Reply
 
Thread Tools Search this Thread Display Modes
 
Old 02-03-2011, 04:25 PM   #1
3 Rivet Member
 
Join Date: May 2003
Posts: 178
Question ANY 2500 Suburban 454/7.4 owners here??

I'm looking at buying a a 1999 Chevy 2500-4x2- with the 7.4 engine... ANyone have a 4x2 with a 454 in it? What gas mileage are you guys getting?
__________________

__________________
1966 Airstream SAFARI- FOR SALE in the classifieds
Chitown AirStreamers is offline   Reply With Quote
Old 02-03-2011, 04:32 PM   #2
Wise Elder
 
Jammer's Avatar
 
2010 30' Classic
Vintage Kin Owner
South of the river , Minnesota
Join Date: Dec 2009
Posts: 4,119
I get 8 towing, 12-13 otherwise, with my 8.1 engine. I understand the gas mileage is about the same with the 7.4. Most people find that 4wd is, if not necessary, at least important for pulling a larger trailer, because even on a flat site, you can get stuck from something as minor as dew on the grass.
__________________

__________________
Jammer is offline   Reply With Quote
Old 02-03-2011, 07:51 PM   #3
3 Rivet Member
 
Join Date: May 2003
Posts: 178
Anyone have a 4x2? Does it get a little better mileage?
__________________
1966 Airstream SAFARI- FOR SALE in the classifieds
Chitown AirStreamers is offline   Reply With Quote
Old 02-03-2011, 08:58 PM   #4
Rivet Master
 
easyride's Avatar
 
1977 27' Overlander
1973 27' Overlander
1963 19' Globetrotter
Naples , Florida
Join Date: Nov 2007
Posts: 1,259
Images: 1
No not really,I got about 8 towing when I had 1 a 4x2,now I have a 6. 4x4 and get a whopping 12 towing. Dave
__________________
easyride is offline   Reply With Quote
Old 02-03-2011, 09:17 PM   #5
Moderator Emeritus
 
overlander64's Avatar
 
1964 26' Overlander
1978 Argosy Minuet 6.0 Metre
Anna , Illinois
Join Date: Sep 2002
Posts: 5,396
Images: 183
Send a message via Yahoo to overlander64
ANY 2500 Suburban 454/7.4 owners here??

Greetings Chitown AirStreamers!

Quote:
Originally Posted by Chitown AirStreamers View Post
I'm looking at buying a a 1999 Chevy 2500-4x2- with the 7.4 engine... ANyone have a 4x2 with a 454 in it? What gas mileage are you guys getting?

IMHO, you are looking at one of the best Suburbans. The two-wheel drive is FAR preferable to the four-wheel-drive version that has what must be one of the most unreliable 4X4 setups around. The only problem that I have had with my '99 K2500 Suburban is with the four-wheel-drive transfer case. At approximate 15,000 mile intervals, it requires a new control module that has a list price of $750.

The VORTEC 7.4 Liter is a towing machine. With 4.10 differentials, I average 10 to 12 MPG towing my Overlander - - or between 12 and 14 MPG solo. At 196,000 miles plus, the only recurring problem with my Suburban has been the transfer case. The two-wheel drive version will certainly save you MANY dollars in repairs -- and should be a little more economical than that 4X4 version. I honestly don't know what all of the "hand wringing" is over 4X4 as my four-wheel-drive has never worked properly, yet in 196,000 + miles of use I have never been stuck or had to be towed when Airstreaming.

Good luck with your investigation!

