Tow Rating For 08 Sierra Denali

[twotoejoe]

I'm getting conflicting information on the tow rating on my 08 Sierra Denali AWD, 6.2, 6 speed auto. and I can't find any factory charts for it. Anyone have any links?

[Stevens03]

Trailering & Payload

Curb Weight (lbs.) 5378

Max Payload (lbs.) 1622

GVWR (lbs.) 7000

Max Conventional Trailering, 3.42 Rear Axle (lbs.) 9400

GCWR, 3.42 Rear Axle (lbs.) 15000

Spring & Axle Capacity

Front Gross Axle Weight Rating (lbs.) 3950

Front Spring (lbs.) 3950

Rear Gross Axle Weight Rating (lbs.) 4000

Rear Spring (lbs.) 4000

 

Right off the GMC website

[twotoejoe]

Trailering & Payload

Curb Weight (lbs.) 5378

Max Payload (lbs.) 1622

GVWR (lbs.) 7000

Max Conventional Trailering, 3.42 Rear Axle (lbs.) 9400

GCWR, 3.42 Rear Axle (lbs.) 15000

Spring & Axle Capacity

Front Gross Axle Weight Rating (lbs.) 3950

Front Spring (lbs.) 3950

Rear Gross Axle Weight Rating (lbs.) 4000

Rear Spring (lbs.) 4000

 

Right off the GMC website

 

Thanks, one response I got on another website said 9300lb w/cooling package and 6300lb without! I've never heard of a 'cooling package' in regards to towing. And 3000 lbs is a LOT of difference for ANY kind of 'package'.

 

BTW, have you towed anything with your truck? I'm looking at towing a 24' enclosed car hauler with a 3500lb car inside.

[Stevens03]

Trailering & Payload

Curb Weight (lbs.) 5378

Max Payload (lbs.) 1622

GVWR (lbs.) 7000

Max Conventional Trailering, 3.42 Rear Axle (lbs.) 9400

GCWR, 3.42 Rear Axle (lbs.) 15000

Spring & Axle Capacity

Front Gross Axle Weight Rating (lbs.) 3950

Front Spring (lbs.) 3950

Rear Gross Axle Weight Rating (lbs.) 4000

Rear Spring (lbs.) 4000

 

Right off the GMC website

 

Thanks, one response I got on another website said 9300lb w/cooling package and 6300lb without! I've never heard of a 'cooling package' in regards to towing. And 3000 lbs is a LOT of difference for ANY kind of 'package'.

 

BTW, have you towed anything with your truck? I'm looking at towing a 24' enclosed car hauler with a 3500lb car inside.

 

 

Yeah, I towed a friends camaro on a car dolly. Didn't even know it there till I hit some hills/mountains and even then it wasn't a problem.

[Matt_]

I thought the 08 was only rated for 8600 or 8700 and in 2009 they increased the rating to 9300.

 

I remember this because i always thought my 08 was under rated considering the engine/trans/gear combo...

[Stevens03]

Come to think about it.. your right Matt. It is the 8600 for 2008. Not sure why when the combination is the same

 

 

From truck trends.com

 

2008 GMC Sierra Denali

Engine 6.2L/403-hp/417-lb-ft OHV 16-valve all-alum V-8

Transmission 6L80 6-speed automatic

Wheelbase, in 143.5

Length x width x height, in 230.2 x 80.0 x 73.7

Curb weight, lb 5400

GVWR, lb 7000

Payload capacity, lb 1600

Max towing capacity, lb 8600

Max cargo capacity, cu ft 53.2

0-60 mph, sec 6.5 (TT est)

Quarter mile, sec @ mph 14.5 @ 93.0 (TT est)

EPA fuel econ, city/hwy, mpg 16/20 (est)

[twotoejoe]

Thanks guys. I FINALLY found a 2008 brochure. Actually for AWD, it shows 8400# tow rating.

 

http://www.carlblack.com/vehicles/2008/gmc/sierra/sierra.pdf

[Matt_]

Come to think about it.. your right Matt. It is the 8600 for 2008. Not sure why when the combination is the same

 

Yeah it's kind of weird. I think it was just under-rated... kind of like an "oops, we rated that truck the same as the 5.3L 4L60E?" and then they corrected it in 2009 and bumped the rating up.

 

I think the 8.5" 10 bolt is the new limiting factor in the rating; if they gave it the 9.5" 14 bolt like your truck came with that would have been sweet.