Used 2008 GMC Sierra 2500HD Crew Cab Consumer Reviews
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2008 GMC 2500 Diesel
John, 08/03/2010
2008 GMC Sierra 2500HD SLT 4dr Crew Cab 4WD LB (6.0L 8cyl 6A)
42 of 46 people found this review helpful
I bought this truck from a local used car dealer. I drive this truck mostly through the mountains of southwestern PA hauling my travel trailer. I previously owned a 2005 F250 diesel. There is absolutely no comparison between the two trucks. This GMC outperforms the ford in every way possible. I never thought I would say this considering my grandfather, my father, and I have been ford guys our entire lives but the proof is in the way the truck drives, handles, pulls, and the reliability I have experienced with this truck. I have driven this truck for more than 15,000 miles and overall I am completely satisfied. I have to say that this is by far the best truck I ever owned.
Back to re-review after 6 months
SLC, 12/02/2008
2008 GMC Sierra 2500HD SLT 4dr Crew Cab 4WD SB (6.0L 8cyl 6A)
5 of 5 people found this review helpful
I wrote my first review in June after trading in a 2004 F-150. It has only got better and better. Absolutely no issues. Fuel mileage has gone to over 23 MPG on a recent hiway only trip of 600 miles, to between 15-18 MPG back and forth to work and weekend trips. I have not had this kind of acceleration since my '61 Vette'. There are no rattles or any fit/finish problems. Only oil changes and tire rotation. I would not trade this truck for any other on the market. I did extensive reseach and I am so glad I choose this HD2500, Duramax/Allison. I would recommend this truck to anyone, no hesitation.
2nd Diesel, I'm keeping this one
Justin, 12/19/2008
2008 GMC Sierra 2500HD SLE2 4dr Crew Cab 4WD LB (6.0L 8cyl 6A)
4 of 4 people found this review helpful
This is the 6.6L with the Duramax/Allison combination, not the 6.0L. I previously had an 05' with similar features but wasn't worth the buyout at the end of the lease. There are things I liked about the 05 that the 08 lacks but most of all, I'm very pleased with the truck. Towing is great. Crewcab 8' bed is a long truck though. Park it at home if you intend to go into a city.
Transmission/ride
Craig, 06/19/2008
2008 GMC Sierra 2500HD SLT 4dr Crew Cab SB (6.0L 8cyl 6A)
2 of 2 people found this review helpful
This truck is by far the worst riding vehicle i have ever owned. I understand it is a HD, but come on GM, you're not always towing with it 100% of the time. I cannot believe the research and development guys at GM designed it that way. The rear end bounces 60% the time when empty or partially empty. tryed changing shocks and tire pressure adjustment. helped out about 5%. The new 6 speed tranmission in my truck needs work. There is a delay in shifting between 2nd and 3rd gear. This happen 10% to 20% of the time but is annoying.When the delay happens engine racing anywhere from 200 rpm to 1000 before the shift takes place.Tranmission engages harshly when shift happens. Look elsewhere.
Duramax/Allison combo is a beast!
Mark, 01/09/2008
2008 GMC Sierra 2500HD SLT 4dr Crew Cab 4WD SB (6.0L 8cyl 6A)
2 of 2 people found this review helpful
This vehicle was a replacement for a 2005 2500HD Duramax SLE and the engines are nothing alike. The new Duramax and six speed Allison is quieter, smoother and the towing power is incredible. We are towing a 35 foot travel trailer and it is like there's nothing behind you. The Z71 package does increase the stiffness but the ride is excellent. The interior rivals my '07 Denali. If you gotta tow, this is the one to buy.
Happy I switched to diesel
SLC, UT, 06/11/2008
2008 GMC Sierra 2500HD SLE1 4dr Crew Cab 4WD SB (6.0L 8cyl 6A)
3 of 4 people found this review helpful
I traded in a 2004 F150 4.6L with 25,000 miles to get a 2008 GMC 2500 6.6L diesel. The performance is unreal. I am getting over 13 mpg, which is the same as the 150 on Premium and I get 3 times the power. The ride, fit and finish are as good or better and the information center is a real boon. The shakedown will continue for another six months but for the first 30 days I could not be more pleased.
GMC Sierra 2500HD 4WD 6.6L
James Nichols, 05/12/2008
2008 GMC Sierra 2500HD SLT 4dr Crew Cab 4WD LB (6.0L 8cyl 6A)
2 of 4 people found this review helpful
First off, after researching diesel trucks for over a year, it was clear that the Duramax/Allison power train was the "gold standard". I recently installed a Banks air intake, programmer, and exhaust system ($2500) and the performance is startling. Stock, average fuel economy was 16.2 (70 mph+ freeway); I hope the Banks package increases that up to 2 mpg. I stopped to watch a local, weeknight rodeo event in Paso Robles, CA and there were eventually 40+ trucks with 20-30' trailers, all diesels: 1 Chev, 3 Fords, the rest GMCs.
