top speed limiter on an '04 silv.?

Jeff1 · September 4, 2004

Are the '04 trucks limited to 98 mph like my '99? The truck in question is a 1500 crew z71 with the 5.3 and 3.73 gears. A guy is telling me he had it up to 120 the other day (it is stock).

maximumrebel1 · September 4, 2004

98 is about it I have no idea why they have the speedo to 120.

Jeff1 · September 4, 2004

98 is about it I have no idea why they have the speedo to 120.

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Thanks, that's what I figured. I told the guy he must have been going 120km per hour. I'm not so sure that particular truck would do 120 mph anyway (weight).

NOS#9BIGMAC · September 5, 2004

My roomates 97 z-71 shuts off at about 100mph then powers back up at about 90-95 so I would say no the top speed limiter has been eliminated. Either that that or someone is blowin sunshine up your butt unless the 04 have the limiter removed but I don't think so. Could be wrong though But I doubt it

Jeff1 · September 5, 2004

The truck is brand new, completely stock.

lrymal · September 5, 2004

The truck is brand new, completely stock.

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There really is a speedlimiter. It kills high ignition and cuts off the fuel. When the truck coasts downward a bit, ignition and fuel kicks in, only to be cut off again when the cut-off limit is reached--again.

When you get a custom PCM, you can have the speedlimiter eliminated, such as for competition NASCAR, etc. There is nothing wrong with your truck.

Not sure what this means or its relevance: "Either that that or someone is blowin sunshine up your butt "

Musclemax500 · September 6, 2004

yea my limiter is at 100 for now

05Silverado81 · October 11, 2005

My 05 Z71 is at 100 mph, they also don't cut off the fuel anymore, they are governed for 100, just won't go past that

Silveradoguy04 · November 4, 2005

yea my limiter is at 100 for now

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From what I heard the reason they set it up like that was because the axles are not strong enough to go past 100mph. Thats what I heard anyway.

PewterC3 · November 5, 2005

the stock limiter on my C3 was 106 or 108 as I recall....it's not anymore though!

ArizonaSS · November 13, 2005

i have a diablosport predator programmer for sale that can eliminate that

SS Crew · November 16, 2005

yea my limiter is at 100 for now

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From what I heard the reason they set it up like that was because the axles are not strong enough to go past 100mph. Thats what I heard anyway.

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The tires' speed ratings are the limiting factor. How's the axle's strength going to limit the speed? The axle will limit the load it's moving.

wages999 · July 11, 2006

I have an '04 1500 Crew Cab with the 5.3 and 3.73's. I can't vouch for 120mph, but I've see between 103 to 105 a couple of times and it doesn't seem to be slowing down, just ran out of road.

StreetBeatYUKON · July 11, 2006

From what I have been told it is depending on saftey tire ratings. This is why they vary. Like my 06 sierra denali is 100 where as my friends trailblazer SS is 120. The denali comes on 17's w/ a low speed rating where the

SS comes w/ 20's w/ low pros and hi speed rating. And even brand new can be modded keep this in mind, I am an after market shop and we sell "superchips" programmmers to the dealers by the 10's to help on mpg to ease the sale on a new V8 price tag. They are plug in, naked eye would never know it is there and does remove the limiter.

toneman · July 12, 2006

From what I have been told it is depending on saftey tire ratings. This is why they vary. Like my 06 sierra denali is 100 where as my friends trailblazer SS is 120. The denali comes on 17's w/ a low speed rating...
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Interesting...what brand tires did your SD (originally) come with, and/or what is the speed rating on them? I ask because my '04 DXL came w/ 17" Goodyear Wrangler HP tires, and the rev limiter in my unmodified (at the time) SUV did not kick in at 100 mph--I was trying to see if it would do so at that speed, and was somewhat surprised (I say "somewhat" because I had read elsewhere that the Denalis and Escalades did not have a 100-mph limiter) that it didn't. Surely the General didn't decide that '06 SD trucks were worthy of wimpier tires than those found on '04 YXL SUVs, did they?