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2007 Chevrolet Silverado and GMC Sierra - First Impressions



  • jmkrobotjmkrobot Posts: 6

    Okay, so, what your saying is that people who are used to driving "Gasoline" powered HD trucks getting 10- 13 MPG regardless if towing, hwy, or city driving... Should not look to the "Deisel" as a solution for better performance and mileage?

    How often does the Oil & Fuel Filters need to be changed and what is the typical cost?

    What other additional maintainance fees can I expect compared to Gasoline engines?
  • skytop1skytop1 Posts: 106
    You can get diesel opinions all over the net. You cannot look at diesel in a truck as you do in a passenger car. In a passenger vehicle, it is all about mpg. In a truck, the mpg is not the main issue, it is hauling ability. It's that 550 to 600 foot pounds of torque that is the goal to have harnessed for WORK. Also, diesels deliver this massive power from idle up. A gas engine needs high RPM to achieve power. With such power, higher gear ratios can be used, thereby improving power, efficiency, and fuel economy. Additionally, diesels generate peak power at lower rpm (1800-2300 for diesel vs. 4000+ rpm for gas engines), they have a much longer service life. Again, high annual driving miles is the reason to own a diesel.
    The mpg of a diesel will vary with what you are hauling around. Unloaded, most folks (if sincere) will tell you they get 14 to 18 miles a gallon. They typically get about 25% better mpg. Higer operating efficiency and diesel fuel being more energy dense yields this advantage. My friend tows his 30' trailer and gets about 10 mpg on the road. But he can easily cruise at 75mpg and maintain that speed up mountain passes. That,my friend, is what you are paying for.
    The fuel mileage difference with gas is not astounding but as I stated, if you drive enough miles, the difference becomes meaningful. Diesels need roughly twice the amount of oil as gas engines since they run 'dirty' and are sensitive to fuel contamination. They need real attention to oil and filter maintainence. Prudent use of additives are an additional expense. Don't forget to add in the noise, smell and reduced throttle response of the diesel. Recently released low sulfur diesel fuel will ameliorate smoke, sulfur and particulate production in diesels. Thus, operation won't be nearly so sooty and smelly if you use this finer grade fuel. This is a plus.
    A diesel is a working man's tool and not not a casual toy unless you have deep pockets or are making a statement. Do your own due diligence.
  • jmkrobotjmkrobot Posts: 6
    Fair enough.

    Thanks for your input.
  • rufous03rufous03 Posts: 3
    I just took delivery of my new style 2007 Sierra 1500. Overall, I really like it, two things that really frost me however is the fact that some engineer has redesigned the headlights so that one needs tools to replace the bulbs. Models from 2002 to 2006 all one had to do was remove two pins and the assemblies came out very easy. Dummies!
    The second is that even if you put a high quality tonneau cover on the box, there is no way you will be able to keep your cargo dry. At the front of the box there are two large areas where you can see daylight, the tailgate is even worse. I can put three of my fingers in the space in the lower corners, and I can see a 1/2 space all around the tailgate. As far as I can tell, there are no gaskets available that will correct the problem. GM's response was less than favorable. Anyone have a solution to that one? :mad:
  • skytop1skytop1 Posts: 106
    There is a GM kit as well as an aftermarket kit that will seal up your cargo box. This is a common situation with Ford and Dodge as well. I believe I saw it on some camping site that sells tent conversions for cargo boxes. As for the lights, thank technology.
    I have some minor problems. My bug shield shattered when my shirt cuff caught on the pointy edge, the plastic covers on the seat belt adjusters broke off when I touched them adjusting the belt height. Wish they put a hand grab on the driver's side 'A' pillar like every other car maker. The GM seat covers I purchased have a terrible rubbery material surface which is tacky to touch, hot, and won't stay put on the seat. I am returning the set. I wish there were more hook attachment points low in the cargo box to secure short items like 5 gallon paint buckets. Specs say engine has lots of power but I think it is too cammy and does not offer useful midrange grunt. Nope, not perfect, but better than before.
    GM engineering just called me asking me detailed questions as to what problems I had or what I want changed. Good to see them seriously persuing quality and better engineering/design. You will be getting a call from them, too.
  • rufous03rufous03 Posts: 3
    If there is a GM kit, not even the GM help line knows about it. I was considering looking at the aftermarket products, but after checking the tailgate area, I see no way any gasket I have seen would work. If you put two gaskets, one on the tailgate and one on the box, they might touch each other. I haven't had it out on the highway or into the mountains yet, so I can't comment on the power. It seems OK in the city. The other thing they changed on the '07 new style is the 40-20-40 front seat design. They no longer have the large storage area under the front seat, it's about 1/2 the size of the older body style.
  • skytop1skytop1 Posts: 106
    You can look at the following:
    1. Extang 1140 MaxSeal Tailgate Seal (a rubber moulding and not foam).
    2. TrailSeal Tailgate Gasket Seal Kit (a tubular approach)
    3. Retrax tailgate gasket (very popular and effective)

