6.2L (L9H) Owners - Get all your questions answered here

[vettelovralexand]

So to recap,

 

L9H > L92

 

Wanna line up?!

 

 

Sure, there is a track about 2 miles from me (formally known as ORP)

 

2 yrs just under 22K miles here

 

 

Let me know if you really do ever go. I'd love to run my truck again...

[jim1450]

Hey guys, I got my new sierra a week ago. The 6.2 is amazing and so is the knowledge gained in these threads. First on the list is a K&N intake and a Magnaflow exhaust. After that a custom tune from Nelson this summer, because I can't get a response from BlackBear. Still in the break-in stage and still haven't really got on the gas

 

 

i got on the gas from day 1. i read about the hard break-in, and it makes sense to me, supposed to seal the rings better initially. Controversial but figured i would give it a shot. currently @2500k with no issues,

http://www.mototuneu..._in_secrets.htm

http://www.crateengi...es-W106C46.aspx

 

I don't think the crateenginedepot.com break in procedure is meant for production engines, I would bet the tolerances & clearances are way different in a crate motor. The 20W50 oil recommendation is not correct for production LS motors & AC Delco oil filters suck

[RyanbabZ71]

So to recap,

 

L9H > L92

 

Wanna line up?!

 

 

Sure, there is a track about 2 miles from me (formally known as ORP)

 

2 yrs just under 22K miles here

 

 

Let me know if you really do ever go. I'd love to run my truck again...

 

 

Havent taken my truck there. I am really hoping to get a camaro then I will spend some time up there

[Coolmaker]

Last night I was able to take my new truck (GMC Sierra SLT 6.2 3.73'S) on the interstate.. Speed limiter came on at 92 mph.. Is this normal????

[RyanbabZ71]

yep the factory limiter is around 92-93. THis is based on the speed rating of your tires.

[Wolfmanjohn]

The Helm 2007 GMT/07-CKUV-2 manual states in volume 2, chapter 9, page 721, Engine Content Specification chart, that the L92 of that year, both first and second design, are not E85 capable (first design=AFM hardware, but AFM system inactive; second design=no AFM hardware).

 

92 speed limiter? Really!? That's WAY too low! Too easy to get into a 2 lane road/highway passing situation and not be able to complete it because of that, with possibly fatal consequences! I think of my kids' driving habits when I write this; they'll never remember until too late if I tell them. Looks like that'll be getting tuned out real soon! Next, I guess I'll be looking into the tire situation, as exceeding speed ratings carry consequences of their own.

 

My kids still think they're driving my old 'Vette when behind the wheel of the truck.

[EX-F150 owner]

92 speed limiter? Really!? That's WAY too low! Too easy to get into a 2 lane road/highway passing situation and not be able to complete it because of that, with possibly fatal consequences!

 

You need to do 100mph to pass? Really? Hope you don't get clocked at that speed you'll be posting from jail

[Wolfmanjohn]

92 speed limiter? Really!? That's WAY too low! Too easy to get into a 2 lane road/highway passing situation and not be able to complete it because of that, with possibly fatal consequences!

 

You need to do 100mph to pass? Really? Hope you don't get clocked at that speed you'll be posting from jail

 

 

I don't plan on it, but the need to could arise unexpectedly, and I'd like the "headroom" to do it available.

[wavery]

92 speed limiter? Really!? That's WAY too low! Too easy to get into a 2 lane road/highway passing situation and not be able to complete it because of that, with possibly fatal consequences!

 

You need to do 100mph to pass? Really? Hope you don't get clocked at that speed you'll be posting from jail

 

My sentiments exactly...... if you need to exceed 92MPH to pass another vehicle, may you should consider giving yourself more distance before executing a pass, not more speed.

 

Assuming the person that you are passing is doing less than 80, you would be passing the person @ over 12MPH. @ 12MPH, it should take about 5 seconds to pass.

[Coolmaker]

Whew, truck came with Goodyear Wranglers on it rated 112mph.. They made road noise, so at 42 miles, I changed to Michelin LTX's which are rated at 118mph.

 

Now, how do I get the limiter raised?? TIA

[EX-F150 owner]

Programmer

[ChevyTech77]

Mine certainly doesn't shut down at 92. More like 99 but not 92, for sure.

[wavery]

Mine certainly doesn't shut down at 92. More like 99 but not 92, for sure.

 

I used to have a Chrysler Concorde. The "check engine" light would come on @ 90MPH...... and stay on.......

Edited December 23, 2011 by wavery

[Wolfmanjohn]

92 speed limiter? Really!? That's WAY too low! Too easy to get into a 2 lane road/highway passing situation and not be able to complete it because of that, with possibly fatal consequences!

 

You need to do 100mph to pass? Really? Hope you don't get clocked at that speed you'll be posting from jail

 

My sentiments exactly...... if you need to exceed 92MPH to pass another vehicle, may you should consider giving yourself more distance before executing a pass, not more speed.

 

Assuming the person that you are passing is doing less than 80, you would be passing the person @ over 12MPH. @ 12MPH, it should take about 5 seconds to pass.

 

 

About 10 years ago, in my '98 Silverado 5.7, I came up on a Cavalier doing ~65 on a long, straight, level 2 lane road in the middle of a clear, sunny day. Son and I saw headlights of an oncoming truck waaaaay off in the distance, and both agreed there was ample space and time, so I began my pass at 70. Our truck went to 98, when the limiter kicked in; meanwhile, that oncoming truck got real close real fast. Yeah, we made the pass in less than 5 seconds, but that didn't mean squat in light of the fact the oncoming vehicle was probably doing the average speed of 95 that all people do on that road (SR 198; Coalinga - Hanford). But we could not gauge that when the truck was so far away at the onset of the maneuver. See why I would like the extra fudge factor? It's not about me; it's about the speed of oncoming vehicles and the ability to accurately assess it from a great distance.

[EX-F150 owner]

92 speed limiter? Really!? That's WAY too low! Too easy to get into a 2 lane road/highway passing situation and not be able to complete it because of that, with possibly fatal consequences!

 

You need to do 100mph to pass? Really? Hope you don't get clocked at that speed you'll be posting from jail

 

My sentiments exactly...... if you need to exceed 92MPH to pass another vehicle, may you should consider giving yourself more distance before executing a pass, not more speed.

 

Assuming the person that you are passing is doing less than 80, you would be passing the person @ over 12MPH. @ 12MPH, it should take about 5 seconds to pass.

 

 

About 10 years ago, in my '98 Silverado 5.7, I came up on a Cavalier doing ~65 on a long, straight, level 2 lane road in the middle of a clear, sunny day. Son and I saw headlights of an oncoming truck waaaaay off in the distance, and both agreed there was ample space and time, so I began my pass at 70. Our truck went to 98, when the limiter kicked in; meanwhile, that oncoming truck got real close real fast. Yeah, we made the pass in less than 5 seconds, but that didn't mean squat in light of the fact the oncoming vehicle was probably doing the average speed of 95 that all people do on that road (SR 198; Coalinga - Hanford). But we could not gauge that when the truck was so far away at the onset of the maneuver. See why I would like the extra fudge factor? It's not about me; it's about the speed of oncoming vehicles and the ability to accurately assess it from a great distance.

 

Sounds like this is a road to tell your son not to pass on