such a pain trying to explain to them the issue that I was having.

 

[Teegunn]

So went to the dealer today. After trying to explain to them the issue for like 45 minutes, they said they sent a request to the tac line and they will get back to me later. The service manager even printed out something that explains what each page in the DIC and tried to claim that the issue I was having is normal because of what he was reading under the Driver Summary page even though I kept showing him that it is the fuel economy page is what I am having trouble with. They said they have to get a file or something from the TAC line before they can reflash the BCM or the cluster, because the tool that they have will not let them re-install the same version of software, even though they never checked.

I think I need a new dealership. It was such a pain trying to explain to them the issue that I was having.

Sounds like they are just making excuses to blow you off and hope you tire of trying to have it working properly. Kind of like how most corps work these days - make it very hard for a customer to actually get anything fixed/repaired, warranty issues/claims they try to deny or make it tough for the customer to actually have valid warranty issues covered.

Basically the same way insurance companies make it complicated, difficult and tough to (usually) make a claim and have it accepted. Insurance companies, like car manufacturers, are in business to make money, and they try their darndest to limit the amount they ultimately have to pay out. With insurance companies, like on a vehicle (not talking about health insurance but that is a racket also too often), if you DO have a valid claim that they then have to cover, no worries, they will just jack your rates up and make it back on the back end.

I know some dealerships are better than others, but it is seeming that there may not be many really good ones left. An 80K truck but hey, it's just "user error" as an excuse on why your truck is doing what it is doing. Makes me pissed off, and it isn't even my truck with the issue going on. End rant....

 

[usmcfiredog]

oh I was so pissed when I left. plus I had warranty for paint chips and stuff and all they did was fill in with a little paint to prevent rust. I was so done when I left