Used 2008 GMC Sierra 2500HD Consumer Reviews | Edmunds
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2008 Gmc Sierra-2500hd - Consumer Reviews

2008 GMC Sierra 2500HD

Average Consumer Rating

27 Total Reviews

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My first 3/4 Ton Truck & Diesel
Performance
Comfort
Fuel Economy
Fun To Drive
Interior Design
Exterior Design
Build Quality
Reliability
By Ryan
on

Vehicle

2008 GMC Sierra 2500HD SLT 4dr Crew Cab 4WD LB (6.0L 8cyl 6A)


Review

I previously owned a 1999 Silverado 1500 4X4 Extended Cab Standard Bed and a 2007 Sierra 1500 4X4 Extended Cab Standard Bed I wanted to upgrade to something more powerful with more room. While I really don't need it for towing at this point, I can only imagine how great of a towing vehicle this will be. I am very impressed with the power of the Duramax diesel, as well as how quiet it is compared to the Ford Power Stroke and the Cummins in the Dodge. I test drove all 3 brands, and what won me over was the performance and power of the Duramax, as well as how much smoother the Allison Tranny shifted over the transmissions in the Dodge and Ford. The interior is the best of the 3.


Favorite Features

Allison Transmission Quiet Diesel Engine as compared to the other two practical and comfortable interior practical styling G-80 rear locking differential XM Radio


Suggested Improvements

GM needs to start putting lights back under the hood and in the glove box! GM could use a better quality plastic for the interior. It is ok as is, but could be much better. It should be noted that the 2007+ Duramax engines come with a particulate exhaust filter. You cannot remove this.


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A Decent Truck With a Poor Drivetrain
1 of 2 people found this review helpful
Performance
Comfort
Fuel Economy
Fun To Drive
Interior Design
Exterior Design
Build Quality
Reliability
By Kevin H
on

Vehicle

2008 GMC Sierra 2500HD SLT 4dr Extended Cab SB (6.0L 8cyl 6A)


Review

This is a decent truck, but NOT with the 6.0 and GM 6 speed. You HAVE to get the Duramax if you need a 3/4 ton truck. The gas motor with fly by wire throttle, and GM 6 speed, is a horrible combination. It is a death trap when trying to merge with traffic, especially in conditions when you are on and off the throttle. There is up to a 3-4 second lag where absolutely no throttle input is given to the engine, no matter how hard you press on the accelerator. I believe GM implemented this so their tranny wouldn't explode. The engine and tranny computer work together, and the tranny computer tells the engine computer to not give any throttle until the tranny is ready (it never is).


Favorite Features

Good styling, decent interior, great towing capacity (get the diesel unless you plan on having a fuel tanker follow you), and tie down rails in bed of truck.


Suggested Improvements

Fuel mileage is not good. 12mpg in town, and 15 on the highway (at best, towing nothing). Lose the fly by wire throttle, and junk GM 6 speed. Allison tranny should be standard.


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Needs Help
Performance
Comfort
Fuel Economy
Fun To Drive
Interior Design
Exterior Design
Build Quality
Reliability
By Totally unimpressed
on

Vehicle

2008 GMC Sierra 2500HD SLE2 4dr Crew Cab 4WD SB (6.0L 8cyl 6A)


Review

Before buying this truck I owned a F250 V10. This truck was supposed to have 50 more hp and comparable torque but its lack of power is remarkable. My mpg is ok until I hook something behind it then its 5mpg... I have had no less than 20 warranty claims in 1 year. It absolutly can not handle any hitch weight without bottoming out. The sheet metal used to form the body is so thin the smallest bump and you have a dent. I really had high hopes that GM had a great truck but after the trans went out @ 6500 miles and many many other issues I'll admit I was wrong.. This pickup is fine for pulling your boat or cruising around but if you want a HD pickup do not buy this one.


Favorite Features

Comfort is good, ride is good, and milage is acceptable


Suggested Improvements

Build a pickup worthy of the HD that doesn't need to be in the shop once a month


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Not a fan
Performance
Comfort
Fuel Economy
Fun To Drive
Interior Design
Exterior Design
Build Quality
Reliability
By notafan
on

Vehicle

2008 GMC Sierra 2500HD SLE1 4dr Extended Cab 4WD LB (6.0L 8cyl 6A)


Review

The fuel economy of this truck leaves a lot to be desired. My truck is GPS'd so I am only able to drive the speed limit without getting in trouble. The best I have ever got for fuel economy is 14.8 mpg (imperial gallons). The quality of the truck is less than desirable. In cold weather (less than -20c) the back doors will not latch completely without slamming them hard. I actually knocked the molding off the door trying to get it latched. When the doors are closed they squeak and rattle so bad you have to turn the radio up. I have had to install a second battery to get the truck to start after sitting for more than 3 days. The airbag computer already stopped working and needed replacing.


Favorite Features

The interior ergonomics is nice. I really like the self dimming mirrors. Seats are what is expected from GMC (very comfortable). Sounds good at the exhaust pipe.


Suggested Improvements

Fuel economy would be nice. Quality need to be built into this truck. How about a rear bumper that actually takes a hit and doesn't fold like a cheap lawn chair.


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15 months later, still a great truck
Performance
Comfort
Fuel Economy
Fun To Drive
Interior Design
Exterior Design
Build Quality
Reliability
By godblesstx
on

Vehicle

2008 GMC Sierra 2500HD SLE1 4dr Extended Cab 4WD SB (6.0L 8cyl 6A)


Review

This is definitely a Cowboy Cadillac. Performance wise, the gas V8 has all the power you'd need and tows my 7K # trailer with ease. The tranny shifts smooth but as another reviewer said, make sure you get the TCM flash for better kickdown response. The 2500HD 'pure pick up' interior on the SLE not only looks great, it's durable and functional as well. The front seats are great for long road trips. I'm getting about 12 mpg around town and up to 17.5 mpg highway at speeds up to 65. Above that, it nosedives into the 12-14 range. Overall, I'm completely happy with my truck after 15 months. I've had no problems and plan to keep this for a long time.


Favorite Features

Interior comfort. V8 power and nice exhaust sound. Build quality inside and out. Looks great. Tons of storage room in cab. Can tow just about anything with ease. Smooth transmission. Great value!


Suggested Improvements

Seat fabric attracts lint and dirt. A more HD-type fabric would be preferred.


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