    As for the seats, the new rear design is a break through. Really! (I have buckets in the front so I cannot speak for your 40-20-40 and my seats have no bottom storage either). The rear is split about 70-30 but the big news is the fact that there are NO OBSTRUCTIONS under the seat. You can put tons of stuff under them OR....I fold the 70% seat bottom up and use the large floor area to store my stuff in two large Rubbermaid containers.
    One other neat thing, this is the first truck I have that has a power rear cab window. When I don't use A/C, opening my driver's window and then the rear window allows for the most wonderful flow through ventilation imaginable. It is far, far more effective than opening the rear door windows. No low frequency pounding your ears as with my earlier trucks, just cool pleasant airflow. Everyone should order the power rear window.
    BTW, my 6.2L fuel mileage (with A/C on) in city stop and go is 14.6, my town and country is about 16.8 and my highway is 19. After break in and my first oil change to synthetic, I hope to see some incremental better mileage. Premium is around $3.35 so I don't let the tank get below 2/3 so I only have $30 fill ups. Just psychological, but it mutes the gas expense pain! :cry: :blush:
  • rufous03rufous03 Posts: 3
    Thanks for the links. I too have bucket seats as the 40-20-40 I like from the older version was not an option. Power rear cab window I would have ordered, but again, this did not appear as an option at the dealer, I'll have to ask why it wasn't because I did mention to them that I liked that feature after seeing it on a Toyota truck. I have the new 5.3 flex fuel. The 2004 I just sold had the Duramax which I really liked, but for 2007 they priced it out of my budget. The gaskets for the new style box may not work. Totally different arrangement compared to the old style box. The dealer is going to check the Chev Avalanch to see what they use on it.
  • peaeyepeaeye Posts: 4
    Anyone had any experience with leveling the front end of a 2004 Silverado Z71?
    My torsion bars are maxed out. The torsion keys seem like an easy way to go but I hear they can cause front end problems.
  • skytop1skytop1 Posts: 106
    You're posting in the wrong section. Go to the parent and look for your truck thread.
  • tsullytsully Posts: 30
    I have found that the navigation screen is to bright at night.
    I know there are 3 available adjustments, auto, day, and night. There are settings to adjust the day and night brightness. Still after adjusting those settings I have found that I have to actually switch from day to night to get the desired brightness of the screen. The auto setting is to bright at night and I can't find a way to adjust that setting.
    It does become frustrating when I have to adjust the screen setting from day to night when it is dark out and then from night to day when it is light out. Any suggestions?
  • skytop1skytop1 Posts: 106
    Tape some kraft wrapping paper over it or wear dark sunglasses...your choice. My screen darkens plenty using the manual adjustments setting and the black night time theme sufficiently compensates for any brightness . Better check with your dealer. Perhaps there are undocumented adjustments available.
  • I have a suggestion for you. I leave mine on night display all the time and adjust the brightness down. During the day it still has more than enough light. I cant stand it being too bright at night either.
  • jsorensenjsorensen Posts: 7
    Just an update on my truck. It was one of the last '07 trucks built I believe. GM almost wouldn't take the order but the salesman worked it through. The truck was built last week and shipped this week. I was able to get a VIN number by June 4, the last day of the Memorial Day sale. I get $1000 bonus cash, $1000 certificate from dealer, and $1250 cash or 0% interest for 3 years. I'm taking the 0% and investing the cash in monthly CD's, thus giving me interest (less 30% taxes), making it more profitable than taking the $1250. Truck should be here in 10 days I hope! ;)">
  • skytop1skytop1 Posts: 106
    I am surprised that no review article has found this problem. My '07 Sierra suffers from a seriously major blind spot caused by the 'A' windshield pillar bulkiness combined with the 'triangle' solid plastic window filler adjacent to the side view mirrors. All this thick mass thoroughly blocks the driver's view of an entire car approaching from the right and is almost as bad on the driver's side.

    How the hell do automotive designers and testers let something this major get by them? Are they totally blind or do they just not care??? This flaw is going to cost some people their health or even their lives in resulting collisions. I have now taught myself to crane my head from one shoulder to the other in an attempt to see around the A pillars when at an intersection. I fear what will happen while entering an intersection at speed and a car or motorcycle is hidden from my view by the pillars. This really is a terrible design flaw. Maybe other brands are guilty of this as well, but my GM truly stinks on this point.
  • 1offroader1offroader Posts: 208

    I had never noticed that before so I went out and sat in my Silverado. No problemo my friend. The only way it would be a problem is if I was maybe a foot shorter than I am (6'3"). Are you relatively short? I don't mean that in a disparaging way. I just don't see a problem. Or maybe the Sierra and the Silverado have a significant design difference???? The mirrors themselves are large, but what truck mirrors aren't large? They're supposed to be big for better visibility, esp. for towing & etc.

