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Old 04-12-2015, 10:21 AM   #1 (permalink)
Bluebeard
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I'm a proud new owner of a '08 LMM

This will be my first diesel truck as I have had gassers all my life. The truck is bone stock and has 72k on it. I don't plan on doing a lot of towing and may use it mainly to take a weekly 150 mile trip to my mining claim in the CA foothills.

Question: When driving vs towing, is there anything a person should know to help the engine perform better? In other words, do I drive it like I drove my gasser? With all the tow mode and tranny choices in my new truck, I get it that going downhill, there probably isn't any reason to use my brakes, when I can keep downshifting, right?

So if anyone can impart any driving advice, I would be much appreciative.

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Old 04-12-2015, 11:43 AM   #2 (permalink)
BrennanK
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When driving without a trailer, put it in drive and let her rip.

When towing a decent load, 6,000+ lbs, you can use tow haul mode. Then you just drive it. These trucks are so well composed you really don't have to "drive it". They will take care of themselves for the most part. If you are towing heavier and find the truck shifting in and out of O/D you can lock the truck into a lower gear so it stops hunting for a gear.

I haven't ever had to use O/D lock out yet, but I don't pull a lot of hills. So in general, tow haul mode and go.


Welcome to Diesel Place and enjoy the new truck. Towing will never be the same again!

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2005 Black GMC Sierra 2500HD SLT - CCSB
Installed:
AUX Radio Input (iSimple ISGM535) - High Idle Mod - Head Gaskets (June [email protected]) - OEM Cab Lights - LBZ Mouth Piece - All On Headlight Mod - Puddle and Footwell LED's - OEM Towing Mirrors - Uniden BCT15x Scanner - Gauges in Trippin' Overhead mount - Rigid Industries Dually Backup Lights - UC6 radio with LUX amp
-Stock tuning and staying that way

Future:
LBZ door badges, Kennedy lift pump, aux CAT filter
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Old 04-12-2015, 11:49 AM   #3 (permalink)
Bluebeard
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I see a lot of guys putting exhaust gas and turbo boost gauges in the truck. Is that something I need to monitor? When pulling a long steep mountain pass, do I need to be monitoring that stuff? Or is just watching the water temp enough? What does the engine temps normally run at, and if it starts overheating, do I need to pull over, drop it into a lower gear and slow down, or what? I am towing a Arctic Fox 24-5n 5th, so it appears I won't be over-stressing it too much- not like a lot of the guys who are pulling much bigger trailers.
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Old 04-12-2015, 01:29 PM   #4 (permalink)
rdminter
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The minimum you need is an egt guage. I always drive by this when towing. My engine
temps dont change too much unless I am towing steep grades in hot weather. I watch
my egt's and down shift and slow down when necessary to keep them under 1250degs.
I really like to keep it under 1200degs but it can go a little higher. Boost guage is nice to have, but not really necessary.
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Prodigy wireless brake controller. Iridium Sat phone, pcv reroute, boost guage.
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Old 04-12-2015, 01:32 PM   #5 (permalink)
BrennanK
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If your truck is stock you don't have to monitor much of anything. It will take care of itself. That's the beauty of the Duramax, it is very much a set it and forget it towing machine.

Your truck should run about 210* on the factory dashboard gauge. You will hear your clutch fan engage if the truck starts to run warm. If the temp continues to rise while the fan is engaged you can downshift a gear and slow down until the temps come back.
Unless you are running really fast up hills and in the middle of a crazy hot day you will likely never have a problem.
__________________
2005 Black GMC Sierra 2500HD SLT - CCSB
Installed:
AUX Radio Input (iSimple ISGM535) - High Idle Mod - Head Gaskets (June [email protected]) - OEM Cab Lights - LBZ Mouth Piece - All On Headlight Mod - Puddle and Footwell LED's - OEM Towing Mirrors - Uniden BCT15x Scanner - Gauges in Trippin' Overhead mount - Rigid Industries Dually Backup Lights - UC6 radio with LUX amp
-Stock tuning and staying that way

Future:
LBZ door badges, Kennedy lift pump, aux CAT filter
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Old 04-12-2015, 03:27 PM   #6 (permalink)
Bluebeard
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I assume they don't make a Stereo/nav unit that also has inputs for temp sensors? With everything being digital these days, it would be nice to have the nav screen showing the EGT's, Boost or any other thing you feel like monitoring. 99% of the time I won't be towing, so I don't need to be staring at gauges that aren't helping me drive; but in the occasional instance that I would like to be monitoring them, it would be nice to be able to bring them up on a nav screen and choose which gauges I want to monitor. Does anyone make a Stereo/nav/smartphone compatible/xm/ optional gauge/ multiple camera unit I can install on my truck? It would be so cool
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Old 04-12-2015, 04:21 PM   #7 (permalink)
BrennanK
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Check out the Torque App for Android. You get a cheap Bluetooth OBDII dongle and you can connect to it with your phone. It will show you lots of good data. I am not 100% sure, as I don't own a LMM, but your truck might already have boost and EGT sensors you can view with that app.

It's a pretty slick tool and it is under 20-30 bucks.
__________________
2005 Black GMC Sierra 2500HD SLT - CCSB
Installed:
AUX Radio Input (iSimple ISGM535) - High Idle Mod - Head Gaskets (June [email protected]) - OEM Cab Lights - LBZ Mouth Piece - All On Headlight Mod - Puddle and Footwell LED's - OEM Towing Mirrors - Uniden BCT15x Scanner - Gauges in Trippin' Overhead mount - Rigid Industries Dually Backup Lights - UC6 radio with LUX amp
-Stock tuning and staying that way

Future:
LBZ door badges, Kennedy lift pump, aux CAT filter
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Old 07-27-2015, 08:31 PM   #8 (permalink)
wyoscout
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Hey Bluebeard - we are almost brothers. I have just purchased a similar truck. My recent towing experience matches the comments above. Don't attack the hills to hard and the truck will take care of itself.
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