2024 Z71 mpg .. can it be this bad?

[carsenault300]

We just bought a new 2024 Z71 last weekend, and boy does the mpg really suck compared to the 2022 RST we traded in.

Anybody else experiencing similar results? I’m barely getting 12-13 in the city, and I can watch the average drop while sitting in the car with it running for just 10-15 minutes.

Both old and new have the 5.3L

 

[JayceeP]

Maybe engine break in period?

 

[Doubeleive]

We just bought a new 2024 Z71 last weekend, and boy does the mpg really suck compared to the 2022 RST we traded in.

Anybody else experiencing similar results? I’m barely getting 12-13 in the city, and I can watch the average drop while sitting in the car with it running for just 10-15 minutes.

Both old and new have the 5.3L

like I tell everyone, it all depends on how much you push the big pedal

 

[carsenault300]

One week in, not driving it any different than the previous model.

We were able to get 20-22 on highway trips and averaged ~17 around town.

For now it’s just wait and see I guess.

 

[fondupot]

Winter blend fuel. New engine. Short trips. All these things kills fuel mileage.

 

[GMCChevy]

Sometimes there are mileage issues durung break in.
As far as the average dropping as you're watching it that's because you don't have enough mileage on it and idle registers at like 0 mpg because it's not moving. Reset the average while you're driving and see what it says then ignore it for a while and let it average out better.

 

[RST Dana]

Or drive a tank full and manually calculate it

 

[Joseph Garcia]

I'm sorry to read your post with the low mpg. You are barely doing better than my 07 with the 6.2 performance tuned at 10-12 mpg in the city.

 

[Blueinterceptor]

Is it in 4wd or awd? Try some better gas. Ethanol free if you can find it.

 

[JayceeP]

Makes me glad I got the diesel lol