Interested in comments from those that have modified tire size on 2006 LLY/LBZ and used a handheld power programmer to keep speedo calibration accurate.
What is best value in programmers? Who has best tow/economy tune?
Interested in comments from those that have modified tire size on 2006 LLY/LBZ and used a handheld power programmer to keep speedo calibration accurate.
What is best value in programmers? Who has best tow/economy tune?
2011 Chevrolet Tahoe 5.3L daily driver
- Previous owner of two 1994 6.5L K3500s, '01, '02, and '05 6.6L K2500s, '04 C4500, '06 K3500 dually, '06 K3500 SRW, '09 K3500HD SRW, '05 Denali
- Total GM diesel miles to date : ~950K
I spoke with a guy yesterday who is quite happy with his Hypertech, which does stress improved fuel economy as one of the features for their programmer.
Jim
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I acquired an '03 Silverado w/duramax, which had P285 tires.
Watching the odometer on regular trips, some error was noticed.
I took to dealer for some reference service, and asked to calibrate speedometer for P285 tires. Was charged $45 to tell me they can't.
In addition, they claimed they could not perform a front end alignment due to the P285 tires.
Now I really know why some members refer to the "stealer".
1997 Chevy Suburban LS C1500 6.5L (really 3/4 ton, 8 lug wheels, etc.) Kennedy 3.5" exhaust, ECM and fan clutch, AFE intake, intercooler, Transgo HD2 shift kit, J&B torque converter, towing 30' Layton Scout 294(8000+ lb.) one wife, 4 kids, 5 grandkids, one dog, one cat
2003 Chevy Silverado Crewcab K2500HD Duramax(no mods yet)
when I had my 04 gasser w/ 285's, the dealer told me up-front they couldn't set the speedo for them, they could only recalibrate it up to 265's.
they told me; cause 265's are the largest tire GM offered on our trucks, then said my warranty on the drivetrain was void now cause of the 285's this happened when my 04 was only a week old
so now you know why there is still 245's on my LBZ
I have been emailing and calling GMC non-stop, asking them; what is the largest tire diameter tire allowed without voiding my warranty, THEY WILL NOT RESPOND TO MY QUESTION!!!
I told them I want it in writing so I had documentation of this, because every dealer gave me a different answer, and not one would provide it in writing
07 GMC CC SB LBZ
70 monte carlo, original 4 spd, bench seat
71 monte carlo SS clone, street/strip
97 grand am, beater
No thread hijacking, please. Topic is hand-held programmers for 06 LLY.
2011 Chevrolet Tahoe 5.3L daily driver
- Previous owner of two 1994 6.5L K3500s, '01, '02, and '05 6.6L K2500s, '04 C4500, '06 K3500 dually, '06 K3500 SRW, '09 K3500HD SRW, '05 Denali
- Total GM diesel miles to date : ~950K
I have just recently bought a Programmer III from Hypertech. I have an 05 D/A. I have noticed considerable performance impovements. However, my fuel mileage is still in the toilet. I don't know why. DIC is close enough to doing it by hand. I am getting 13.7 no matter what mode I am in 1, 2, 3 or stock. Sure is peppier though. I did this to help my milage, oh well. I do like it alot though, but now I am just running bone stock. No sense in running the programmer mode unless I am pulling something. So that is my experience.
'05 CC 4WD "Duallie" LT Loaded D/A
'94 7.3 Turbo, not PSD Ex-Cab 5 spd "Duallie"
'03 Silverado Ex-Cab 5.3
'66 Ford Short Bed 6/3 on the tree
My '05 LLY was the worst on fuel mileage of the five DMax's so far. Thats one of the reasons its no longer in my signature block.
Maybe its just the year and early EGR, cat, variable vane turbo setup...? The '06 LLY (early LBZ) is better, and its a dually!
2011 Chevrolet Tahoe 5.3L daily driver
- Previous owner of two 1994 6.5L K3500s, '01, '02, and '05 6.6L K2500s, '04 C4500, '06 K3500 dually, '06 K3500 SRW, '09 K3500HD SRW, '05 Denali
- Total GM diesel miles to date : ~950K
check out the predator
2005 2500 D/A Ext. Cab 4x4 SLE LLY- Edge Juice w/Attitude and Predator. KN Cold Air intake, 5" exhaust, Kennedy Boost Stick
Mark, I have a superchips flashpaq that I used for my 265's. It allows you to measure the tire and input increments down to 1/4 inch. I compared the speed to gps afterwards and it seemed to be right on.
I have an 04 Duramax and I bought the Hypertech III programmer. Gas mileage DECREASE on stage 1 and stage 3 (didn't test stage 2). I am sending it back to crutchfield. I am getting 19mpg stock, so I don't want to go down and I only bought it to see if I could get BETTER mpg. The truck is powerful enough stock for me.
2004 Chevy 2500 Ext. Cab Duramax LLY/Allison
Sounds like you need to dial in some more boost with the Hypertech. Lots of black smoke on acceleration or when towing?
2011 Chevrolet Tahoe 5.3L daily driver
- Previous owner of two 1994 6.5L K3500s, '01, '02, and '05 6.6L K2500s, '04 C4500, '06 K3500 dually, '06 K3500 SRW, '09 K3500HD SRW, '05 Denali
- Total GM diesel miles to date : ~950K
I think Mark already knows which direction he needs to go, but...
As for MPG with fuel prices the way that there are, there are a lot of manufacturers making claims (marketing) of big MPG gains. Some see gains with these devices, but in my experience most don't. I learned a long time ago not to make promises on MPG gains as I can't control this. HP is repeatable, but MPG is more tricky. Most of my Custom tuning customers report best ever MPG gains, but again no promises from me.
Kennedy Diesel-owner
More than just a salesman-I use and test the products that I sell on a daily basis!
Superflow Lie Detector in house
2002 Chev K2500HD D/A CC Long LT 11.77@ 124mph at 7700# fuel only-e.t. needs help
2005 Chev K3500SRW D/A CC Long LT(SOLD)
2007 Chev K2500 Classic EC Short LT (Sold)
2012 GMC K3500SRW D/A CC Long LTZ Happy Birthday to me! Built 1 working day after my birthday and delivered 7 days later.
2016 GMC K3500SRW D/A CC short LTZ
Custom tuning in house using EFI Live tuning software!
Kennedy Diesel-owner
More than just a salesman-I use and test the products that I sell on a daily basis!
Superflow Lie Detector in house
2002 Chev K2500HD D/A CC Long LT 11.77@ 124mph at 7700# fuel only-e.t. needs help
2005 Chev K3500SRW D/A CC Long LT(SOLD)
2007 Chev K2500 Classic EC Short LT (Sold)
2012 GMC K3500SRW D/A CC Long LTZ Happy Birthday to me! Built 1 working day after my birthday and delivered 7 days later.
2016 GMC K3500SRW D/A CC short LTZ
Custom tuning in house using EFI Live tuning software!
'03 Chev Duramax ext. cab, Kennedy ECM,After Market turbo,tranny, triple disk convertor, Exhaust Brake, electric tran. cooler, dual exhaust, Supertank 57 gallon.