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Thank you so much. Also, if you know where to find any research info about this, it would be good.
265/75/r16 or 285/75/r16 on a 3/4 ton i plan on buying very soon (now if i can get some info).
Does anyone know if the computer can be calibrated to these tire sizes. The chevy dealer says no but the gmc dealer say, i don't know.
also, if i put on oversized tires, how will it effect the abs etc...
I don't know any other way to get the differential raised as i often hit bolders in the field. A lift kit, which i'll be putting on, won't do the trick.
Steve
Host
Vans, SUVs and Aftermarket & Accessories Message Boards
Anyone who is having the same problems; PLEASE voice their feelings to GM and maybe with enough negative feedback they will fix our trucks.
Where can we go to voice our opinion?
Ready to order today. Debating on this issue. 6.0 will probably suffice, but I'd like the 8.1.
I have about 4,000 miles on my YXL 8.1 with 4.1 axle. I drive in the suburbs (lots of 40 mph roads with some stoplights, freeways too, not much city' driving).
I am getting between 12 and 13 mpg. The 8.1 is so much fun to drive that I rarely accelerate slowly. So it is quite possible that a person could improve on these numbers.
Here is my mileage findings...
ENGINE -- ODOMETER -- -- -- AVERAGE
HOURS -- MILES -- M.P.G. -- M.P.H.
3.2 -- 4 -- 0.10 -- 1.3
11.8 -- 250 -- 9.70 -- 28.6
15.7 -- 354 -- 13.26 -- 26.7
20.0 -- 552 -- 15.07 -- 46.0
27.4 -- 819 -- 11.83 -- 36.1
31.6 -- 919 -- 9.59 -- 23.8
38.1 -- 1061 -- 10.09 -- 21.8
42.6 -- 1313 -- 13.57 -- 56.0
46.1 -- 1462 -- 12.70 -- 42.6
50.9 -- 1724 -- 12.71 -- 54.6
58.9 -- 1934 -- 10.45 -- 26.3
67.2 -- 2208 -- 11.60 -- 33.0
10.89 33.06 <---average
sorry that the table isn't straight... I tried.. so you'll have to look bewteen the dashes.
Also.. someone posted a message asking if they could tow a 9000# boat with the stock platform hitch. The correct answer is no.
Boats use surge brakes, and that eliminates being able to use a weight distributing hitch.
The stock hitch can tow 5,000 lbs, with a 500 lb. tongue weight.
To tow heavier, you need to upgrade.
Putnam makes a hitch that works up to 10000 lbs/1000 tongue weight.
check out hitch-web.com
Reese makes a Titan hitch, but they've had problems with it not fitting.. and right now it's a redesign.
The 8.1 is a strong motor and I love it, but when starting cold, I can hear what sounds like lifter or valve noise. Takes a minute or two to go away. My 454 in my '96 never did anything like these two problems.
If anyone has had similar experience with their 8.1 3/4 ton Sub/YXL's please let me know.
to vending--my mileage has been averaging between 12.5 to 14 mpg.
Again I implore those interested to make their concerns heard by GM.
One other thing highly recommended by both the dealer and myself is a hood/bug guard. I got one painted to match the body, indigo blue. The painted one runs about $85, and a regular clear/smoke is usually around $45. It really doesn't do a whole bunch for bugs, but protects the hood from chips and dings. A friend decided it was BS and now after his 2nd winter he wishes he would have done it, the front of his hood is chipped and starting to rust. On his white truck it really stick out too.
I found this out because i got 285's on my 1500 Z71. Took it in they spent 25 min on the phone with tech assistance. I even talked to them. They said it cant be done. Bought a hypertech and reprogrammed myself
If you have the 2001 8.1L (or any other engine), you can use a Jet SCU2000 to correct the speedo. $130.
I have the SCU2000 on a 8.1L and it works OK.
Thanks much
Larry91
Steve
Host
Vans, SUVs and Aftermarket & Accessories Message Boards
I have a 2001 YXL and would appreciate your comments. Also, if you know of a good company, please let me know.
p.s. most apply using 3-M double sided tape, does this hold up?
Apparently the VIN`s are not the same for the year 2000 and the year 2001 Manuals. For what its worth here is the decode as far as I can go with the year 2000 Service Manual.
3 = Country of Origin = Mexico*****************
G = Manufacturer = General Motors************
N = Make ??????????? B = Chevrolet D = GMC******
G = GVWR/Brake System = 8001-9000/Hydraulic*******
K = Truck Line/Chassis Type = Conventional Cab/4x4
***************
2 = Series = 3/4 Ton***************
6 = Body Type ????? 4=Regular Cab 9=Extended***
************
U = Engine Type = 6.0 Liter Gas ( LQ4 )*****
**********
9 = Check Digit***************
5 = Model Year ???? = Y=2000***************
Sorry that I can`t give you full info.
Irv.
G = Plant Location = Silano Mexico********
25 = The last or 12th thru 25th Digit = Plant
Sequence Number.
Thats all fokes.
Irv.
Now when I try to go to this site it asks for user name and password. Does anyone know how to register for this site?
Any comments on this would be appreciated.
Thanks for the decode Irv (Don's brother). The vehicle is a 2001 LT 2500 4x4 suburban, with 6.0 liter engine. It has autoride, 3.73 rear locker and towing package, rear captains seats, all the goodies except sunroof (to get the rear a/c controls).
Had a customer go from 245's to 285's on a 2500HD two weeks ago. Service Manager kinda give him a run around about changing the computer. I called & set up an appointment & everyone is happy - DONE. No big deal. If you would like more info email & I could find out more for you...
I have thought about upgrading to 265's from the 245 tires that came with the truck. Right now, I am towing in over drive and it will stay there even going over an overpass, if I nurse it a little. Will I lose this going to 265's?? I am runing at 2000/2100 RPM at 60 MPG towing in O-Drive. Passing can get up in the 4000/4500 range out of over drive. The over drive does not kick in till 55 mph in the tow haul position. If you change tires, did you stick with the 10 ply or go down to 8 ply or lower?? Much difference in the ride quality with the Michlens?? Except for the oil usage, I am happy with the new truck so far. I was hoping for better gas mileage. It has been as low as 6 or 7 MPG in just short local trips. I would like to go to larger tires to reduce the ratio, if my OD will still function close to the present level. Any feed back appreciated. Skipjack
I did check on the NHTSA site at http://www.nhtsa.dot.gov/cars/problems/ and they don't list that particulat TSB.. you might want to 'search their site with your make model year for any recalls/ TSB's
www.delphi.com/gmsuv
Some have installed the poron backup senors on the YXL
thanks
Fred