Jump to content

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

RyanbabZ71
 Share

Recommended Posts

ChevyTech77 Senior Enthusiast

ChevyTech77

Posted
Posted

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.

post-84205-133587982118_thumb.jpg

post-84205-133587982118_thumb.jpg

post-84205-133587982118_thumb.jpg

post-84205-133587982118_thumb.jpg

  • Replies 1k
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Popular Posts

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

Posted Images

RyanbabZ71 Senior Enthusiast

RyanbabZ71

Posted
  • Author
Posted

Not bad!

 

I can't drive normal so I only see 11-12 :lol (E85 powered)

 

 

Ryan

 

Sent from my iPhone using Tapatalk

ChevyTech77 Senior Enthusiast

ChevyTech77

Posted
Posted (edited)

This average calculation was started with the truck still running ethanol on the trip up (100 miles one way and I went up and back the same day) so it still had 3-4 gallons of ethanol in the tank when I filled it back up with premium fuel for the ride back home.

Edited by ChevyTech77
Z45 Senior Enthusiast

Z45

Posted
Posted

2012 AWD Sierra Denali 2,300 miles since new (3/27/12) and average mpg is 17.8. One 500 mile and 2-200 mile trips, 55-65 mph 2-lane, no hot-rodding, use cruise all the time, Shell premium 91 octane primarely but a tank or two of Murphy 93 (WM) mixed in, no E85 around here. No mods planned except all AMSOIL 100% synthetic fluids going in before 5,000 miles. That raised my awd CTS4 mpg nearly 1 mpg.

  • Like 1
'01LS1 Senior Enthusiast

'01LS1

Posted
Posted

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.

RyanbabZ71 Senior Enthusiast

RyanbabZ71

Posted
  • Author
Posted

You know the avg mpg setting can be changed right? I reset mine at each fillup

 

 

Ryan

 

Sent from my iPhone using Tapatalk

'01LS1 Senior Enthusiast

'01LS1

Posted
Posted

You know the avg mpg setting can be changed right? I reset mine at each fillup

 

 

Ryan

 

Sent from my iPhone using Tapatalk

 

 

Did not know that. Have always just left one main one alone. But that was in a 2007 LBZ Dually. Thanks

ChevyTech77 Senior Enthusiast

ChevyTech77

Posted
Posted

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.

David_L6 Enthusiast

David_L6

Posted
Posted

You know the avg mpg setting can be changed right? I reset mine at each fillup

 

 

Ryan

 

Sent from my iPhone using Tapatalk

 

 

Does that also apply to a 2008 Silverado? If that can be reset I didn't know it and don't know how. My truck was showing 17.6 yesterday when I sold it to my son.

David_L6 Enthusiast

David_L6

Posted
Posted

Not many options other than the Max Trailering Pack.

 

The most important one. looks good :thumbs:

 

 

You got that right!

 

The main reason I wanted a new truck was to get a crew cab. My old truck was an extended cab. Also, the 6.2 with the Max Trailering Pack should make pulling my 7' X 16' enclosed trailer a breeze.

RyanbabZ71 Senior Enthusiast

RyanbabZ71

Posted
  • Author
Posted

You know the avg mpg setting can be changed right? I reset mine at each fillup

 

 

Ryan

 

Sent from my iPhone using Tapatalk

 

 

Does that also apply to a 2008 Silverado? If that can be reset I didn't know it and don't know how. My truck was showing 17.6 yesterday when I sold it to my son.

 

Should be I could in my 08 Tahoe

 

When you hit the mpg screen press and hold the checkmark button

 

 

Ryan

 

Sent from my iPhone using Tapatalk

Z45 Senior Enthusiast

Z45

Posted
Posted (edited)

I never reset it in any of my vehicles, the aveage mpg is the only thing of importance to me. My last truck was a 2010 Sierra All Terrain 5.3L E cab and in the 24,000 miles the aveage readout was 17.7 but I also drove almost 1/2 of those miles in winter using AUTO 4x4 mode all the time. The All Terrain pkg rode too rough for my taste.

 

I too never bought it for mileage, needed a CC for business and wanted a top line truck w/o AFM.

