Jump to content

My truck finally showed up, 2015 Sierra Denali 6.2

hurricanoday

Recommended Posts

2018GMC Senior Enthusiast

2018GMC

Posted
Posted

Congrats! Are you keeping your 04 SD? What kind of MPG did your 04 get with the 6.0?

hurricanoday Enthusiast

hurricanoday

Posted
  • Author
Posted

Congrats! Are you keeping your 04 SD? What kind of MPG did your 04 get with the 6.0?

No I will be selling the 04, friend is trying to buy it for about 10k but might try get a little more on cl haven't decided if a little more money is worth the craigslist hassle. With a blackbear tune, gibson exhaust and volant intake I get about 13-14mpg haha. I said in a previous post gm/epa was lying their ass off to say that truck gets 14city-17hwy. Maybe on flat ground with a tailwind

 

I have been commuting about 30 miles each way to work mostly hwy and still getting around 14mpg according to the computer and that is babying it 60-65 on the hwy. Seattle I5 has some hills though.

 

The new truck is already saying 16mpg (only 100miles) and has been mostly city

2018GMC Senior Enthusiast

2018GMC

Posted
Posted

No I will be selling the 04, friend is trying to buy it for about 10k but might try get a little more on cl haven't decided if a little more money is worth the craigslist hassle. With a blackbear tune, gibson exhaust and volant intake I get about 13-14mpg haha. I said in a previous post gm/epa was lying their ass off to say that truck gets 14city-17hwy. Maybe on flat ground with a tailwind

 

I have been commuting about 30 miles each way to work mostly hwy and still getting around 14mpg according to the computer and that is babying it 60-65 on the hwy. Seattle I5 has some hills though.

 

The new truck is already saying 16mpg (only 100miles) and has been mostly city

Craigslist is a PITA but eventually things sell after dealing with people's BS. The huge plus is it's FREE. autotrader and eBay are good options but you have to pay. I get attached to vehicles. Lol

stevencox93 Enthusiast

stevencox93

Posted
Posted

 

Mine's the same. Service guys at the dealership have said the unlocked ECM used for "police pursuit" models show the truck will do 140mph. I wouldn't dare take mine anywhere near that.

 

Y'all have locked speedos? I've been 101 and it would of kept going

Tri-C Enthusiast

Tri-C

Posted
Posted

thanks everyone, took a while but worth it.

 

A little update, looks like the dealer didn't do the tsb for the headlights so I am going to follow up with them and have it done just to see the difference before I buy some hids.

 

 

Also just bought some 22 bridgestone tires off discount tire direct ebay, have some 22s in my future haha. What do you guys think the 20 denalis are worth unde 100 miles?

 

GM reportedly changed the headlights on units built on and after January 27, 2015. You might get a copy of your build sheet from the dealer as it shows the exact assembly date.

 

Of course, if your door jam sticker shows that it is a "2/15" build, then you will know it was built after the change.

hurricanoday Enthusiast

hurricanoday

Posted
  • Author
Posted

 

GM reportedly changed the headlights on units built on and after January 27, 2015. You might get a copy of your build sheet from the dealer as it shows the exact assembly date.

 

Of course, if your door jam sticker shows that it is a "2/15" build, then you will know it was built after the change.

I'm pretty sure my truck was build mid Jan, but I will double check. I showed the dealer the tsb and they were going to work on it. I talked to them today and they claim the bulbs are hard to get and go through someone higher up. I said there are many complaints online about the lights and that I personally thought the lights were okay but who wouldn't want brighter headlights. Then I said I can complain if you want as that is what he said tsb's were for.

 

I will be getting hids but def getting this update first

hurricanoday Enthusiast

hurricanoday

Posted
  • Author
Posted

A little update, truck is doing great. Took it to the dealer and got some new mudflaps, the bulbs still haven't came in and they are saying they are hard to get so I dunno. They did say that the bcm update was already done from the factory so my current bulbs have the higher voltage but not sure if that makes sense.

 

As I said earlier I didn't think the bulbs were that bad and couldn't understand how people said they couldn't see in dark back roads. so maybe already having the tcm update explains that.

CounterMeasure Enthusiast

CounterMeasure

Posted
Posted

A little update, truck is doing great. Took it to the dealer and got some new mudflaps, the bulbs still haven't came in and they are saying they are hard to get so I dunno. They did say that the tcm update was already done from the factory so my current bulbs have the higher voltage but not sure if that makes sense.

 

As I said earlier I didn't think the bulbs were that bad and couldn't understand how people said they couldn't see in dark back roads. so maybe already having the tcm update explains that.

 

TCM is the transmission control module, so it would have nothing to do with the headlights. The BCM controls all the power output to various components, and that's the item that is flashed so that it outputs more voltages to the headlights. I suspect all it really does is change the PWM rate to the headlights myself.

hurricanoday Enthusiast

hurricanoday

Posted
  • Author
Posted

tcm, bcm, atm sorry for the confusion, thanks for clarifying post edited. Dealer said it adds more voltage but I have no idea

GPGuy Senior Enthusiast

GPGuy

Posted
Posted

You must be excited. Very slick looking rig.

