Article Comments - 2007 GMC Sierra Denali Full Test

128 messages, Last post on Mar 28, 2009 at 1:25 PM

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Article comments for Full Test: 2007 GMC Sierra Denali - The 2007 GMC Sierra Denali is GM's top-of-the-line luxury pickup, but it emphasizes the truck part of the equation as much as the luxury part. (more)

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#21 of 128 5 yr. / 100,000 mi by markisliev May 27, 2007 (8:44 am)
Congrats Sammy, Well atleast they have 5 yr. / 100,000 mi. powertrain warranty now. Seems like it would last 6 years...lol! What kind of gas milage do you get at hwy speeds? Replies to this message: shujat (May 27, 2007 5:50 pm)
#22 of 128 Re: 5 yr. / 100,000 mi [markisliev] by shujat May 27, 2007 (5:50 pm)
Replying to: markisliev (May 27, 2007 8:44 am) Hey Mark, Thanks! Well we went furniture shopping, and on the freeway it averages according to the trip computer 17-18mpg if youre going in the 55-65mph range. I usually leave the computer to miles to empty mode to see the difference and when I left the house it was 251 miles to empty, and after a day end it was 230 to empty. I am absolutely happy with it so far, and love the remote start feature, because it turns on the A/C by the time we walk to the truck its nice and cool on a hot day like today. I considered other brands, but I had GM supplier through my company and I couldnt pass it up. Oh and if it adds any brownie points, I got glaring head turns by people today. I have unfortunately not seen another Sierra Denali on the road. I hope they are popular over time. Thats my two cents.... Sammy
#23 of 128 Re: 2007 GMC Sierra Denali Full Test [1offroader] by davethecarnut May 27, 2007 (8:34 pm)
Replying to: 1offroader (May 18, 2007 6:30 am) Offroader, When doing acceleration tests, you ain't gonna see "final drive gear". In other words, the trans isn't gonna reach top gear by the end of the test Is that clear? Replies to this message: 1offroader (May 28, 2007 7:38 am) davethecarnut (May 28, 2007 8:39 pm)
#24 of 128 Re: 2007 GMC Sierra Denali Full Test [davethecarnut] by 1offroader May 28, 2007 (7:38 am)
Replying to: davethecarnut (May 27, 2007 8:34 pm) Dave Not clear at all. EACH gear has a final drive ratio, and the final drive ratio changes with each shift of the transmission. Final drive ratio is just what the rear wheels see at any particular point in time regardless of what gear the transmission is in. Examples: 1st gear start - let's say that first gear is 4.00, and the rear diff is 4.10. The final drive ratio is 4.0 x 4.1 = 16.4 4th gear at hwy. speed - let's say 4th gear (in a 4 sp. trans.) is 1.00 and the rear diff is 4.10. The final drive ratio in top gear is 1.0 x 4.1 = 4.1. (If top gear is overdrive, you would multiply by somewhat less than 1.0). You can do the same calc. for each gear in the trans. Just multiply it by the rear diff. for the final drive ratio in the gear. If you have a 4x4, you would need to also multiply by the gear ratio in the transfer case. Most t-cases have a 'hi' gear of 1.0, and a 'lo' somewhere in the 2.0-2.5 range. So, in first gear and 4-lo, the formula for final drive ratio might look like this: 4.0 x 2.0 x 4.10 = 32.8 That's why 4x4 is so powerful - the extra gear reduction of the t-case makes a big difference. Are we clear on that? And that's your automotive lesson on final drive ratio for the day. I accept VISA, MasterCard, and cash. No personal checks, please. 1offroader Replies to this message: davethecarnut (May 28, 2007 8:39 pm)
#25 of 128 lower 1st gear.... by markisliev May 28, 2007 (8:26 am)
So what that means is that the Denali has a slightly more agressive 1st gear than the Tunda if the Yota comes with a 4.10 rear right? Hey, anyone know where we could find complete 6L80E specs to compare every gear? Tundra 1st gear 3.33 x 4.10 rear axle ratio = 13.65 Denali 1st gear 4.03 x 3.42 rear axle ratio = 13.78 * I pulled the gearing info from the following article... http://www.pickuptruck.com/html/2007/gmc/sierra/roadtest/page2.html "The Denali’s final drive ratio is a stocky 3.42:1, to help push up its CAFE scores, but the 6L80E’s broad range compensates by using an extremely low 4.03 first gear and VVT to ensure quick starts off the line. The tested Tundra had a much lower 4.1 rear axle ratio, as it was optionally equipped with a trailering package to tow a hefty 10,400-lbs - 1,700-lbs more than the Denali - and it used a 3.33 first gear for launch. One final consideration, the Denali ran the track shod with 20-inch chromed dubs while the Edmunds Tundra used 18-inch wheels." Replies to this message: 1offroader (May 28, 2007 11:14 am)
