Locker VS Posi

NO - this is a great setup. I recommend maintaining a healthy set of tires though that score well on ice and snow.

I use both my Yukon and Tahoe with G80's to get around on frozen lakes here in MN (dedicated going on 7 years of it with these trucks). Last year I drove through at least 3 hazardous blizzards and 1 of which was from the tip of MN (lake of the woods) through blizzard conditions of 12+" snowfall for 6 hours down to the cities and still had blood in my knuckles. Let me know if you have any questions.

Splorg said:

Read the thread. I know nothing about rear end diffs. This is my first truck based vehicle.

I've just been told that I'm being "redeployed" by my company to a location about 30 miles from home. My job requires me to be on site, without fail, regardless of inclement weather, unless the government nannies tell us we can't drive and close the roads due to the snow. (Central Pennsylvania)

AFAIK, my Yukon has the stock "3.73 locking rear end". I'll be driving on road in inclement weather. Is this bad for this application? Should I be looking for a remote lock diff before winter?

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You can verify your setup by looking in the glove box for GT4 (3.73) & G80 (locker). This is good for your conditions, imo.

Those are RPO codes, right? My glovebox doesn't have a label can i find them elsewhere?

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Splorg said:

Those are RPO codes, right? My glovebox doesn't have a label can i find them elsewhere?

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Yes, RPO codes. No label!?!?!


If you contact GM via their customer website, you can give them your VIN and ask them to send you the build sheet. It will show all your RPOs.

Find attached the build sheet for Macho Grande kindly provided by GM Customer Care and Social Media folks. Interesting, if I read this right I have an alloy wheel on my spare, as well? Awesome!View attachment Build Sheet 2001 Yukon(1).PDF

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BeenChevy said:

NO - this is a great setup. I recommend maintaining a healthy set of tires though that score well on ice and snow.

I use both my Yukon and Tahoe with G80's to get around on frozen lakes here in MN (dedicated going on 7 years of it with these trucks). Last year I drove through at least 3 hazardous blizzards and 1 of which was from the tip of MN (lake of the woods) through blizzard conditions of 12+" snowfall for 6 hours down to the cities and still had blood in my knuckles. Let me know if you have any questions.

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Might I inquire as to what tires you use on your vehicle? I currently have Hankook Dynapro AT-M 265/75R16 on the stock wheels, which is 20 aspect over the 245/75R the vehicle came with.

For some more perspective, I do travel a great deal in my current position (which will change to a 60 mile daily commute to the same location in the very near future) and my previous work vehicle was a 2004 Chrysler Town and Country AWD on which I ran slightly larger than stock Cooper Discoverer HTs for winter traction and Hankook all seasons in summer. I'm happy to have a work buggy that seems quite a bit more capable in bad weather but I'm somewhat apprehensive about my lack of knowledge about how to drive it in say, snow; the Chrysler was brainless, you just drove it. This requires mode selection, has a completely different driveline arrangement and is a good deal more powerful than anything I've owned previously as a daily driver - the Subaru I owned before I bought the Chrysler new in 04 had 91 horsepower from the factory, and the previous owner had let the fence open, through which at least half of those horses had escaped. On a good day the Chrysler put out less than 200 at the crank. This is closer to 300, even after a quarter of a million miles.

In low traction situations my understanding is "Auto" is the way to go, if that doesn't get me out, "4 HI", and if I have to get into low range I shouldn't have gotten it in this mud hole in the first place

Any information, from tires to technique, is appreciated! I'm sure you get more filthy white stuff from the sky than we do here.

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Splorg said:

Find attached the build sheet for Macho Grande kindly provided by GM Customer Care and Social Media folks. Interesting, if I read this right I have an alloy wheel on my spare, as well? Awesome!View attachment 229077

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And there's your GT4 & G80.

What is D07 floor shift console?

HiHoeSilver said:

And there's your GT4 & G80.

What is D07 floor shift console?

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I couldn't tell you. I definitely don't have a console shifter, it's on the column - I do however have the full length floor console with the lousy cupholders and a front and a center storage bin with hinged lids, that kind of just continues down from the center stack. I'm curious myself.

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I also find interesting the fact that all of the GM vehicles I've seen that are equipped with a cassette player and CD player of this era have a cassette deck in the head unit and (in the case of the MT8XX) a CD player "module" in the center stack, much lower. Mine is the other way around, with a CD player in the (DIN and a half, grumble grumble) head unit and this odd little cassette deck in the spot in the bottom of the stack.

I pulled out the cassette player and cleaned it up, and it works - and it's one of the most advanced cassette decks I've ever seen as a factory option in a car. Full skip and search, blank slip, etc etc. Neat little unit.

Too bad I haven't owned a cassette since the late 1990s lol although the previous owner was kind enough to include "Hank Williams, Jr's Greatest Hits Volume 2" on tape for me

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Splorg said:

I also find interesting the fact that all of the GM vehicles I've seen that are equipped with a cassette player and CD player of this era have a cassette deck in the head unit and (in the case of the MT8XX) a CD player "module" in the center stack, much lower. Mine is the other way around, with a CD player in the (DIN and a half, grumble grumble) head unit and this odd little cassette deck in the spot in the bottom of the stack.

I pulled out the cassette player and cleaned it up, and it works - and it's one of the most advanced cassette decks I've ever seen as a factory option in a car. Full skip and search, blank slip, etc etc. Neat little unit.

Too bad I haven't owned a cassette since the late 1990s lol although the previous owner was kind enough to include "Hank Williams, Jr's Greatest Hits Volume 2" on tape for me

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My 2000 Z71 had a tape/CD all I'm the head unit. Used cassettes all the time. Made sure not to leave one behind.

Recently got a message from someone who bought a car at CarMax and found one of my Albums in the CD player. Lol.