Howdy, Stranger!

It looks like you're new here. If you want to get involved, click one of these buttons!

Chevy Silverado and GMC Sierra Accessories and Modifications



  • You do NOT have the Corsa. Borla makes the GMPP Catback sytems now and it's the Borla that requires removing the spare tire. Corsa systems do not interfere with the spare. Trust me, I am right about this.
  • obyoneobyone Posts: 8,054
    installs it, where exactly do they put the spare? Borla makes good products and Corsa is better.
  • I have replaced all of my headlights, taillights, and corner lights with APC lights. I have not had any yellowing, however when I first put them in there was some fogging/condensation in them at times. Easy fix, drill a small (1/8") hole in the botttom corner of all your lights. This will provide enough ventilation along with the factory vents to keep the moisture down and keep them nice and clear. Just be careful and drill nice and slow so that you do not crack the lens.
  • obyoneobyone Posts: 8,054
    I just resealed mine with silicone.
  • Has anyone out there investigated putting a plow on the new body duramax? Been getting some conflicting info. Looking into a crew cab but want to put a plow on the front. Probably just a 7'6" or 8'2" BOSS, but want to make sure the front end will support it and have no warranty issues with the dealer or GM. Is there a difference in the suspensions between the Classic Series(ok for the plow) and the NBS(not ok). Seems crazy to own a heavy duty pick up with an extremely powerful engine and not be able to plow snow with it. Thanks in advance.

  • bodeenbodeen Posts: 1
    Has anyone installed a cold air intake on the 6 liter? Is it worth the $250?
    How about installing a new exhaust also?
  • obyoneobyone Posts: 8,054
    Well depends on what you're looking for. If you have a need for increase in noise then both would increase in cab noise or to

    If you're looking for performance or mileage increase...well, save your money.
  • is it ok to run a 04 5.3l without a muffler or does it really need some back pressure. Thanks for your help?
  • obyoneobyone Posts: 8,054
    Yep it needs the back pressure.
  • Thats what I thought. Any idea on what would happen if the truck was run for a long time with out back pressure. Thanks
  • obyoneobyone Posts: 8,054
    Besides having no power and struggling along all day long and causing unncessary wear on the motor and drivetrain I don't see any other problems.
  • I have a 2000 GMC Sierra 4.3L V-6 step-side single cab truck.

    I am planning on doing a tune-up on my truck and was wondering what all i should do? Its got 113K miles.

    I also want to try to beef up the engine a little. Maybe a cold air intake, headers, and exhaust. Any suggestions on what kind of exhaust will get me loudest sound but stay legal?

    Also what else could I get to suck some more power out of that v-6?
  • obyoneobyone Posts: 8,054
    I suggest that you save your money. A cat back will give you better sounds, then again don't know how good a v6 will sound as it may not be to your liking. One thing for sure you won't get that big block sound that you're probably looking for.

    Headers and cold intake won't do much for you either I'm afraid. However, gears might.

    Sorry if this post isn't what you want to hear.

    As far as tuneup replacing the plug and wires is about all it takes in that department.
  • Can you tell me a little more about gears and a supercharger?
  • obyoneobyone Posts: 8,054

    Essentially you might consider changing the whole rear end. The RPO code in your glovebox will tell you what rear you have whether it be 3.23 3.73 or 4.11. An upgrade to a 4.11 will give you better acceleration off the line while costing you a little more in gas mileage.

    I wouldn't recommend a supercharger as the added compression of the forced induction could wreck havoc on a truck with over 100K miles.

    The rearend swap might be the most cost effective solution as I'm sure the junkyards have a huge amount of GM rears in their yards.

    Check here for rpo codes.
  • I recently bought a new 07 2500HD 4x4 crew cab, and was interested to see if anyone here has installed any kind of lift kit on a like truck. I was thinking of a 4" lift on the front only so it is more level with the rear. I would appreciate any thoughts or experiences anyone has had on the matter.

  • I have two questions about naviagation systems in a 2008 GMC Sierra 1500 SLT Crew cab (WITHOUT rear seating entertainment . I would like to get the 2008 GMC stock navigation system in my new 2008 GMC Sierra SLT crewcab truck.
    From GMC they cost around $2,700, but I found the actual nav systems cheaper ($1,400) on 3rd party GMC sites, and even found one for $900 on Ebay . On the 3rd party site & Ebay Its the exact 2008 gmc nav system (part numbers match).
    I asked the GMC dealership if I purchased it from a GMC 3rd party, would they install it. They told me no and that I have to buy it from GMC directly.
    And they also went on to say that there is an antenna (??) that has to be installed also, and that the nav system has to be programmed TO the truck (???)...I'm thinking this was a b.s. line to discourage me from buying it cheaper somwhere else.
    Is this true?? Its there big programming process in installing a gmc nav system that ONLY GMC can perform when installing into a new gmc truck?!?!?! am i missing something here?? Is there something else invloved OUTSIDE of simply replacing the existing radio with a new nav system?!?!? Does the back up camera need to be installed also??Can anyone enlighten me here?

