Hmmm… Let me guess… That is one of those eAssist engines?

 

it is !!

 

do you know what engine your truck has?

 

It’s the eassist engine ! What the person mentioned above!

 

Yes it is

 

The square hole (just below side of finger/fingernail in pic) the tensioner arm will fit the square on a rachet.
With the tensioner bolted into place, the rachet can be used to overcome the spring in the tensioner and pivot the tensioner arm so the belt can be put in the correct place before allowing the tensioner to pivot back to tension the belt.

 

We did that that but the belt is super tense only able to stretch a bit but not enough !?

 

Yes it is

 

Unfortunately not. The eAssist engine is pretty rare and hardly anybody on here are familiar with it. Things such as belt routing is completely different from the normal engines in these trucks.

However, if you have the correct tensioner meant for the eAssist engine and it is installed correctly, there should be no issue reinstalling belt. You might need to check and verify your part and installation.

I believe

Unfortunately not. The eAssist engine is pretty rare and hardly anybody on here are familiar with it. Things such as belt routing is completely different from the normal engines in these trucks.

However, if you have the correct tensioner meant for the eAssist engine and it is installed correctly, there should be no issue reinstalling belt. You might need to check and verify your part and installation.

i believe we do have the correct tensioner but I can’t find no video to help ! I was wondering why mine is different from any other !

 

How does the old tensioner compare w the new?
Are you using the original belt?

 

There the exact same tensioner and he’s the original belt

 

Stretch the new belt along with old one side by side and the new belt should/ might be about a 1" shorter.

New tensioner and new belt can be a real PITA. Long handle ratchet and pull. You should feel the tensioner bottom out.

 

It’s the same belt we didn’t replace the belt

 

You either have the belt routed incorrectly or the wrong tensioner. Just because it’s a 5.3L V8 and AutoZone or another box store says it fits, that doesn’t make it correct for your oddball engine. The belt routing is completely different from the 5.3 in ‘16 Sierra. From what I can see though in very few diagrams, it looks much simpler than my engine and pretty straight forward. And your using the same belt so it should stretch/flex much easier than a new belt would

 

It doesn’t work! We def have the same tensioner I will check again but the other ones we bought didn’t fit we had to go on a hunt for it!

 

Guys I figured it out

 

Excellent news! What was it by chance? Inquiring minds want to know lol