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Latest Articles

  • Posts

    • Chuck FB
      2024 Silverado 2500 HD with the 6.6 Gas (L8T) Engine

      By Chuck FB · Posted

      How many miles were on the truck when you bought it and was there some form of oil change history generated through a dealer or an independent shop although not much would show up if the owner had changed their own oil. Just curious if it was a maintenance issue or if there was something off from the start, surely one would think the original owner would have realized it was using a lot of oil, its hard to go back in time and find out the true story of mysteries like this. Well hopefully the warranty company will go for it and just install a new engine, that would be the ideal outcome.    I still have so few miles on my truck as per not quite 9000 and will be changing the oil shortly which has around 2700 miles on it or so and its down so little on the dipstick from where it was at the beginning of this oil change that I could make the "claim" that it uses no oil but in reality would be a very small amount, less than a 1/16 of an inch. Just driving empty/not towing and easy driving so hard to say what it would do if it had a load behind it for oil consumption. So far very impressed with the very minimal oil usage. 
    • BIGBOYS
      Doors lock and mirrors fold in while driving

      By BIGBOYS · Posted

      I have a 2015 Silverado and sometimes I can not get in to the truck. I use the key to unlock the driver door. Something is locking the truck when I unlock it, last night I left the truck open and this morning it was locked with the mirrors folded in. This happens while driving so it is now a safety issue. I reach down for the folding button and they open, then they close again.  Any advice, thank you,   Ed
    • Paul8556
      Headlight issue...

      By Paul8556 · Posted

      Did you ever find a resolution to this? my 2019 Silverado 1500 is showing the exact same headlights issues with the exact same symptoms.  would help a ton if anyone has any advice on this or better yet a known solution..
    • RyanbabZ71
      Gas Prices

      By RyanbabZ71 · Posted

      Wawa and Meijer here have ethanol free (88 & 89) I use for my mower and lawn equipment.  Its not much more than reg.  I paid $3.29 a few weeks ago.  
    • Atlas
      Wow I'm in a pickle. (Broke down truck) and a story.

      By Atlas · Posted

      tl; dr I've now reached the 6th floor of hell. I'm chronicling my journey for my morning readers.   Pulling the top of the intake apart was moderately easy but it involved a lot of parts, connections, and minutae. I was preparing for the new fuel lines to arrive ("nut and bolt kit" it's called). The fuel line connections are notched and held in place by the manifold and a metal plate with a T27 screw.   It's on the back of the intake, under the firewall, with little clearance, and two hard metal fuel lines in the way. I was using Franken-tools (weird combinations of 1/4 inch ratchet with/without an extension, with a bit holder for my T27) to get in there. One of my sockets and bits fell off and has yet to emerge on the floor. I lost a second setup and that's when I almost started throwing tools. But that was the point at which I had gotten traction on the Torx head, and it promptly stripped. No more traction.   I started humming "1-877-kars-4-kids" because I was about at that point. You know what? I'm $1500 into this thing and I can make it disappear just as quickly. This isn't fun anymore. I had spent a lot of time already "tidying" around the engine bay: Fixing all the "someone's been here before!" BS. The truck has been exclusively dealer- and shop- serviced and I'm reminded of why I never let other people work on my cars unless absolutely necessary.   Speaking of dealer service. This truck has a 1" stack of records going back to 1995. I put them all in an excel spreadsheet, date/mileage/description.   The CPI spider has been replaced 4 times in 85k miles. The EGR? Another 4. Multiple, multiple O2 sensors. One Cat. 4? Sets of plugs and wires, and I swear half the stack is diagnosis paperwork for "misfire, runs rough, extended crank, dies at stoplights".   GM was producing some proper crap back then. And it was still well within the era of brittle/crappy plastic. (Windows 95 was released the same month this truck was sold new, we HAD the technology!!)   There (was) a plastic shroud around the evaporator core and HVAC fan in the engine bay. I noticed a chunk of it missing so I poked at it some more and it literally shattered. Touched it some more and pieces were crumbling off. Had a good laugh. Clearly whatever plastic garbage they were using had broken down over 30 years and was literally turning to dust. That was a good half hour of using a shop vac to remove the rest of it.   Back to it.   I was going to give up for the evening but then decided I'm already level 10 pissed off at the stripped screw: G* D* it, give me my tools back -- and my JOY. We'll do this the hard way: The whole intake is coming off.   Blazer won Round II. After finally finding and accessing the 12 intake bolts and using a pry bar to unseat it from the heads, it popped loose in an explosion of gunk and grime raining down into open ports. Awesome.   6 times I reminded myself: Be careful of the temperature sender on the front of the intake.   YEAH, I forgot again and snapped it clean off in the removal. Add another $20 to the ever-growing list of new parts this thing is consuming.   The shame is, long before removing the intake, I had changed the oil in prep for Tuesday's momentous fuel line replacement that was going to be the magic fix and I'd have a running Blazer to tool around in this next weekend. The intake removal, including raining gunk, also gushed dirty coolant all over the valley. Of course it did. Welp, there goes another $35.   I now need an intake gasket set, bolt set, coolant temp sensor, another 5 quarts of oil, some RTV. Don't worry, I've already got 3 new jugs of Dexcool and a thermostat waiting. I'll fill it with clean water first to get it running, dump it, and then add the Dex later on in case... well, let's not go there. I'm only tearing this down once, next time the truck is going on Marketplace for FREE.   Oh, and I'm going to need vacuum hose for all the stupid connections placed at the rear of the engine which have since disintegrated. Come on, GM....tell me you don't do that anymore?   Oh, and the ears on the distributor where the cap screws down are both cracked. I mean, why not put a new distributor in it too. You get a distributor, YOU get a distributor, Everyone gets a new distributor!   This truck isn't out of the woods yet...I'm already questioning how much more time I'm willing to sink in.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...