    Also, pertaining to the gmc stock nav, can you change the view of the screen to show 3/4 view?? So far all ive seen of them is an overview shot, like looking at an actual map? The kind of hand held nav's u plug into the truck lighter, you can show a view at a 3/4 view shot like the view you have driving down the street. Can the GMC nav systems do this?!?! Or are you limited to JUST the over head shot?

    Thanks for your time to read this, and any help will be greatly appreciated.

  • I don't think it's a lift kit you need to worry about unless you want your truck to look bad [non-permissible content removed], if it's just the front end you want raised just take it to the dealer and have them adjust the torsion bar underneath and that will raise your front end for your desired ride height.
  • obyoneobyone Posts: 8,054
    So what your dealership is saying is that you need to buy the nav from GMC directly or actually any GM dealership and they will do the install?

    There is a security system that is tied into the radio and I would believe that the ECU would probably have to be reprogrammed so that the truck knows the stock unit was replaced with the nav unit. Course depending on your relationship with the service manager it could be a minor charge to do the reprogramming.

    Check out this site. They do charge a little high for the shipping buy their prices are very resaonable compared to my local Chevy and GMC dealerships sometimes saving me almost 50% on parts. Just enter the GM part number and it will return the description and price. If you buy the part from them your dealership should have no issues installing it.
  • Thanks for the input Shady. That sounds a lot better than messing around with the lift kits. I wasn't aware they could make those kinds of adjustments.
  • Just so you all know if the dealer installs a lift kit before you buy the new vehicle, it voids the warranty through GM. This is just something that the dealer forgets to tell you if you have trouble with it. The dealer is making approximately $6500.00 profit by putting it on and then they don't want to fix anything on it. They shouldn't be able to put them on vehicles without having them re-inspected for safety.
  • adjustments to raise front is fairly simple. look for long rods with octagon shape ends under bottom inside of tires(lower a arms i think). tighten bolts , paying attention to ammount of turns. keep turns equal to each side. headlights will be higher and piss me off if we crisscross at night so please dial them down after adjusting front up, thanks
  • I'm looking for a little more power for pulling my 5th wheel camper. I have an '04 silverado 2500HD gasser with 410 gears. I've added a K & N cold air intake and two flowmaster 40 series mufflers with no tailpipes. Mufflers are 2 1/2 in & out with narrowings at each end cut closer to match 3 inch pipes. Is a flowmaster 2 1/2 mufflers insides differant than that of 3 inch mufflers? Will tailpipes gain me more torque? Should I have purchased the HD muffler? Will an almost $300 chip help that much? If so what brand?
    Truck does pull fairly well in 55 zones. Pulling in 70 zones is quite a bit tougher, especially in windy conditions with hills. Any suggestions will be greatly appreciated ! thanks.
  • obyoneobyone Posts: 8,054
    Forget the K&N and the flowmasters. Other than intake and exhaust sounds you will lose low end torque. A westerns tune may help. Do a google on it. Other than that most bolt ons are not worth the price in return on $ per HP.
  • Thanks for the info and the reminder on the lights. Hadn't thought about those yet. Those dealers charging 6,500. on the lift kits are making way too much money on them. You can get a 12" lift installed at a off road shop around here for about 3,500., inlcuding everything else that needs to be changed out to work with it.
  • Alright truth is that the dealership you talked to is correct. There is an external antenna that needs to be installed as with any gps product. Also you do have to have the radio programmed in order to unlock it. The new radios built by denso have a data recognition of the VIN number stored in the radio and it will have to be programmed to work with the vehicle also the steering wheel controls have to programmed in order to function. The antenna for the gps is on the roof of the vehicle either painted to match or rough plastic. Vehicles with gps will have two of these on the new body style. One is the on-star/gps ant. the other is the xm ant. if so equipped. Now the only question here is, are the part numbers different between a vehicle with nav and without nav since on-star and nav are in the same ant. This I do not know. Where is the connection for the gps to hook in? I think you will have to pull the headliner most of the way down and replace the ant. for one with on-star and navigation.
    Never really looked into this too much but I know alot about the new radio from the fact that I work at a customs shop and deal with hooking alot of things up to those new radios.
  • I work at a customs shop and have installed a lift kit on just such a truck. It was a 6" fabtech lift. The truck looked absolutely awesome afterwards. I saw a few other posts on here about cranking the tortion bars and this is a solution to level the truck out it will not lift the rear. Also cranking the tortion bars up can also cause a rough riding truck. A lift kit replaces crossmembers and drops the lower control arms. Also the rear end will get blocks that space between the rear end and the leaf springs. This raises the whole truck and levels it out. A six inch lift on this truck with the right rims and tires becomes a monster. I literally have to jump to get into the truck. hope this helps.
  • Does anyone make a set of nice looking molded splash guards for the '07 NBS Silverado? And not those flat, el cheapo swapmeet one-size-fits-all junk neither. That's one of the few gripes I have about my truck.

    Part # and source appreciated.


  • The best thing I have found is made by a company called husyliners. They make molded floor mats and molded mud flaps specific to the vehicle. They even make different ones that fit wether it be a dualie, have fender flares or whatever. Very tough and always easy to install. They typically use the factory hardware when possible and add a few extra screws for support. They run about 50-60 dollars per set and are available at most customs shops.
Sign In or Register to comment.