picked up my 07 L76 a few days ago.

[383ss]

I traded in the SSS for a black exteneded cab, 4X4, Z71 6.0L NBS.

 

so far I love the truck, but it definately needs some changes. the 6.0L is pretty gutless. I don't think it feels that much faster than a 5.3L. I would guess my SSS stock was faster. so tuning is going to be one of the 1st priorities. the PE delay and TM are retarded. the muffler also has to go, its just way too tame.

 

gas mileage is pretty good, even though it rarely kicks into V4 mode. in 90* heat it will only kick in downhill going as slow as 60mph. interestingly though, when I drove it in the low 70*'s it would kick in on flat surfaces up to around 70mph.

 

 

mods planned are GM CAI, UDP, tuning and muffler. hopefully it will run low 14's and get 20mpg on the highway.

[aaron_c]

I traded in the SSS for a black exteneded cab, 4X4, Z71 6.0L NBS.

 

so far I love the truck, but it definately needs some changes. the 6.0L is pretty gutless. I don't think it feels that much faster than a 5.3L. I would guess my SSS stock was faster. so tuning is going to be one of the 1st priorities. the PE delay and TM are retarded. the muffler also has to go, its just way too tame.

 

gas mileage is pretty good, even though it rarely kicks into V4 mode. in 90* heat it will only kick in downhill going as slow as 60mph. interestingly though, when I drove it in the low 70*'s it would kick in on flat surfaces up to around 70mph.

mods planned are GM CAI, UDP, tuning and muffler. hopefully it will run low 14's and get 20mpg on the highway.

 

 

You really think you can get that big truck to run low 14's and get 20mpg on the highway with those mods? What are you getting on the highway right now?

 

Also, just wondering..if the 5.3L felt almost as strong as the 6.0, why didn't you get the 5.3 to save some money on gas? It probably wouldn't amount to all that much, but just curious. Got any pics of the truck?

Edited June 23, 2007 by aaron_c (see edit history)

[cerbomark]

I have a question for you. If I floor it from a stop, it doesn t break the rear wheels. Whats up? Is that normal. PS

Thats with a pcmforless tune. Thats without powerbreaking it or anything. Wondering if something is wrong?

20 inch wheels too.

Edited June 25, 2007 by cerbomark (see edit history)

[383ss]

You really think you can get that big truck to run low 14's and get 20mpg on the highway with those mods? What are you getting on the highway right now?

 

Also, just wondering..if the 5.3L felt almost as strong as the 6.0, why didn't you get the 5.3 to save some money on gas? It probably wouldn't amount to all that much, but just curious. Got any pics of the truck?

well, the mods I have listed will only improve MPG and power, so ya, I think I can.

 

right now between city and highway its getting 16mpg. when I go on a roadtrip, I'll document what it gets at 70, 75 and 80mpg on the highway. I'm hoping for 20mpg at 70mph, with mods. that may be wishful thinking.

 

the 6.0L only gets 1mpg less than the 5.3 and the 6.0 obviously has more potential being the bigger motor and better heads, plus it has VVT. Its rated at 57more hp stock, it just needs a little tuning to really feel it. no-brainer to me. I'd much rather have the power than the 1mpg.

 

I have a theory that the 6.0L may be able to kick into V4 mode more than the 5.3L because of the larger motor size. so with some tuning and experimenting maybe the 6.0L can get as good or better gas mileage than the 5.3L with the same mods.

[383ss]

I have a question for you. If I floor it from a stop, it doesn t break the rear wheels. Whats up? Is that normal. PS

Thats with a pcmforless tune. Thats without powerbreaking it or anything. Wondering if something is wrong?

20 inch wheels too.

 

 

I have not tried anything like that, but I'm sure the TM severly limits it.

 

I would guess it would be able to break them loose with tuning, but maybe not. with a 5500lb truck and 20's in back with a locking diff, it may not be able to.

[delete me]

I have a question for you. If I floor it from a stop, it doesn t break the rear wheels. Whats up? Is that normal. PS

Thats with a pcmforless tune. Thats without powerbreaking it or anything. Wondering if something is wrong?

20 inch wheels too.

 

2007 nbs V-MAX magnaflow cat back GM per. CAI with ram air & superchips flashpaq

Has anyone tryed a hand held programer if yes what brand i have a CP flashpaq the power's not to bad.

Thinking about trying the diablo sport it will let you turn off TM system bypas 02 sensors for empty cat's .

looking for some feed back .

Love the truck but take off sucks becouse of the TM system can feel the power is there but put it to the floor and it's like the throttle is taken away from me need help

[zippy]

You're going to like it for sure. Low 14's with your list of mods should be a cakewalk. My boss has one that I've been working on with the NHT package. After programming alone it was considerably faster/quicker.

[delete me]

You're going to like it for sure. Low 14's with your list of mods should be a cakewalk. My boss has one that I've been working on with the NHT package. After programming alone it was considerably faster/quicker.

