Overview & Reviews
Other than satellite radio becoming standard across the line, the 2008 GMC Sierra 2500HD sees no changes.
- Massive towing and hauling capacities, refined and quiet ride, excellent build and materials quality, comfortable seats.
- Side-impact airbags and side curtain airbags are not available.
User Reviews:
Showing 1 through 10 of 27.00-
A refined, well built truck - 2008 GMC Sierra 2500HD
By MountainMan - November 11 - 12:26 pmWell designed, well built truck that is a pleasure to drive, but it struggles to pull my small 6000lb 5th wheel trailer over some moutain passes. ATF temps up around 215 deg although total weight well within published rating. Front end styling is ugly.
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A Decent Truck With a Poor Drivetrain - 2008 GMC Sierra 2500HD
By Kevin H - January 10 - 5:33 amThis 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 wouldnt 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).
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Transmission/ride - 2008 GMC Sierra 2500HD
By Craig - September 14 - 9:13 pmThis truck is by far the worst riding vehicle i have ever owned. I understand it is a HD, but come on GM, youre 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.
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Not a fan - 2008 GMC Sierra 2500HD
By notafan - September 9 - 9:13 amThe fuel economy of this truck leaves a lot to be desired. My truck is GPSd 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.
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Needs Help - 2008 GMC Sierra 2500HD
By Totally unimpressed - July 4 - 8:56 amBefore 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 Ill 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.
