tahitiansoul
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- May 29, 2017
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- 43
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- TAHITI
- First Name
- Marc
- Truck Year
- 1981
- Truck Model
- JIMMY SIERRA CLASSIC
- Engine Size
- 5.3 LM7
Supercharge it
Pulling Sucks--2001 Suburban 3/4 ton--6.0
- Thread starter OldBlueDually
- Start date
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- Joined
- Sep 1, 2018
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- Location
- Washington State
- First Name
- Craig
- Truck Year
- 1973 (have two), 1985
- Truck Model
- K10, K20, C20
- Engine Size
- 350, 454, 6.2 Detroit
We have a 21.5 Grand Imagine, pulled with our 2018 GMC 6.2. Mileage is consistent 9, pulls good. The 6.0 is an awesome engine. Have it tuned, (I use HP tuners). Small cam, (230 @ .05) around .600 life, 107-110 LSA. I also love the 454, tows anything.
Bextreme04
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- Eric
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- 1980
- Truck Model
- K25
- Engine Size
- 350-4bbl
I just finished assembling the 6.2 for our 2011 Suburban. It currently has the 5.3 and we pull a 6400lb Keystone Crossfire. I get about 6-8mpg currently and the 5.3 is generally just not happy(but I'm also getting garbage mileage unloaded so it's likely just a tired engine issue). I got the L9H 6.2 used and just pulled it apart and refreshed the heads and had it all cleaned up and inspected. New cam bearing, quick deglaze hone on the cylinders since they were still in-spec, and then reassembled with new bearings and rings. The only change from stock is a TSP stage 1 VVT cam which is 216/229 @.050, .600" lift, and 114 LSA and 107 ICL. It's got the limiter in the VVT gear to manually restrict the cam retard to ~30 degrees, and I'll have to do quite a bit more tuning with it being a VVT cam, but it should help produce a bunch more low end torque while still bumping the peak HP up over 500 at the crank @~6500RPM. Should be way better for towing all the way around. The 5.3 is only rated for 320hp@5500rpm and about the same torque stock.
Keith Seymore
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- Keith Seymore
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Definitely something is wrong.
I've pulled my Haulmark enclosed (24 ft, approx 7500 lbs) all over the US, often with 1/2 ton GMT800 utilities with no issues.
K
I've pulled my Haulmark enclosed (24 ft, approx 7500 lbs) all over the US, often with 1/2 ton GMT800 utilities with no issues.
K
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GTX63
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- Ty
- Truck Year
- 1985
- Truck Model
- K10
- Engine Size
- 350
Late posting to this thread, but I have some experience related to the OPs set up.
I have pulled RVs and equipment trailers up to and maybe past my tow rating on my current truck for 10 years. 6.0 with 4.10s. Living in Tn, I've been on steep grades, winds, heavy traffic more often than not. A dog would not be an accurate description of the drivetrain I have.
Yes, an exhaust restriction is the first thing I would look for. A 6.0 did not come from the factory unable to pull a camper thru a headwind on flat ground, and an aftermarket tune should not be considered a fix for the present underlying problem. I'd also tear down and inspect the camper brakes/bearing/spindles. Or hook up to something else and see if there is a difference pulling.
Trying to push exhaust thru a restriction makes everything work harder. Pulling an RV that is fighting back and making you drag it will cause the engine and tranny to run hot.
I have pulled RVs and equipment trailers up to and maybe past my tow rating on my current truck for 10 years. 6.0 with 4.10s. Living in Tn, I've been on steep grades, winds, heavy traffic more often than not. A dog would not be an accurate description of the drivetrain I have.
Yes, an exhaust restriction is the first thing I would look for. A 6.0 did not come from the factory unable to pull a camper thru a headwind on flat ground, and an aftermarket tune should not be considered a fix for the present underlying problem. I'd also tear down and inspect the camper brakes/bearing/spindles. Or hook up to something else and see if there is a difference pulling.
Trying to push exhaust thru a restriction makes everything work harder. Pulling an RV that is fighting back and making you drag it will cause the engine and tranny to run hot.
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