1/2 ton GMC

Joined
Apr 7, 2023
Messages
44
Have the 6.2 at4 and would not get it again if you travel a lot. No maintenance issues in 45k miles so far and love the truck. 17mpg is about my best highway on average. Towing and passing is great with or without a trailer, but I am always looking for the next gas station. I can always find diesel but sometimes struggle to find premium and if I do, some of those one off or smaller stations have supper old premium gas causing knocking issues. My main gripe has always been that the tank is far too small for the truck. If it was 30 ish gallons I would love everything about the 6.2.


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Ucsdryder

WKR
Joined
Jan 24, 2015
Messages
6,677
Have the 6.2 at4 and would not get it again if you travel a lot. No maintenance issues in 45k miles so far and love the truck. 17mpg is about my best highway on average. Towing and passing is great with or without a trailer, but I am always looking for the next gas station. I can always find diesel but sometimes struggle to find premium and if I do, some of those one off or smaller stations have supper old premium gas causing knocking issues. My main gripe has always been that the tank is far too small for the truck. If it was 30 ish gallons I would love everything about the 6.2.


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That’s another good point. The 3.0 diesel gets 650 or so on a tank of fuel!
 

JBHunt_3

Lil-Rokslider
Joined
Feb 7, 2017
Messages
262
I have a 2022 GMC 3.0 duramax and the advice I would give is get every warranty available, you will need it. I just rolled over 70k miles on mine and have had all kinds of problems.

Leaky radiator
Melted fuse box
Multiple thermostats needing replacement
Engine Cooling fan comes on full blast at start up (assume this is due to the bad thermostats)
Check engine light is constantly on

Now this is a work rig and it gets rode pretty hard but it seems like I have had a lot of problems in the 1.5 years I’ve had the truck.

I average about 22.5 overall and you can definitely average 25-26 on the freeway or more if you keep the speeds reasonable.


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sconnieVLP

Lil-Rokslider
Joined
Oct 11, 2022
Messages
288
Location
AL
Have the 6.2 at4 and would not get it again if you travel a lot. No maintenance issues in 45k miles so far and love the truck. 17mpg is about my best highway on average. Towing and passing is great with or without a trailer, but I am always looking for the next gas station. I can always find diesel but sometimes struggle to find premium and if I do, some of those one off or smaller stations have supper old premium gas causing knocking issues. My main gripe has always been that the tank is far too small for the truck. If it was 30 ish gallons I would love everything about the 6.2.


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That’s interesting that you’re getting 17 highway, I regularly get 23-24 (highway) with mine. Major difference is that mine is an X31 SLT instead of the AT4, so it doesn’t have the lift and has less aggressive tires.
 

LFC911

WKR
Joined
Jul 15, 2020
Messages
579
Location
Lenexa, KS
I have a '22 3.0 SLT and have had a few minor issues, covered under warranty. I had a 4" Ready Lift installed and 34" tires and sits slightly higher than a Trail Boss or AT4, for a lot less $$$$. I average around 22 mpg on the highway running 5-7 over and get about 500 miles out of a tank of fuel. I love it as a hunting rig and has been one of my favorite trucks.
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LFC911

WKR
Joined
Jul 15, 2020
Messages
579
Location
Lenexa, KS
No onw is concerned with his "short short" daily commutes and the diesel?
I have 42k on mine and live 2 miles from work...obviously with those kind of miles in 2 years we drive a lot of other places but I'm rolling the dice...probably should have bought the extended warranty but the drive train is covered up to 60k.
 

tdhanses

WKR
Joined
Sep 26, 2018
Messages
5,905
I have a 2022 GMC 3.0 duramax and the advice I would give is get every warranty available, you will need it. I just rolled over 70k miles on mine and have had all kinds of problems.

Leaky radiator
Melted fuse box
Multiple thermostats needing replacement
Engine Cooling fan comes on full blast at start up (assume this is due to the bad thermostats)
Check engine light is constantly on

Now this is a work rig and it gets rode pretty hard but it seems like I have had a lot of problems in the 1.5 years I’ve had the truck.

I average about 22.5 overall and you can definitely average 25-26 on the freeway or more if you keep the speeds reasonable.


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Guess I got lucky 55k and zero issues.
 

tdhanses

WKR
Joined
Sep 26, 2018
Messages
5,905
No onw is concerned with his "short short" daily commutes and the diesel?
Not on a modern 1/2 ton, they are made for this and the EGR actually have the coolant running through it so it gets to operating temps really fast even in the middle of winter.

Now with a 3/4 ton yes.
 

tdhanses

WKR
Joined
Sep 26, 2018
Messages
5,905
I have 42k on mine and live 2 miles from work...obviously with those kind of miles in 2 years we drive a lot of other places but I'm rolling the dice...probably should have bought the extended warranty but the drive train is covered up to 60k.
Powertrain is covered to 100k.
 

LFC911

WKR
Joined
Jul 15, 2020
Messages
579
Location
Lenexa, KS
Powertrain is covered to 100k.

"Covers the components below for repairs, including parts and labor, due to defects in materials and/or workmanship for the duration of the warranty. Typical powertrain warranties last for 5 years or 60,000 miles, whichever comes first, but other durations are available."
 

180ls1

WKR
Joined
Apr 19, 2020
Messages
1,166

"Covers the components below for repairs, including parts and labor, due to defects in materials and/or workmanship for the duration of the warranty. Typical powertrain warranties last for 5 years or 60,000 miles, whichever comes first, but other durations are available."

Yeah, diesel guys are quick to talk fuel economy but slow to mention repair costs. I have a Cummins myself. The fuel economy is fantastic but the cost difference of repairs like the fuel pump, injectors, emissions equipment and so on can wipe out those savings VERY quickly.
 

TVW

Lil-Rokslider
Joined
Dec 12, 2023
Messages
194
Location
Idaho
No onw is concerned with his "short short" daily commutes and the diesel?

I'm not an expert by any means but I personally would be concerned.

So many DEF horror stories out there...had a couple myself until I deleted it.

I'd have a hard time buying a diesel for a daily driver/around town/short trips rig unless I planned to get rid of it before the warranty was up.
 

Zak406

Lil-Rokslider
Joined
Aug 29, 2021
Messages
146
Could someone define "short trips"? My typical commute is 20ish miles or 25-30 minutes

I wouldn’t consider that short. Keep in mind I make the same trip in my 6.6 dmax but I am deleted


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tdhanses

WKR
Joined
Sep 26, 2018
Messages
5,905

"Covers the components below for repairs, including parts and labor, due to defects in materials and/or workmanship for the duration of the warranty. Typical powertrain warranties last for 5 years or 60,000 miles, whichever comes first, but other durations are available."
When I bought my 2021 3.0, all diesels came with a 5yr 100k powertrain and an 8yr 80k emissions warranty, then your standard 3yr 36k bumper to bumper.

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