#26 of 128 Re: lower 1st gear.... [markisliev] by 1offroader May 28, 2007 (11:14 am)
Replying to: markisliev (May 28, 2007 8:26 am) markisliev, that's right. The final drive ratio for first gear is slightly lower, or more aggressive, in the denali. HOWEVER, if I didn't confuse you enough, the wheel size can make a big difference. The larger the radius, the higher, or taller, the final ratio. The fact that the denali had 20" wheels vs. the 18" tundra does not tell the whole story. It's the overall radius that counts and since the 20" tend to have lower profile tires the overall radius may be about the same as the tundra 18". For example, when guys go from normal tires to big off road tires, they often have to gear back down to compensate for the much larger radius. For example, if they had 4.10 rear end they might have to switch to a 4.56 when they install the big tires. Otherwise, performance gets sluggish. And, on a 4x4, you also have to switch the front end gears too. This can get expensive. 1offroader
#27 of 128 denali is better by markisliev May 28, 2007 (4:38 pm)
The Denali is probably a good bit faster than what edmunds found IMO...They must not have a graceful foot... A 400lb heavier GMC Yukon (same motor) with 20 less hp managed a 6.2 sec 0-60 and still trapped at 94mph....better than the tundra, just like pickuptruck.com found with the AWD Denali... http://www.caranddriver.com/shortroadtests/10771/short-take-review-2007-gmc-yukon-denali-2007-gmc-yukon-denali-specifications-page2.html The 200lb lighter 2wd Sierra Denali will probably whoop some a$$ with a good driver.... I prefer pickuptruck.com's review of the AWD version, the trap speed and 0-60 seem to match what car and driver found with the heavier yukon... http://www.pickuptruck.com/html/2007/gmc/sierra/roadtest/page1.html
#28 of 128 Re: 2007 GMC Sierra Denali Full Test [guysykes] by idriveasunbird May 28, 2007 (7:43 pm)
Replying to: guysykes (May 25, 2007 12:37 am) Well Mark if you knew what I was talking about I'm sure it would have all clicked... well lets not wait around for that I guess. I was replying to a comment about the ability to put aftermarket parts on a truck. Someone had stated that the Tundra had no chance at keeping up with the Denali in the aftermarket world and I disagreed. My statement about the less than $30,000 5.7 L Tundra was completely accurate and relevent to what I was talking about, nice try in keeping up with the conversation though. Finally, I didn't realize people bought $40,000 trucks simply for the pure enjoyment of going to and from the gas station as much as possible while sitting in leather seats. Apparently that is what the Denali is for. As far as a pickup truck goes, and that afterall is what the Denali is, the Tundra is more capable in every aspect a pickup is used for. Towing hauling and offroad ability. Looks are completely personal, case in point is last years Silverado/Sierra which quite possibly was... in my opinion... the ugliest truck ever made. You definetly can buy a Tundra with just about everything your Denali has though and a few things it does not have, it will cost roughly the same as well. You can even buy a Tundra with more than your Denali can offer and spend a little more if you choose. Either way you slice it you can get essentially the same options at a similiar price with more Truck capability from Toyota. It's OK to be upest and not acknowledge the fact that you purchased an inferior product simply based on looks. Many Americans buy grossly inferior products based on name alone, you will fit right in. Replies to this message: idriveasunbird (May 28, 2007 8:08 pm) markisliev (May 29, 2007 6:01 am)
#29 of 128 Re: 2007 GMC Sierra Denali Full Test [idriveasunbird] by idriveasunbird May 28, 2007 (8:08 pm)
Replying to: idriveasunbird (May 28, 2007 7:43 pm) *Mark should be Guy Also nit picking what I say is, I don't know, elementary, especially when you make yourself sound stupid by being wrong. A turbocharger by definition is a supercharger. So what exactly was your point with the little "HAHA" after saying I must have meant turbocharger when I said supercharger? I realize this has nothing to do with what I was talking about, but I am just trying to clarify why you picked that out in an attempt to make your point look better? Replies to this message: markisliev (May 29, 2007 6:01 am)
#30 of 128 Re: 2007 GMC Sierra Denali Full Test [1offroader] by davethecarnut May 28, 2007 (8:39 pm)
Replying to: 1offroader (May 28, 2007 7:38 am) Can I sweep out your garage instead of payment?