Needs Help
Totally unimpressed, 06/17/2009
2008 GMC Sierra 2500HD SLE2 4dr Crew Cab 4WD SB (6.0L 8cyl 6A)
1 of 1 people found this review helpful
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.
My first 3/4 Ton Truck & Diesel
Ryan, 02/11/2010
2008 GMC Sierra 2500HD SLT 4dr Crew Cab 4WD LB (6.0L 8cyl 6A)
1 of 1 people found this review helpful
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.
Absolutely Amazing!
Roper, 03/02/2008
2008 GMC Sierra 2500HD SLT 4dr Crew Cab 4WD SB (6.0L 8cyl 6A)
1 of 1 people found this review helpful
I have owned 6-7 GM products over the last 25 years and I can honestly say that the appointments and driving ability of this vehicle are outstanding. Everything is perfect
One Great Truck
Big Rob, 12/03/2007
2008 GMC Sierra 2500HD SLT 4dr Crew Cab 4WD SB (6.0L 8cyl 6A)
1 of 2 people found this review helpful
I purchased my 08 in October and now have 5000 miles on it. The fuel economy is around 16 in city and 18 on highway, but I am still in break-in period and expect improvement. Economy drops quickly north of 70 MPH. The Duramax and Allison are a great powerteam and while you can hear it shift, you cannot feel it. Interior on the SLT very well laid our and looks like it should be in a luxury car. The GM 100k warranty is a big plus. My only concern is the 26 gallon fuel tank is too small for hauling heavy trailers.
Well maintained engine took a crap at 60,000 miles
Roy A. Surges, 09/17/2015
updated 03/21/2019
2008 GMC Sierra 2500HD SLE2 4dr Crew Cab 4WD LB (6.0L 8cyl 6A)
1 of 5 people found this review helpful
At 50,000 miles and 6 years old all auto door locks stopped working. At 60,000 miles lifter rockers failed and damaged cam shaft requiring a complete engine rebuild or replacement. I maintain my vehicles meticulously and have a toyota with over 300,000 miles on it. This truck is a huge disappointment and I will never buy a GM product again. Updated review at 80k miles all the other parts of the vehicle have begun to deteriorate. Seats, door handles remote mirror operation. I only keep it because it's paid for and I have 2 kids in college. It has not seen hard use. Goes off road and in the snow a few times a year on my fishing and hunting trips. I will reiterate that I will never buy a GM product again. Changing a burned out front headlight is a 2 hour affair. By a Toyota! It's worth a few extra bucks.
- Safety
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- Reliability
- Value
6.0 L Gas engine no slouch
my new truck, 06/05/2008
2008 GMC Sierra 2500HD SLE1 4dr Crew Cab SB (6.0L 8cyl 6A)
0 of 0 people found this review helpful
This is the first 3/4 ton truck I've ever owned and it is great. I've had Fords in the past and know people with both the F250 and F350. They've had too many problems for me to even consider a Ford. The GMC is built stout, and while the gas engine lacks the torque that the diesel engine has it is the perfect engine for someone who does not tow all of the time. It has plenty of get up and I'm getting around 14 MPG right now on the freeway at 75-80 MPH. Many of thr trucks I see pulling large trailers these days are GMC or Chevy, they must be doing something right. PS, while gas prices are high right now the purchase incentives are even higher, good time to buy a gas hog!
This is one super 3/4 ton truck
Bill, 07/15/2008
2008 GMC Sierra 2500HD SLE2 4dr Crew Cab 4WD SB (6.0L 8cyl 6A)
0 of 0 people found this review helpful
Bought an 08 Duramax 4x4 last month and just love the this truck. Ride is very predictable for a 3/4 ton, little harsh but if you wanted a smooth ride go with the 1/2 ton. The diesel has got a lot of horsepower. I love the quick acceleration this truck offers. I pull a trailer that goes about 6000 lbs. If you're looking for a truck to tow and gets generous fuel economy this is the truck.
Had to get rid of it
woof_breff, 09/06/2014
updated 09/06/2019
2008 GMC Sierra 2500HD SLE1 4dr Crew Cab 4WD LB (6.0L 8cyl 6A)
0 of 0 people found this review helpful
The GMC 2500HD is powerful, looks good, and can haul a ton of cargo without a problem. Has a stiff ride and a gas guzzler. The interior is somewhat simple and spartan but has nice accents, very roomy. The gas version has a nice roar to it and it picks up quite fast. The problem was the engine was too powerful for the tranny. The tranny went out a couple times and we had to move on. It was tough as nails otherwise.
- Safety
- Technology
- Performance
- Interior
- Comfort
- Reliability
- Value