Used 2015 GMC Sierra 2500HD Consumer Reviews
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Great Diesel Truck
Tom, 12/23/2015
updated 12/28/2016
2015 GMC Sierra 2500HD SLT 4dr Double Cab 4WD LB (6.0L 8cyl 6A)
18 of 18 people found this review helpful
Bought this SLT model after trading in a 13 2500 HD Denali. Needed to pull a 16000 lb Fiver camper. This Pickup has extreme power and smooth shifting. Thought about getting a single rear tire toner till I realized the only difference was an extra leaf spring is all. I had automatic step sides that come down when you open the door and that made access in and out easy even the wife enjoys it. I have 13000 on it now. I guess I don't see any issue with the headlights seem the same although I did notice at the parts counter upgraded bulbs on the counter so maybe that fixed the issue. I especially like the bright lights in the side mirrors for backing up at night. No problems with the leather or accessories, I did get extended warranty just in case. mileage varies about 8 mph pulling the camper and 17 mpg on the highway not pulling town about 15. Seems like a great pickup more to come.
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Duramax
A. Simms, 09/25/2018
2015 GMC Sierra 2500HD Denali 4dr Crew Cab 4WD SB (6.0L 8cyl 6A)
11 of 11 people found this review helpful
This is a 6.6 Duramax crew. There was not an option when writing a review. I bought this truck used with 44k miles on it in February 2018 from a private party. This is the nicest vehicle I have ever owned. I have no issues with the headlights so they either were replaced or people are over reacting. This is my daily driver and I average 17mpg. 9 miles to work and mostly in town driving. I love towing with this truck!!! We have a 25’ Travel trailer and it’s like it’s not even back there. I love the exhaust brake and tow button. I am trying to think of something I don’t like about it but it’s hard. The interior is awesome and the seats are comfy. We have taken a handful of road trips already and can’t wait to take more. It has every option except the heated steering wheel. I even have the remote start which is awesome!! I added oversized tires and wrapped the grille and mirrors. I also put a spray liner on both front and back bumper. The rest is stock. This is a beautiful truck inside and out. I get tons of compliments. I will be keeping this for many years.
Duramax!
JD, 10/08/2015
2015 GMC Sierra 2500HD Denali 4dr Crew Cab 4WD SB (6.0L 8cyl 6A)
11 of 12 people found this review helpful
There is no drop-down option for the Duramax Diesel version. Traded in a 2014 Denali 1500 for the big boy. I love this truck. No car/truck is perfect but the Duramax is the best Diesel engine on the road IMO. Sometimes the radio is quirky when plugging in my iphone so I just stream over bluetooth. I've noticed that the power steering takes more arm strength when maneuvering tight spots, more-so than other truck brands. The headlights are a less than great and should be recalled. I am hoping the new headlights that come on the 2016s will be interchangeable. I love my truck. It turns a lot of heads.. especially mine!
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2015 Sierra HD diesel
Jon, 10/20/2015
2015 GMC Sierra 2500HD 4dr Double Cab 4WD SB (6.0L 8cyl 6A)
6 of 8 people found this review helpful
So, yes. The SD card reader is pretty much useless. But all of the storage is amazing. The 6.6 is amazing along with the Allison transmission. I'm getting 17 in town and 20-21 on highway. Towing my tractor around is a breeze almost forget it's behind me. I did read the other reviews and the gap at the tailgate is real, and it does let a lot of dust in, However you can buy a seal kit for it. The safety features are cool. With the vibrating seats, lane departure detection, and back up camera, if you crash and it's your fault. It is actually your fault. bottom line I've owned a lot of vehicles, other than a minivan which I haven't owned but have been in and was amazed at the comfort and room this is the best and most useful vehicle you can get.
