Chevrolet Suburban 3500 Questions

[Bigburb3500]

Sorry man that sucks. Appreciate you being the front runner and guinea pig so to speak. I wonder if that's why the aftermarket (like my link above) ones use flex tube.

Could be? The issue is the 6.0 is just a LITTLE too big around the backside. Who ever thought that would be an issue?

Now I have to figure out what to do with the dipstick and tube… well, guess it will be in the back corner of the garage till my child is cleaning out the house in 60yrs

 

[Geotrash]

Pulled the camper out to Elkton, VA for the weekend and dropped it off at our camping spot, then Saturday morning had to drive back to Richmond for our daughter's volleyball tournament. Then out to Luray for our good friends' grand opening on their new wedding venue Saturday afternoon. Then back to Elkton to spend the night, and finally pulled the camper back home on Sunday afternoon. About 8 hours behind the wheel, all in.

Pulling the camper, we took route 33 crossing the Skyline Drive, as we often do. Outside temp was was 87º for the climb on the outbound leg, and the transmission topped out around 190 while the engine coolant temp gauge never moved. Last time I pulled the camper with our 2012 Yukon XL Denali over that route in similar temps, I saw 235 on the transmission and 230 or so on the coolant, so the Suburban 3500 runs significantly cooler when towing.

The other good news is I finally got some unloaded highway miles on with the new wheels and tires and registered 17.9 on average from Charlottesville, to Richmond, driving at 70 mph on I-64. It was a calm wind day so that effect should be negligible. But I got 17.7 on the way back out to Charlottesville, probably owing to the fact that it's slightly uphill westbound vs eastbound as the route climbs up toward the Piedmont of the Blue Ridge.

The bummer was that my wife started to get tired of the rough ride of the 3500 on our way home Sunday, so I may need to look into Suburban 2500 springs and torsion bars soon.

Unloaded mpg after 50 miles on the highway at 70 mph:

 

[Bigburb3500]

Pulled the camper out to Elkton, VA for the weekend and dropped it off at our camping spot, then Saturday morning had to drive back to Richmond for our daughter's volleyball tournament. Then out to Luray for our good friends' grand opening on their new wedding venue Saturday afternoon. Then back to Elkton to spend the night, and finally pulled the camper back home on Sunday afternoon. About 8 hours behind the wheel, all in.

Pulling the camper, we took route 33 crossing the Skyline Drive, as we often do. Outside temp was was 87º for the climb on the outbound leg, and the transmission topped out around 190 while the engine coolant temp gauge never moved. Last time I pulled the camper with our 2012 Yukon XL Denali over that route in similar temps, I saw 235 on the transmission and 230 or so on the coolant, so the Suburban 3500 runs significantly cooler when towing.

The other good news is I finally got some unloaded highway miles on with the new wheels and tires and registered 17.9 on average from Charlottesville, to Richmond, driving at 70 mph on I-64. It was a calm wind day so that effect should be negligible. But I got 17.7 on the way back out to Charlottesville, probably owing to the fact that it's slightly uphill westbound vs eastbound as the route climbs up toward the Piedmont of the Blue Ridge.

The bummer was that my wife started to get tired of the rough ride of the 3500 on our way hoe Sunday, so I may need to look into Suburban 2500 springs and torsion bars soon.

Unloaded mpg after 50 miles on the highway at 70 mph:
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Wow! That awesome! I usually see around 15… maybe 16 if I’m lucky. My trans temp is hovering around 170ish during normal driving but since replacing the fluid and driving 100 miles at 80mph with ambient temp 85° it stabilizes at 165°

 

[Geotrash]

Wow! That awesome! I usually see around 15… maybe 16 if I’m lucky. My trans temp is hovering around 170ish during normal driving but since replacing the fluid and driving 100 miles at 80mph with ambient temp 85° it stabilizes at 165°

That’s about what I see for transmission temperature as well, when I’m not towing. Perfect.

 

[TripleFJeff]

On a road trip in my '08 2500 from Philadelphia area to Seattle, WA (then back). Caught a pair of armored 3500's in the wild. Just off I90 in Blue Earth, MN. My white 2500 with the photobomb on the left...

 

[Marky Dissod]

On a road trip in my '08 2500 from Philadelphia area to Seattle, WA (then back). Caught a pair of armored 3500s in the wild just off I90 in Blue Earth, MN.
My white 2500 with the photobomb on the left...View attachment 459360View attachment 459361

By now I'm sure it's been noticed that the GMT900-1500 mirror housings are being used by the GMTK2YC 3500.

 

[Geotrash]

By now I'm sure it's been noticed that the GMT900-1500 mirror housings are being used by the GMTK2YC 3500.

Yes. And the factory pax side mirror glass is flat instead of convex, so I had to buy a replacement glass from Amazon to correct that issue. But the good news is the snap on tow mirrors from my 2012 Yukon XL fit perfectly.