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

RyanbabZ71
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RyanbabZ71 Senior Enthusiast

RyanbabZ71

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When you get it go on their site and put in the autocal code from your programmer

 

 

Ryan

 

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DanMan_S
DanMan_S

This is a video showing how the 6.2L sounds with headers and a corsa catback. The crew cab is my 6.2L, the 2005 extended cab is a 5.3L with a magnaflow muffler welded in.    

gonzoid
gonzoid

finished product  

2010LTZ4x4
2010LTZ4x4

Where did you get the 6.2L badge in you avatar?  Heres the info for the 6.2L badge Top Flight Reproductions is proud to announce the addition of the 6.2L emblem to our emblem product line. This embl

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'01LS1 Senior Enthusiast

'01LS1

Posted
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Eat your heart out EB fans. This is no b.s. and no I was not drafting a semi, going downhill or gettting pushed by a good tailwind.

 

 

Good to see that! Just called on a 2010 GMC with a 6.2 & asked the salesman to tell me what the avg mpg was... 13.2 with 53,000 miles on it. Hope the guy had a lead foot because I am still going to go check it out.

 

Mine probably averages that as well but I only have a 2 mile drive to work and I'm usually running ethanol these days.

 

Don't buy it for the fuel mileage. My post was just to prove that a similarly equipped EB F-150 DOES NOT get a ton better mileage than a 6.2l GM. ESPECIALLY when they are towing a load then the GM 6.2l kills it.

 

No worries there. But I probably look to hard because I own a semi with a C12 CAT, so in my world tenths make a difference. :driving:

200kss Enthusiast

200kss

Posted
Posted

Anyone going to try Maganflow's catback p/n 15121? I've run Magnaflow kits on my last 2 trucks but have to wait for a screaming deal to pull the trigger on this one. BTW, I switched from 87 octane to 93 octane and haven't felt any power increase, TBD on fuel economy.

David_L6 Enthusiast

David_L6

Posted
Posted

Had a chance to check my mileage on a trip this past weekend. Mixture of interstate, highway, and city. (2012 crew cab with Max Trailering Pack.)

 

First tank almost all interstate: 16.0

 

Second tank interstate, highway, and city: 14.1

 

Third tank interstate and highway: 16.9

11Silvy Enthusiast

11Silvy

Posted
Posted

Anyone going to try Maganflow's catback p/n 15121? I've run Magnaflow kits on my last 2 trucks but have to wait for a screaming deal to pull the trigger on this one. BTW, I switched from 87 octane to 93 octane and haven't felt any power increase, TBD on fuel economy.

 

 

Save your money and just buy the muffler #12909. It will fit with a little modification.

AaronIROCZ Enthusiast

AaronIROCZ

Posted
Posted

OK after 3700 miles and a fresh tank of 91 octane fuel I tested the MPG's with my 6.2 and 3.42 gears and drove around 200 miles and got 18.3 MPG according to the DIC. It is the best MPG's I have had yet!!

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200kss Enthusiast

200kss

Posted
Posted

Anyone going to try Maganflow's catback p/n 15121? I've run Magnaflow kits on my last 2 trucks but have to wait for a screaming deal to pull the trigger on this one. BTW, I switched from 87 octane to 93 octane and haven't felt any power increase, TBD on fuel economy.

 

 

Save your money and just buy the muffler #12909. It will fit with a little modification.

 

 

Thanks for the p/n. Any soundclips online with just the muffler (no headers)? Came up empty on a search. What kind of mods are needed with the muffler only swap? I'm sure my local exhaust shop can handle it, just like to give them a heads up.

  • 2 weeks later...
txmuder Enthusiast

txmuder

Posted
Posted

Out with the old and in with the new Guys and Gals. Well I was happy with my ext-cab truck but that was until my baby girl was born on the 16th of May, now it baby seats wife in the back, and all the rest that goes with it LOL. I am picking up my new 2012 silverado Texas Edition CC on Monday 6-27-2012, with a few more options chosen this time but I am sticking with the 6.2 L as I really enjoy having it in my ext-cab 2011 silverado. There is just not enough room in a Ext-Cab, it only took me 2-3 trys loading the baby up w/car seat and I said to heck with that and went shopping on line and visited a few dealerships for best price and deal I could get and settled on a White CC that I will transfer all my mods over to as soon as I get it. and post picture soon.

 

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David_L6 Enthusiast

David_L6

Posted
Posted (edited)

Checked my mileage again this past weekend while towing a 6' X 10' enclosed trailer. A bit over 200 miles each direction. Running 76 mph - 77 mph into a headwind going I got 8.7 mpg. eek.gif Coming back I drove 74 mph - 75 mph and had a slight tail wind. Got 9.8 mpg. frown.gif Not good at all considering how little weight I was hauling. Going to be "interesting" to see what I get when I tie onto my 7' X 16' enclosed trailer....

Edited by David_L6
becker87 Senior Enthusiast

becker87

Posted
Posted

Checked my mileage again this past weekend while towing a 6' X 10' enclosed trailer. A bit over 200 miles each direction. Running 76 mph - 77 mph into a headwind going I got 8.7 mpg. eek.gif Coming back I drove 74 mph - 75 mph and had a slight tail wind. Got 9.8 mpg. frown.gif Not good at all considering how little weight I was hauling. Going to be "interesting" to see what I get when I tie onto my 7' X 16' enclosed trailer....

 

 

Wind will kill your mileage, even more then the trailer I bet. This past Satuday I drove about 150 miles, unloaded, with about a 15-20 mph hour cross wind, and while driving around 70 I was getting a little under 14 according to the DIC. On the way back last night, driving about 69 on interstate with no wind I was getting about 17.5 according to the DIC

crose Enthusiast

crose

Posted
Posted

Does anyone know if the vette servo works on the 6.2 with the 6 speed auto? From what info I found it seems that most are for the old 4 speed auto? Also I plan on getting a BB tune down the road after some other mods are done but didn't know if the vette servo is really worth it if I get the same results from a BB tune down the road. But what gear range does the vette servo apply too? I hear a lot about torque management with a BB tune and wondering if the vette servo does the same thing in terms of torque management? Thanks in advance!

ChevyTech77 Senior Enthusiast

ChevyTech77

Posted
Posted (edited)

No servo on the 6 speed.

 

Got 14.5 mpg pulling my 2100 lb pop-up camper and about 500 lbs of additional cargo running 75 mph over a 300 mile road trip this past weekend and I was bucking 15-20 MPH winds up and back.

 

Edit:

Oh and the a/c was on too.

Edited by ChevyTech77

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