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GM Quality
Brad, 09/10/2015
2015 GMC Sierra 2500HD SLE 4dr Crew Cab 4WD SB (6.0L 8cyl 6A)
10 of 21 people found this review helpful
only 1700 miles on the truck and had it in the dealer twice for an oil leak. The oil pan has surface cracking, apparently acceptable to GM as it is on every truck. The wax coating on the frame can be easily removed by a fingernail and already has rust coming through mainly on the joints as if it was not applied properly or the coating method is simply insufficient. I actually bought 2 of these trucks and both have had paint issues. the 1st truck had the 3.73 axle, which has a poor tow rating of only 9200 pounds or so. this information cannot be found on the website and the website shows you cant even get the 3.73 with the gas engine. sunglasses holder is oddly shaped and won't fit regular sunglasses. the manual shift mode doesn't allow you to shift up when coasting downhill or something. the truck always seams to be down one gear lower than it should be when coasting and tow mode is off. the passenger tow mirror is very poor for visibility and doesn't show the side of my trailer as my f150 did. the led lighting is cool but there are wires that can get snagged under the bed rails. ride is more firm than previous models which I like. Ipod playback is horrible. very slow to respond and often doesn't work at all. dealer said it works fine. air conditioner lowers for phone calls which is cool. towing uphill isn't very good. the truck bounces between 2 gears, one which is excessively high and the other is to low to maintain speed.
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Poor Quality Truck
Randy Shuck, 05/18/2016
2015 GMC Sierra 2500HD 4dr Crew Cab SB (6.0L 8cyl 6A)
7 of 15 people found this review helpful
The day I brought the truck home I noticed that the heater would not change from defrost.Then after a couple of weeks water leaked on drivers side front and back.All carpet had to be replaced.Then water leaked on passenger side.The truck has 3100 miles on it and has been in the shop 16 days.Im wondering what will be next.Its obvious GM dosent build a quality truck any more.
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Looks great till you start looking
Frosty, 08/24/2015
updated 08/27/2018
2015 GMC Sierra 2500HD SLT 4dr Crew Cab 4WD SB (6.0L 8cyl 6A)
10 of 25 people found this review helpful
I was coming back to the GMC family after spending 10 years with a Toyota Tundra !!!! Well first the headlights at night a terrible you better test drive it at night ?? Second the gas mileage is almost ridiculous, the tailgate doesn't fit properly it has a gap on the sides and everything gets dusty as I have a custom ARE topper . The sunglasses holder has to be for reading glasses as nothing fits . The seat will be wore out in 10 years as the leather is of poor quality. The SD car reader slot doesn't allow you to read trail camera photos?? This vehicle was designed for a person that wants to drive a truck not a real outdoorsman that would enjoy the usefull features we need and would use . 8/22/18 now the water pump failed this is ridiculous for a 3 yr old vehicle so much for the radio you now can’t program the radio also the power mirrors work randomly ? The motor is probably going out .
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Can't drive at night,and WIFi jammed !!👎👎
Frosty, 11/29/2015
updated 05/31/2018
2015 GMC Sierra 2500HD SLT 4dr Crew Cab 4WD SB (6.0L 8cyl 6A)
10 of 27 people found this review helpful
Well folks I'm back we've been to the dealer 4 times the headlights are terrible . I asked the service manager to load his family up and take it for a spin as I hate to drive at night . The headlights are only producing 1250 lumens when they should be 2500 to allow for proper visual at night . Please give this vehicle a drive at night and try to turn onto a side road make sure you have the salesman in the passenger seat !!!!.The WiFi is always blocking your ability to use your smart phone as Gm is trying to sell WiFi packages should be illegal to jam your own vehicle ability to have a smart phone in the vehicle
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2015 GMC Sierra 2500HD SLT 6.0l V8
Eric, 02/21/2019
2015 GMC Sierra 2500HD SLT 4dr Double Cab SB (6.0L 8cyl 6A)
2 of 4 people found this review helpful
Bought the truck in June of 2015 (used) after a very short ownership by the previous owner and since put on only around 25k miles. Never had any problems. Fuel milage is obviously not that great but even all things considered it could definitely be a bit better than it is (getting around 15hwy-10city) with regular gas. The cabin; even at highway speed is very quiet and reasonably comfortable. Ride quality isn't that great but then again what do you expect out of a HD chassis so i usually look past that. I've only ever used the truck for towing once, and it was a decently heavy load (trailer and an ltd country squire station wagon) and it did half decent the entire 150 mile or so trip...although it did struggle a little going up some steeper grades. Gas mileage went down quite a bit to around 9mpg average. All in all its a good truck and even 4 years later in 2019, its still holding its value good.
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Still a Happy Momma!!!
Donna , 06/04/2020
updated 12/08/2022
2015 GMC Sierra 2500HD SLT 4dr Crew Cab 4WD LB (6.0L 8cyl 6A)
1 of 2 people found this review helpful
This truck had what I needed !!! I Love My Truck !!!
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