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Log commanded vs actual cam position. We are seeing lots of magnets/solenoids going bad at the dealership (chevy) there are tsb's out on it now. You said that you replaced the solenoid but a quick...

Cant see your other log with the knock but I've been working on a C7 with a hell of a knock also. Installed an A and A kit and headers gets a lot of knock up top only. Completely desensitized knock...

I had this same issue a couple of months ago. Drove me nuts. Was tuning a 06 that just had headers put on.

Your issue is in the ecm tune somewhere. I tried to back tune mine-work backwards in...

Thanks for the heads up. Nice to hear that someone else actually uses the picoscope too. Great tool that is underutilized.

Your high speed can bus has an issue. Check ecm power, ground, and serial data lines. The data lines should look similar to pins 6 and 14 on the dlc when they are measured to ground-regular DC...

Don't forget to disable virtual flex fuel in the tune. Any filter/air tract change will skew the algorithm and it will think it has like 37% ethanol and dump in fuel. Could be the reason for your...

I work with these diagrams almost every day at the dealership. I've proven many incorrect schematics- usually wasting my flat rate time...grrrrrr. I just send the info in to engineering and they pass...

Settle down there Shrek. You've been hanging out with Donkey too much! You explained what you were trying to convey very well. Blindquirrel was looking for other info.

Blindsquirrel-I looked into...

They all have there place. I've used all of them and taken bits of each to get an understanding of these systems. My vote if I were to start again would be erm (wish he was still here) buy that...

Agreed with vacuum leak. I'm a long time GM tech and I installed one of these a couple months ago. Torqued manifold bolts to spec twice and used blue loctite. Checked every vacuum line as idle was...

Ended up contacting magnuson support. They were very helpful. They eventually emailed me the file in .hpt format with the disclaimer that their warranty would be voided using the file this way....

There are two different prndl set ups for these trans. One is a four pin and one is a ten pin. I always have to check the data list to see which one it has before I order a new one from parts at my...

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The credit confirmation.screen just won't pop up. I reaynced the rtd device that came with the kit and it states credits added.

The rtd uses another app the rtd flasher so I can't open that in...

Installed a maggy 2300 on l83 yesterday. They supply an mpvi2 device. Was able to get the tune from them and the rtd driver software also. All went well except for when I try to flash the file. It...

Looking at the pin outs....pin 51 is for circuit 5985 accessory wake-up serial data. Pin 66 is main module power and pin 35 is ignition voltage from kr73 main ignition relay. I'm willing to bet that...

I'm also a gm tech. Tell him to try replace and program in sps on all the modules you swapped to the 8 speed vin. See if you can put your actual vin in all the modules you changed. Also see if your...

The vin needs to match in all high speed gm lan bus modules (ecm ,tcm, bcm, sdgcm, hmi...etc) or the vehicle will not start. You could try "replace and program" from TIS on the ecm and tcm like they...

When the ignition is turned off R.A.P. (retained accessory power) stays active and will keep powering several modules and devices in the vehicle. Opening the driver's door opens (turns off the rap...

Are you exiting the fast learn process correctly? This issue can happen of that is not followed correctly. I've done it. I usually complete mine with gds2 but sometimes use sps if I happen to have...

Tcm will be fine, but you will have to program the TUN (transmission unique number) into the tcm. All the flow characteristics of the valve body and clutch flow rates are stored in a cloud and then...

The tsb for fluid exchange is for a shudder from tcc-it works great. There is another tsb or pi for the harsh 1-2 shift that states it is a normal condition. It's caused by some air in the clutch...

We get a A LOT of complaints and no problem found issues at the dealership for 8 speeds. People do not like it when we tell them what they experience is normal operation. There have been so many tcm...

Subtract about an inch from the actual measurement for diameter. Gm does this from the factory. Put new tires on a truck the other day and measured side to side, then up and down with vehicle on...

I'm a GM world class tech at Chevy dealer and I also own one of these trucks. I have almost completely eliminated mine it seems. The issue is from a normal bleed down of the clutch overnight, but...