Kevin

P.S.: I am keeping my K2500 Suburban, but will be spending $4,000 on converting it back to two-wheel drive rather than spending $3,000 on a remanufactured transfer case and $750 on another control module that would be destined to fail in 15,000 miles.
__________________
Kevin D. Allen
WBCCI (Lifetime Member)/VAC/Free Wheelers #6359
AIR #827
1964 Overlander International/1999 GMC K2500 Suburban (7400 VORTEC/4.11 Differentials)
1978 Argosy Minuet 6.0 Metre/1975 Cadillac Eldorado Convertible (8.2 Liter V8/2.70 Final Drive)
overlander64 is offline   Reply With Quote
Old 02-03-2011, 09:34 PM   #6
TahoeStream'n
 
subfan1's Avatar
 
2012 20' Flying Cloud
La Habra , California
Join Date: Jul 2007
Posts: 832
Images: 3
We had a 98 GMC Suburban with the 7.4l and 3:73 gears. It got 8 to 9 MPG while towing or city driving. The best I got on the highway solo was 15.
The problem I had with mine were the brakes. Pulled to one side or another. And lots of maintenance work. I had to get rid of it after 11 years. I just didn't want to put any more money into it. Yes I was the original owner.
__________________
subfan1 is offline   Reply With Quote
Old 02-03-2011, 09:35 PM   #7
4 Rivet Member
 
tlavergne's Avatar
 
1978 28' Ambassador
Kenton , Ohio
Join Date: Mar 2002
Posts: 457
I have the same truck in 4 wheel drive and 120,000 miles. I have never had the problem with 4 wheel drive that Kevin has had (knock on wood). I use my 4 wheel drive often so I have no choice...I need it. But, I am replacing my transfer case on Friday...my fault for failing to see a leaking transfer case seal (re-manned Jasper...$2000 installed). I get 10 mpg whether I tow or not. I have been going back and forth with getting rid of mine or investing some cash into it and keeping it another 10 years. I have decided to keep it and put up with the gas mileage because, as Kevin said, it is a great towing machine. That said, I have had problems. I had to replace the rocker arms at 70,000 miles due to one breaking...$1300. I had to replace the front axle about the same time due to a bearing failure in the differential...$1300. This happened right after I bought the truck. Anytime you get something this old and used you just never know. All that said it tows like a dream and you can hit the mountains and stay at speed. I run Michelin LTX tires and have 70,000 miles on them and still going strong. The options for me was keep this great truck running and expect to put some $ in it now and again, or buy a new one for $40,000. I'm keeping it.
Tom
__________________
"Without music to decorate it, time is just a bunch of boring production deadlines or dates by which bills must be paid." -- Frank Zappa
tlavergne is offline   Reply With Quote
Old 02-03-2011, 09:37 PM   #8
4 Rivet Member
 
tlavergne's Avatar
 
1978 28' Ambassador
Kenton , Ohio
Join Date: Mar 2002
Posts: 457
As an aside, I use mine mostly for towing and runs to the lumber yard. It is not a drive everyday vehicle for me.
__________________
"Without music to decorate it, time is just a bunch of boring production deadlines or dates by which bills must be paid." -- Frank Zappa
tlavergne is offline   Reply With Quote
Old 02-03-2011, 10:55 PM   #9
2 Rivet Member
 
PLDodd's Avatar
 
1975 Argosy 26
Portsmouth , Virginia
Join Date: Aug 2009
Posts: 29
Images: 7
Blog Entries: 1
My Truck is a 99 also. 7.4 4wd with 4.10 gears. 4wd has never failed me yet (189k miles) and I use it alot! I get 8 mpg towing @ average 0f 75 mph. I'm currently running nitto duragrappler 285/75r16 e rated, at 90 psi only when towing, 50 psi not towing. (great tires) Bought a programmer some time back, set the rev limiter higher, adjusted the shift points and pressures. Truck runs tight! I've looked at a few new dmax's but just cant stand the thought of even 25k for a used pickup (no burbs yet with dmax) I'm going for 500k. Truck still looks good and runs good. I think it might be in one of my pics...check it out
__________________

__________________
PLDodd is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
1500 or 2500 HD? alp6783 Tow Vehicles 39 02-18-2011 11:25 AM
1999 3/4 Ton Suburban and Expensive Repairs tlavergne Tow Vehicles 29 01-31-2011 03:19 PM
Suburban Furnace Selection MDSilverado Furnaces, Heaters, Fireplaces & Air Conditioning 3 01-31-2011 10:40 AM
Owners manual Flaboy67 1970 - 1973 Sovereign 4 01-09-2011 07:18 PM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 03:44 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.