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06 Sierra VotecMax studders

Cinder01

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Cinder01 Enthusiast

Cinder01

Posted
Posted

I've had this problem since I bought the truck. I'm more curious if anyone has ever seen/heard of it. Now the problem when I accelerate lightly the truck studders/stumbles. It's like it's stalling RPM drop out and jump back. I find the tranny shifts really hard when step on it and at highway speeds it'll start the stumble again. I have an edge CS in the truck and have noticed the stumble is always at 27% absolute throttle position. There are no trouble codes that come up. And I even had a GM mechanic (friend of mine) come for a ride with the scanner on it and nothing came up unusual. Any ideas? I'm hoping to find a used throttle body and try changing that but not easy to find here.

anumber1 Enthusiast

anumber1

Posted
Posted

I chased this problem in my 99 for months.

 

After replacing the MAF, I finally cured it.

 

It never threw a code but ran just as you describe.

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