  • obyoneobyone Posts: 8,054
    A pillar, you should see the one on the Titan. Measures over 12" at the base.
  • skytop1skytop1 Posts: 106
    Height of driver is irrelevant. The pillar is virtually uniform in bulkiness from top to bottom. Add the triangle filler panel and it blocks the view severly.

    Imagine the size of an approaching car from the right side when it is about 100 feet away. Pretty small, huh! The thick pillar conceals it all so you don't see two tons of steel barreling down on you. I know, it almost got me into an accident because I could not see the oncoming vehicle. Now I try my best to look around I need to have an "Omen" rotating head.
  • obyoneobyone Posts: 8,054
    more like "Exorcist"
  • schlogschlog Posts: 19
    I tried to evaluate your complaint in my Silverado and I just don't see your issue. Forward view and rear view mirror all are more than adequate for me. I'd use the term "Major" for things like exploding gas tanks.
    Generally, you can find an issue with anything you evaluate and we all have opinions, this is mine.

  • skytop1skytop1 Posts: 106
    Right you are!~ Da devil made me do it!
  • skytop1skytop1 Posts: 106
    I would believe that the A pillar in the Silverado is the same as in the Sierra Denali. Respectfully, I still stand by my statement. The design is a stinker and dangerous. This danger is reinforced everytime I drive my truck.
  • 1offroader1offroader Posts: 208
    The pillar is uniform top to bottom, correct. But I look OVER the black plastic triangle that the mirror is attached to. If I was a foot shorter, a very tiny car or maybe a motorcyclist could hide from my view if it was quite a distance away, but not otherwise. That's why I asked that question.

    100 feet - that's 30 yards, or 30 normal paces. Try it. Park a car 30 steps away from your truck and see if it can "hide". No way.

    I drove my truck to work today, 40 mile round trip. Freeway, surface streets, etc. There is NO FRIGGIN WAY that a car, even a compact, can hide behind the A-pillar and mirror/triangle unless it's too far away to be a threat. Man, I just have no idea what you're talking about.

  • john1972john1972 Posts: 1
    I want to lift my '07 Silverado and was looking at the Rancho 4" lift. Some of the local shops say that there are problems lifting the Silverado that is equipped with the Stabilitrac system. Has any one heard of this or has anyone installed a lift on their truck and are you experiencing any problems?
  • 1offroader1offroader Posts: 208
    Makes sense to me. There may be a sensor that can tell when the center of gravity is shifted and the stabilitrack engages.

    I believe the crew cab comes standard with the stabilitrack. It's an option on the others as I recall.

    Look into it before you do the lift. There may also be a way to disengage it permanently, but you'll lose an important safety feature. I disengage mine when offroad using the switch on the dash, but re-engage when I hit the pavement.

  • tsullytsully Posts: 30
    Well I know it can be done. I drive by a dealership everyday on my way to work and they have two silverados sitting out for everyone to see. You can't miss them. Both of those trucks look like they have at least a 4 inch lift on them. These trucks are brand new. I don't know if the dealership did this aftermarket mod or not. I suspect they did. Anyway I don't think a dealership would sell a lifted truck without the design being good enough. Troy
  • inthebizinthebiz Posts: 6
    My 07 Sierra did not come with the key locking tailgate. Does anyone know if the latch can be swapped with a key lock latch??

    Also does anyone know the GM Part #s for the cargo rails and cargo divider?? I would like to try to purchase online and cant find the part numbers.
  • skytop1skytop1 Posts: 106
    Try this:
    POWERGATE ELECTRIC TAILGATE LOCK -- Internal Power Tailgate Lock, Wires Directly Into Your Electric Door Locks, Locks Your Tailgate Every Time You Lock Your Doors
  • skytop1skytop1 Posts: 106
    Its actually called the "Pickup Cargo Management System"
    I have it and it's very convenient and very well machined out of aluminum. There are many useful accessories made to mount using this track system or just use it as a moveable tie down system with the 4 cars that come with it.

    Part number:
    Part Number for Bed Divider: 19155947

    GMT900 (Sierra) Pickup Cargo Management System. 2007 Silverado/Sierra. There is a new, innovative cargo ..... part number. 12498396
  • flysprayflyspray Posts: 15
    I asked about every configuration for the 07 nbs silverado 1500 from the dealer. None included power lockable tailgate. This includes the security option for the bed.

    I called the They told me that this part would fit the 07 silv new body style.

    I called the manufacturer of this part. They told me that the part did not fit the 07 silv new body style. They are working on new part that will work. ETA 6-8 weeks.

    If you have a Tonneau with power locks then a lockable tailgate is not a necessity. The Tonneau lips over the tailgate so they would have to break the cover before they could get into the bed.

    Im more interested in wheel inserts.

This discussion has been closed.