GMC Sierra - SLT vs Denali

jernatety · June 30, 2017

Put the drive selector in M, then you can put it in m1, m2, m3, m4, etc with the +/- buttons on the shifter.

If it goes past 6, you have an 8 speed

When in M mode, it just means whatever gear you select is the highest gear it will go in. It's not like typical +/- paddle shifter that will shift on demand like a wanna-be sequential

Gotcha, never thought of that, thanks for the suggestion. All of my last three trucks have had auto shift. I tinkered with that locally around town shortly after we bought it but didn't get past 3rd before I decided to put it back in drive. I'll try that on the way home from work, (turnpike driving).

Havvkeye · June 30, 2017

It was purchased used with 12k already on it. I'm not too concerned with the decision the original owner made, It also has the chrome package and we got it for a steal. This truck is awesome and awesome looking.

It is a good looking truck - looks very similar to mine except it is white

On another note, it DID have one thing that is a thing of the past.... It had Dual Tanks on it, LOVED IT. 40 gal total fuel capacity. Wish I could still get that today. Only thing I really miss...

Was looking at Tundra's the other day when buying the lady a Camry and they had a 38 gallon tank listed. I had a 33 or 34 gallon tank on my last truck (Titan) and loved it as well. I am not sure why that isn't a more popular option.

jernatety · June 30, 2017

It is a good looking truck - looks very similar to mine except it is white

Was looking at Tundra's the other day when buying the lady a Camry and they had a 38 gallon tank listed. I had a 33 or 34 gallon tank on my last truck (Titan) and loved it as well. I am not sure why that isn't a more popular option.

I see you have K&N Intake on your signature. Any chance you can post a video of starting up the truck and engine rev? I've been debating the K&N for two reasons. On my wife's side of the fam, Her brother, uncle and cousin, (uncles son) all have Silverado's and they all installed the K&N cold air intake. They said it helps with gas mileage and suggested I should get it as well, because it also sounds really good too. Does it change the sound that much?

Cosmic Charlie · July 1, 2017

FWIW - No Double Cab in Denali ...

redwngr · July 1, 2017

We bought ours used, it's also a 16, the salesman said, "your're really going to like this, I think it's an 8 speed too". He didn't know because we bought it from a dealership called "Carsense", they buy up off lease vehicles and resell them, most of the sales guys don't have any clue what they're selling. How would I know if this is an 8 speed, there's nothing in the manuals.

You could also verify which transmission on the glove box RPO label.

MYC is the 6 speed

M5U is the 8 speed

I

redwngr · July 1, 2017

AN3 seats on SLT are 10 way

AN3 seats on Denali are 12 way (which are not available on SLT)

Edited July 1, 2017 by redwngr

Cosmic Charlie · July 1, 2017

AN3 seats on SLT are 10 way

AN3 seats on Denali are 12 way (which are not available on SLT)

what is the added adjustment on 12 way ?

powerhaulic · July 1, 2017

what is the added adjustment on 12 way ?

Vertical lumbar

jernatety · July 1, 2017

AN3 seats on SLT are 10 way

AN3 seats on Denali are 12 way (which are not available on SLT)

It's 8 speed, got on the turnpike on the way home yesterday and tested.

So now that I know I have a question about our camper. We have a 33' camper which in the past truck, (Ram) we averaged 9 miles per gallon hitched up with tow control enabled. Which is better, using the auto shift or just leave it in drive?

And for what it's worth the cab is huge. The back windows are the same size as the front. I'm 6' tall and can practically stretch out.

Edited July 1, 2017 by jernatety

Z45 · July 1, 2017

On my wife's side of the fam, Her brother, uncle and cousin, (uncles son) all have Silverado's and they all installed the K&N cold air intake. They said it helps with gas mileage and suggested I should get it as well, because it also sounds really good too. Does it change the sound that much?

I believe I got better MPGs because I need to justify my silly purchase. You CAN'T gain mileage in a computer controlled system by changing the filter. More air = more horsepower = more fuel.

Effect of Intake Air Filter Condition on Vehicle Fuel Economy

Results show that clogging the air filter has no significant effect on the fuel economy of the newer vehicles (all fuel injected with closed-loop control and one equipped with MDS). The engine control systems were able to maintain the desired AFR regardless of intake restrictions, and therefore fuel consumption was not increased. The carbureted engine did show a decrease in fuel economy with increasing restriction. However, the level of restriction required to cause a substantial (10–15%) decrease in fuel economy (such as that cited in the literature3,4 ) was so severe that the vehicle was almost undrivable. Acceleration performance on all vehicles was improved with a clean air filter.

Edited July 1, 2017 by elcamino

JTodo · July 3, 2017

There's quite a few differences, there's a list running around here somewhere if you do a search. If you negotiate well you can get a Denali for a similar (sometimes better) price

fbachman · July 3, 2017

Was looking at Tundra's the other day when buying the lady a Camry and they had a 38 gallon tank listed. I had a 33 or 34 gallon tank on my last truck (Titan) and loved it as well. I am not sure why that isn't a more popular option.

Well, i must admit that fuel economy in trucks has improved quite a bit since my '91 F150 (had the 302 V8). I remember folks asking what mileage I was getting with that truck. I used to answer 13mpg. They would then ask City or highway?... and I would answer "correct".

My Sierra gets 16-17 all day long in suburban driving and 21+ on the highway. That adds up on range.

Most American manufacturers will size the tank for approx 400 miles range in the city. Doing the math on my truck, 400/16=25, and, hence a 26 gal tank.

I am with you, though, if there was a choice of a larger tank, I would have "bought on" for sure.

Silverado Steve · July 3, 2017

I think a 30 gallon tank wouk be about right. I think people forget gas weighs a lot so adding bigger tanks means more weight, thus less mpgs. Also many gas stations here limit each fuel purchase to 30 gallons.

NWI Denali · July 3, 2017

I think a 30 gallon tank wouk be about right. I think people forget gas weighs a lot so adding bigger tanks means more weight, thus less mpgs. Also many gas stations here limit each fuel purchase to 30 gallons.

Gas weighs 7 lbs per gallon, give or take. An extra 4 gallons (26 to a 30 gallon tank) would only be an additional 28 lbs. An extra 28 lbs on a 5500 lb truck that has a 1500lb payload capacity, you will never notice.

Silverado Steve · July 3, 2017

Hence why i said 30 pounds versus our 26 gallon. Go to 34 gallons, now you're running what would be sand tubes in the bed of your truck.

Gas weighs 7 lbs per gallon, give or take. An extra 4 gallons (26 to a 30 gallon tank) would only be an additional 28 lbs. An extra 28 lbs on a 5500 lb truck that has a 1500lb payload capacity, you will never notice.