Huge hesitation, mechanically inclined. Please help

[Brian Wilson]

Thanks for the help. But which new part ....

 

[ISU-152]

You've done a ton and it sucks I know. Try cleaning your egr valve.

 

[Brian Wilson]

Adding it to the list. I should have it all done this weekend easily

 

[Brian Wilson]

Just took the plunge for the 600$ v2 from blackbear. Hopefully they can give me a tune that will solve my issue or at least point me in the right direction about the problem. Still super excited to get it.

 

[iamdub]

Try to get some details if BB sees something and you get this sorted out. I have an '08 5.3 (AFM, no VVT) that seems like it should have much more lower-RPM power than it does. It's like VTEC kicks in around 4,500 or so. Although, this is my first of this type of vehicle so it may be perfectly fine and normal.

 

[Brian Wilson]

I would be of no help. I hate everything about my car except the 6 speed and the 6.2. If they sold a base tahoe with a 6.2 6 speed package and a hitch, I would have gladly bought that instead. All those wonderful electronics are just more trouble later.

 

[Tonyrodz]

I would be of no help. I hate everything about my car except the 6 speed and the 6.2. If they sold a base tahoe with a 6.2 6 speed package and a hitch, I would have gladly bought that instead. All those wonderful electronics are just more trouble later.

Hell yeah! !

 

[Da90]

Glad I saw this! My 08 Sierra Denali has done this twice. It happened today... I have the auto cal but I'm chasing high and low codes. I found the service bulletin but haven't tracked down the problem yet.

Edit: high and low voltage codes
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[Brian Wilson]

High and low codes? Never heard of this

 

[Da90]

High and low codes? Never heard of this

http://repairdata.cnlaunch.com/pdf/2013/09/25/91ba623e-0f70-4621-9342-f4c7d469e48a.pdf

I had to edit my original post cause I left out a word.

That is what I found and my buddy at the dealer said the same thing. I'll be driving and all the electronics will shut off and come right back on. The motor has shut off once that I can positively remember. I have a code reader and it throws both the codes in the link. I have replaced the main fuse and and cleaned the easy terminals. I'm thinking next is battery and alternator cables.


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