When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
So still battling this po60d code. Lq4/th400 vvt intact but disabled through the tune...took truck back to tuner, he said everything is good. So thought for sure it was a bad j connector at ecm because it wouldn't latch securely and broke the tabs off......so after buying s completely new harness from psi I still get the po60d code the exact same way as before?. All my other codes have cleared up.... now I'm thinking of deleting vvt all together... so with the vvt turned off in tune can I just buy a vvt delete kit? Or do I gotta swap a new cam too? Can I just shim the vvt from moving? I've read about it on forums but can't find any in depth discussions on it?
Idk what else it could be, I replaced the pedal, throttle body, new wireing harness, new ecm.. I've been told that it could be the tune or could be from vvt being intact but just turned off.
So I'm thinking if I put new cam and eliminate vvt all together and get a new tune, I can fix the issue? Trying to figure out what are my options at this point. Tuner said to bring it back to take a look
Did you not read the original post? Tried new pedal. Tried new pedal wireing pigtail before changing our the entire harness....I'm just goin off what another shop told me. I can cruise the truck around town all day with no issues but afywr about 10 mins of me getting on it with rpms around 3k chopping the throttle and laying back into it, it will throw the code. But just cruising around town no problems at all.
I went through all these common causes, new throttle body, new pedal, i was thinking the vvt will engage or something from the load and cause the timing to change, and making the program error.
ses.
What year model is the engine, harness, and what year model is the pcm. Is it programmed for the vin out of the donor vehicle the engine originated in. Is it programmed with a 6.0 base vin or something else and just modified tune to run the 6.0
If you can post the vin the pcm is flashed to would also help and the service number on the rear of the pcm.
If the engine is a LQ4 6.0 they are not equipped with VVT or DOD
Need some more background to verify it's not a frankenstein problem.
2011 2500hd 6.0, matching pcm, i bought used pcm to replace one with broken tabs. Matched up the order/work/serial number(I think that's what it's called) harness is from psi. Chucks speed shop did live custom tune on a dyno, vvt is disabled but still intact with only cam senor plug. Th400 trans. Been in contact with tuner and will be bringing it by in couple weeks to look at tune. It always throws the code when i let off gas and get back on it. Except when I go to get on gas there's nothing except the p060d. Does it same time at same place where I know i can get it to replicate every time.
It even did it with original pcm. I got the motor,pcm and customs harness from pacific fabrication. I've been dealing with it for years now but truck was always more rock crawler then anything and didn't happen very often now it's being cruised more frequent on dirt roads and snow so I'm noticing it more and starting to get very annoying.
If pacific fab mixed up pedal/ecm. Do I just need to match pedal and ecm? Or do I gotta do throttle body too? I've replaced pedal and ecm but only with what they gave me when I originally purchased the motor package assuming they did it right?
I don't think it's a lq4 after doing more reading and it definitely has a vvt that's why I had to get live tune on dyno after doing more research I found it might be ly6? I'm goin to look up.numbers on block. Has 823 heads.
I have no access to any software yet. I just have a Bluetooth code reader using the torque app. But after I take to tuner and if we can't get it figured out. I'll be getting the necessary software to beable to share data. What would you recommend?
Is the pedal, and throttle body and pedal harness you just put in ordered for a 2011 2500 HD with a 6.0. Are they new GM parts or parts house stuff.
Some of those code readers will let you read that information but its in an area labeled weird maybe look for calibration, ID information emissions readiness infor or somewhere like that.
For your peace of mind the problem you are fighting is not VVT related it's a throttle system problem.
I'm leaning towards a mismatched component or somebody tampered around with several tables in the throttle system got some numbers outtawhack and they shouldn't have.
I'll be in n outta here several times before bed time later gotta get kids bathed fed watered and in bed. wish they just had a off switch for bedtime
Last edited by 01WS6/tamu; Jan 27, 2025 at 08:31 PM.
Ya there not oem stuff. And ya I'm thinking it is something in the tune. I just figured it was vvt related since that what I heard from couple people. But I'd think if it was something with the parts, it would throw the code at a different time. But it does it at same time it always has. Seems to be after certain time and I let off after a certain rpm it will throw a code.
Ok so they aren't oem factory that may not be a problem at all. Are they aftermarket speed parts or are they from oreillys AutoZone, carquest etc or sourced from a boneyard and dunnot what they fit.
Can you line item tb, pedal and pcm brand for each and what vehicle its for on each item. example below
TB 2011 HD gm and part number
pcm 2011 HD and what it's base program is if you can get vin outta the pcm thats gold.
pedal 2011 vette oreillys and part number
The important part is that the pedal, throttle body pcm and tune in the pcm are designed to work together and they do so hand in hand by the pcm expecting to see exact data at exact data points. The TAC system is very very picky on this.
So lets say it's actually got a 2011 HD tune in the proper PCM for a 2011 HD then it must have a 2011 truck throttle body and pedal. If it has a car pedal or aftermarket TB then when it's analyzing data coming back it says nope and flags a DTC.
Or if it is verified 100 percent 2011 truck tune, truck pedal, truck TB then id be looking at TAC tables for something somebody tinkered with
Or if it's a 5.3 tune with 6.0 stuff pasted over all 5.3 stuff then theres things that need to be left alone in the TAC tables to prevent problems again in the tune.
But Bar none the hardware is gotta be verified to be the correct hardware the pcm is expecting to be working with.
You are fighting a frankenstein parts problem I fear and those are tricky to get all sorted out.
Last edited by 01WS6/tamu; Jan 28, 2025 at 10:28 PM.
Ok just got back on here havnt had a chance to mess with truck til today and get back look back into this. Ill get verified part numbers for you. Goin to get the tuner to tell me what the motor came out of. And see if i can get part number off thrttole body. I appreciate this. Here's what I did today on a long test drive. I ended up throwing the a p0690 code, so I went back out to do multiple test hits. I only got it to throw the the p0690 code 1 other time. It was the first time along with the p060d code. After that I did another 4 passes and got it to throw the p060d code but NEVER got it to throw the p0690 code again. Then drove home slow and casual with no problems. Seems to be problem when reving continuously over 3500 rpms. Also noticed the ignition relay on fuse block gets pretty warm. I can hold my finger on it. But I could almost say it's hot. Also I've never had the speed spensor code come up as a current fault in red. It's usually pending. And never was red or current etheir again after the po690 code never came back. Also to the p0113 code always shows up as a historical fault? Not sure why. And speed sensor wasn't used during intial tune, but later turned it on trying to fix the p060d code which didn't work and had no effect on the p060d code. The new harness won't reach the snesor and goin tonorder an extension.
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.
Still battling p060d code 