 

 

But what do you think of the diablo pro, I have got the pro and it seems to be pritte good turned of TM system and whent 14.2 in the 1/4 mile but how do you think the o2 bypas is going to work with no cat's

Edited July 5, 2007 by overkill (see edit history)

[johnfruitt]

But what do you think of the diablo pro, I have got the pro and it seems to be pritte good turned of TM system and whent 14.2 in the 1/4 mile but how do you think the o2 bypas is going to work with no cat's

 

 

My 07 GMC Sierra crew Vortec max just got tuned on a dyno and had the gov taken out and the TM program diabled and I got 50 more foot lbs through the lower rpm range and he also tightened up the shifts. It made a huge difference in how the truck drives. I also have the trailering package so I have the 4.10 gears. The 20 inch wheels and it won't burn out but If you disengage the traction control she cherps all over town. I'm looking for headers and a high flow cats, I'm ordering a cold air intake form outlaw power as soon as they tell me which one fits it.

[rivierakid55]

My 07 GMC Sierra crew Vortec max just got tuned on a dyno and had the gov taken out and the TM program diabled and I got 50 more foot lbs through the lower rpm range and he also tightened up the shifts. It made a huge difference in how the truck drives. I also have the trailering package so I have the 4.10 gears. The 20 inch wheels and it won't burn out but If you disengage the traction control she cherps all over town. I'm looking for headers and a high flow cats, I'm ordering a cold air intake form outlaw power as soon as they tell me which one fits it.

 

dyno sheet! 50 ft lbs of torque more at the wheels with a tune? im sorry but till i see a dyno to prove that im calling

Edited July 12, 2007 by rivierakid (see edit history)

[PatrickSilverado]

He said 50 more lbs. of torque, not 50 more hp.

[johnfruitt]

He said 50 more lbs. of torque, not 50 more hp.

 

Carolina Auto Masters of Durham NC did it and I'm sure Jeff would be happy to tell you about it. To be honest I was so excited to drive it I forgot to pick up my dyno sheet. He has been on the show "Pinks" and tunes many highly modified corvettes as well as other GM trucks and cars. I don't mind if you believe me or not, I was just on here to tell you guy's that the TM program when removed made a massive difference, like I said before 50LBS between 1500 and 4500. A guy walked in on my second dyno and asked if we had put a cam in. That was cool!

[PatrickSilverado]

Carolina Auto Masters of Durham NC did it and I'm sure Jeff would be happy to tell you about it. To be honest I was so excited to drive it I forgot to pick up my dyno sheet. He has been on the show "Pinks" and tunes many highly modified corvettes as well as other GM trucks and cars. I don't mind if you believe me or not, I was just on here to tell you guy's that the TM program when removed made a massive difference, like I said before 50LBS between 1500 and 4500. A guy walked in on my second dyno and asked if we had put a cam in. That was cool!

 

 

Ohh i wasn't sayin i didn't believe you. just someone had it messed up sayin you made 50 extra horse power when you said you made 50 extra torque. Making 50 more torque would sound more possible than 50 more horse power.

[edagit]

I have a question for you. If I floor it from a stop, it doesn t break the rear wheels. Whats up? Is that normal. PS

Thats with a pcmforless tune. Thats without powerbreaking it or anything. Wondering if something is wrong?

20 inch wheels too.

 

This is my first post on any type of message board, sorry in advance. Dad's dad was a Chevy dealer, so have had the bug since birth. Searched aimlessly for performance tips on google, got sick of stumbling over so many Tundra and F150 message boards bashing Chevy, needed a place to vent! Plus pick up a few tips so I can keep smokin' em here in Seattle!

 

Having the same problem cutting tires loose. Easy with a touch of rain, but no luck on dry pavement. Just moved from Illinois, so amidst trying to find a good dealer for warranty 'repair' (missing A/C compressor belt...forgot at factory), started talking with few techs.

 

Seems the 6.0 has a torque limiter in the ECM restricting fuel until 4sec throttle duration. This is, of course, on top of StabiliTrak, which is even worse. Already have a phonecall in to Superchip to see if the Flashpaq takes care of this, along with the pesky rev limiter. Will keep you posted if hear anything.

 

In the mean time, any advice on CAIs? The GM performace kit looks sweet, but it's twice the price of K&N, has a metal intake, and no advertised results...

[johnfruitt]

This is my first post on any type of message board, sorry in advance. Dad's dad was a Chevy dealer, so have had the bug since birth. Searched aimlessly for performance tips on google, got sick of stumbling over so many Tundra and F150 message boards bashing Chevy, needed a place to vent! Plus pick up a few tips so I can keep smokin' em here in Seattle!

 

Having the same problem cutting tires loose. Easy with a touch of rain, but no luck on dry pavement. Just moved from Illinois, so amidst trying to find a good dealer for warranty 'repair' (missing A/C compressor belt...forgot at factory), started talking with few techs.

 

Seems the 6.0 has a torque limiter in the ECM restricting fuel until 4sec throttle duration. This is, of course, on top of StabiliTrak, which is even worse. Already have a phonecall in to Superchip to see if the Flashpaq takes care of this, along with the pesky rev limiter. Will keep you posted if hear anything.

 

In the mean time, any advice on CAIs? The GM performace kit looks sweet, but it's twice the price of K&N, has a metal intake, and no advertised results...

 

On the the CAI I'm looking at a Outlaw Performance intake, still waiting for them to give me the correct part number for my truck...should cost about $300. I have the 20 inch rims and mine has been tuned and I cannot break them from a dead stop....unless I stomp the gas and then the break then release the break. Kind of a power break and kind of like the start of a drift.