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Old 06-30-2010, 11:40 AM   #15
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Originally Posted by bwaysteve View Post
Does anyone know what year they went to the L480e trans?
It's not year, it's model. The 1500s got the 4L60e, and the 2500s got the 4L80e.
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Old 06-30-2010, 12:17 PM   #16
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It's not year, it's model. The 1500s got the 4L60e, and the 2500s got the 4L80e.
That's what I thought.From all the input it sounds like the best way to go is for a Burb is a 2500 with the big block from 91 on.Thanks
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Old 06-30-2010, 02:16 PM   #17
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I have two Burbans. Both 1500's w 5.7 motors.
One is an 89 4x4 and the other is a 2004 2wd.
I tow a 1970 27' Overlander with the 89 4x4.
I like the 89 because the 4x4 is more solid on the freeway and I like the option of 'not' getting stuck.
The 89 is fine on flat ground at 60-65 mph, over the mountain passes, I just put on the 4 way blinkers and cruise at about 35 mph, with the semi trucks.
No problem....
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Old 06-30-2010, 03:29 PM   #18
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Originally Posted by howco View Post
I have two Burbans. Both 1500's w 5.7 motors.
One is an 89 4x4 and the other is a 2004 2wd.
I tow a 1970 27' Overlander with the 89 4x4.
I like the 89 because the 4x4 is more solid on the freeway and I like the option of 'not' getting stuck.
The 89 is fine on flat ground at 60-65 mph, over the mountain passes, I just put on the 4 way blinkers and cruise at about 35 mph, with the semi trucks.
No problem....
Howco,I am probably at about the same weight or close to your OverlanderDo you know final gear ratio on the 4x4?What MPG is average on the 89 4x4 traveling non mountainous terrain?My 1500 has the 5.7 and is a great engine.
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Old 06-30-2010, 08:03 PM   #19
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Originally Posted by bwaysteve View Post
So basically I could go with the 1500 rather than the 2500 with the 454 and still be good?
I just don't want to be slapped all over the highway in a truck too light.I could go either way at this point but looking for best options between milage and stability.
Your intended use can make a huge difference in your satisfaction level with the less powerful C/K 1500 5.7 Liter compared to a C/K 2500 7.4 Liter Suburban. I traded my 1995 K 1500 Chevrolet Z71 with 5.7 Liter on my K 2500 Suburban in April 1998 (1999 model year Suburban). The 5.7 liter was grossly underpowered for my travels in the Rocky Mountains with my '64 Overlander (4,440 pounds dry/5,900 pounds loaded for vacation), and was my sole reason for trading the K1500 truck in 1998 as it only had 48,000 miles.

The 1999 K2500 Suburban is still in my garage and serves as my primary long-distance tow vehicle with 199,990 miles on the odometer. The transmission is original and has received only regular transmission service at 30,000 miles intervals. The motor has required only a timing gear and chain set at 180,000 +/- miles, and oil pan and main bearing seals at 185,000 +/-miles. The only issue I have with my K2500 Suburban is its electronic transfer case - - the circuit board that controls all operations of the transfer case tends to fail every 15,000 miles and at $750 for the part and the labor to install it has made the four-wheel-drive an expensive option that I will not purchase on my next tow vehicle - - a locking rear differential is just as effective but less costly to maintain. Currently, I am waiting for my mechanic to make a cost comparison to complete the transfer case repair again compared to the cost of converting back to 2WD.

Good luck with your investigation!

Kevin

P.S.: The Suburban actually averages close to 2 MPG better when towing than the less powerful K1500 did, and solo the difference is only readily apparent in town (the Suburban looses 3 MPG to the 5.7 Liter 1500).

-- K1500 -- solo 18 MPG Highway -- 9 MPG Towing -- 3.73 differential gearing

-- K2500 -- solo 17 MPG Highway -- 12 MPG Towing -- 4.10 differential gearing
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Old 06-30-2010, 09:32 PM   #20
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Kevin,
Great info!!! This really helps compare the two.The 2500 seems to be a great truck,but everyone has problems with something different on each vehicle so it's not just one one bad flaw inherent to all.
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Old 07-01-2010, 02:03 AM   #21
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bwaysteve
My overlander is a 27' and weighs in around 4400lbs.
Final ratio is about 4:11
I honestly have never checked the mpg while towing, as I personally don't give a rip. In my way of thinking, it's much cheaper than hotels and it's such great therapy for my Wife and I, that it matters little to me.
Not towing, the 2004 2wd gets around 21 on the flat and the 4x4 gets around 17 on the flat ,both at freeway speed.
Hope this helps....
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Old 07-05-2010, 01:05 PM   #22
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the 10 bolt that came under the burbans was too light, if you get one you will want to get a 14b semi floater out of a ld 2500 and put it in, it will do a lot better than the 10 bolt.
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Old 07-05-2010, 02:16 PM   #23
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I tow a '72 Overlander with my '99 burb 2500 4x4, and consistently get right around 12 0r 13 mpg doing so, here in the west. As stated here, the 5.7 engine is a little weak but with the 4:10 gears it does ok on the mountain passes. It cruises right along on the level interstates, with virtually NO trailer shimmy when a semi passes. I use a standard weight-distribution hitch, and usually don't bother with the anti-sway device. The burb is a very steady tow vehicle, a good choice for trailers 27' or longer. Good luck! -tim
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