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    LZ0 Diesel Mileage

    Now that the weather is warming up a little (still 32F this morning), I'm seeing more consistent 30+ mpg per trip. I did switch tires last October and saw my mpg drop a little. Went from the Bridgestone Alenzas that came with the truck to Cooper Discoverer + Trail AT. They look great on the...
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    Hi Just got my new 2025 1500 3.0

    Welcome aboard!
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    Hello, New Denali Ultimate Owner

    Welcome aboard!
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    New to GMC

    Sounds like the previous owner kept it well maintained. The only major upcoming maintenance will be the recommended replacement interval for the belt that drives the oil pump in the LM2 at 150,000 miles. The belt is located at the back of the engine which will require the transmission to be...
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    Major Issues with motor need some advice

    As mentioned in another forum, you've lost whatever remaining warranty you had by working on it yourself. I would have found another dealer to handle it. Good luck.
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    Who uses a fuel additive?

    VIdeo on diesel fuel additives which I found interesting.
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    New to me

    Welcome! I take the one off posters that seem to come on forums just to write long convoluted sob stories about how bad their new trucks are with a grain of salt. They are just usually just one or even a few posts and they're gone. I'm sure there are a few that have issues, but I don't believe...
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    2021 engine light and overheating

    If you can smell antifreeze, you have a leak somewhere. It may be small and probably evaporates when it comes into contact with a hot engine part. Have had this happen to me on previous trucks. One was where it leaking from a valve cover bolt hole of all places. Defect in the engine which...
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    Some 2024 GMC Sierra 1500 Units Need A Steering Gear Fix

    Also affects Chevy trucks. Service Update number N242478260.
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    Hesitation,then surge

    Which motor are they putting in? LM2 or LZO?
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    LZ0 Diesel Mileage

    I use the meters on truck to give me a general sense of how efficient I'm driving. I hand calculate every tank when I fill up. I have the Elevation trim, Crew Cab with standard 6' 7" bed. 3.23 gear ratio, tires are 275/60R20.
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    Which MPG do you go off of?

    They are close but I would expect it to be different since driving conditions can change throughout the month. It will depend on how much driving you do. Around home, I only fill up about twice a month. On road-trips, it'll be more of course. Weather can have a big impact also. I'm noticing...
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    Which MPG do you go off of?

    I have two trip meters. One I reset every month. The other is reset when I fill up. I hand calculate and found it's fairly accurate compared to the trip meters. I also reset my 50 mile meters every fill up.
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    Bumpy ride at 65 mph+

    Which tire did you switch to?
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    Bumpy ride at 65 mph+

    My Sierra 1500 with LZO came with Bridgestone tires. I noticed at freeway speeds, a more bumpy or slight vibration. I increased the tire pressure from 35lbs to 39lbs which seemed to help a little. I'm not totally sure whether it's just the tires or the shocks or a combination of both. Any...
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    Fuel Mileage

    Best tank of fuel mpg was 33.6 during a road trip to Spokane.
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    LZ0 Diesel Mileage

    The only true way to calculate accurate MPG is miles driven divided by gallons used. The various dash readouts are good for providing a general sense of efficiency. I track my mpg on every tank religiously by using the Fuelly app to track trends and to also make notes of driving conditions I...
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    New to the site

    I have the same color! Congrats on the new ride!
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    Low RPM Shudder at 1k RPM 40 and 50 MPH

    Just did a road trip to Spokane and back and didn't notice any shudder or shaking at those speeds. I did notice it being a little bouncy at 70 mph. It's probably the tires. Goin to try and sort that out by rebalancing and maybe a little more air.
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    How many have the Max Towing Package?

    Late to the party. I don't have the max towing. Payload capacity is 1600 lb.
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