Edited by elcamino
  • Like 2
RyanbabZ71 Senior Enthusiast

RyanbabZ71

Posted
  • Author
Posted

If you collect your gas receipt/milage data you can calculate it

 

If you continually reset it you can catch possible issues quick (drastic drops in mpg that would go unnoticed if you didn't reset)

 

To each their own

 

 

Ryan

 

Sent from my iPhone using Tapatalk

DonnyStevens Enthusiast

DonnyStevens

Posted
Posted

Just ordered my Auto-Cal from BB. Anticipation is killing me, just like all of you. Any tips from you guys with an Auto-Cal on my next steps when I finally get it? I thought I should receive an e-mail from BB but still waiting. I know they are really busy and a small operation respectively so I guess I will just wait patiently :tumbleweed:

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Forum Statistics

    250.5k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    342,914
    Total Members
    8,960
    Most Online
    AidenVorpagel
    Newest Member
    AidenVorpagel
    Joined

  • Who's Online   3 Members, 0 Anonymous, 1,299 Guests (See full list)

  • Latest Articles

  • Posts

    • jake111
      Gasser Subforum Has Been Quiet - - So, Regenerative Braking and Using L10

      By jake111 · Posted

      Thanks newdude!  By the time manual selection is needed, I'm probably too much of a control-freak to depend on the transmission sensing braking to activate automatic downshifting.  I would be anticipating the situation and already be manually downshifting.   This truck replaced a 2004.5 LLY diesel with the Allison 5-speed.  Putting it in T/H made noticeable differences (when the torque converter locked, upshift points, downshift behavior).  On this 2024 gasser with the 10L1000 I haven't been able to detect much, if any, difference.  Ok, I can never tell now when the torque converter locks up.  But I also don't notice differences in shifting.  For downhills, I've probably already manually downshifted by then anyway.  Since it's also more awkward (than the 2004.5) to engage/disengage I don't even bother.  Or maybe it doesn't really matter with just a 3k lb. camper in the bed?   Thanks also for the list of reasons the charging system might select various voltages.  However, what I am seeing doesn't fall into any of those categories.  It very definitely, and very consistently, rises after coasting/braking.  Maybe not immediately, but not very long after coasting/braking.  Very consistently drops voltage when no longer coasting/braking.  It might also be interacting with the camper battery charging (I might disconnect the camper and see if it changes the charging behavior).  I also need to recheck turning on headlights for when I want to force it to charge the camper.   Another JR, in June I converted the camper to LiFePO4.  Since it's not a good idea to try to charge lithiums directly using truck, I installed a Victron Orion XS DC-DC charger (which BTW is AMAZING!!).  Being cheap, I only had to buy that one item (besides the battery, of course) to do the conversion.  The camper OEM 120v battery charger (only 19 years old and works perfectly) and the truck feed the input to the DC-DC charger (not at the same time).  But I didn't want the camper charger feeding back to the truck so I kept the old separator.  I considered replacing the separator with a 30amp diode but that means more work and might add another 1/2 volt drop.  One thing that surprised me was the voltage drop over the long 10awg wire run, so I can only charge smoothly at 8 amps (because the DC-DC charger is completely configurable).  Another reason I don't want an added voltage drop with the diode.  I might also be a little lazy but all this work is being done under the sink with a small cabinet opening.    
    • davester
      cam upgrade in CA

      By davester · Posted

      apparently CA smog is (or at least was)  checking that the vehicle is using the oem and/or a ca smog approved tune, so I expect you'll fail inspection doing it.
    • davester
      Possible lifter tick after DOD delete

      By davester · Posted

      yes, leaking exhaust will mess up o2 sensor readings, which in turn messes up fuel trims.
    • Grumpy Bear
      Sugar Bears 2015 GMC Terrain SLE-2 2.4 AWD

      By Grumpy Bear · Posted

      286,740 Mile Services   8/6/2026   New AC Compressor. Refrigerant oil and dye, evacuate and charge system.  New exhaust system from cat back.  New Iridium plugs plus replace #3 coil Repair/rewire headlamp wiring (passenger side) and replace all forward bulbs. Polish lenses of both assemblies.  Pull rear rotors, clean and adjust parking assembly. Inspect, clean and grease front calipers. Check pads and shoes.  4 wheel power bleed of brake system. Dot 4 Reset idle speed 50 rpm higher New Serpentine belt.    Will need new pads in the rear in about 5K more miles.    Tax Title and License out the door just short of a grand.    AC clutch had bitten the dust. 1 year warranty on the pick and save replacement. Thing will make a Polar Bear cry Uncle.  He spent quite some time on the wiring. It was in the harness and he does nothing half. I got off cheap. I have considerable more light down the road. Sylvania Silver Star replacements.  Gas seal between the porcelain and shell of plug #3 was blown, cooked the coil. That was the cold miss.  Love the new exhaust. I can sneak into the neighborhood again.  Nice to have a working parking brake again. Belle Tire never got it done. That was disappointing.    This was one of her bigger bills and still way cheaper than a payment even given the oil consumption. This thing cost me under a hundred a month in repairs and normal routine costs. What is my incentive to replace it? 🤔           
    • AidenVorpagel
      cam upgrade in CA

      By AidenVorpagel · Posted

      hello I recently bought a 2012 gmc 1500 with a 5.3 and have a AFM disabler on it I'm interested in doing a cam but I'm worried if I remove the AFM system I will fail smog does anyone have info if they are able to detect that or a work around to it (not talking about hot smogging) please let me know thank you  

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...