LS OEM Accessory Drive Questions

[Modges'66]

I am under the impression that GM makes 3 different offset accessory drive set-ups for the LS engine.
A short set-up (close to the engine) for Corvette/Cadillac CTS-V, a mid set-up if you will (3/4" increased distance from engine) for F-Body & GTO, and a long Set-up (1.5" increased distance from engine) for the trucks.

My questions are:
Which offset set-up does the Caprice use?
Which offset set-up does the Trailblazer SS use?

I am trying to determine if the Caprice or GTO uses the same accessory drive set-up as the Trailblazer SS, as they both have a A/C bracket that incorporates both an idler pulley and a tensioner pulley, where the TBSS only has a tensioner pulley.

I constantly throw the A/C belt on my TBSS during hard 1-2 shifts, and have read that this is why GM added the idler pulley to the newer A/C brackets.
the GM part No. to the newer improved bracket for the Caprice that I am referring to is #92252927.
I have no idea what the bracket part# for the GTO is...

Any insight on this issue would be greatly appreciated!

[dayj1]

Originally Posted by Modges'66

I am under the impression that GM makes 3 different offset accessory drive set-ups for the LS engine.
A short set-up (close to the engine) for Corvette/Cadillac CTS-V, a mid set-up if you will (3/4" increased distance from engine) for F-Body & GTO, and a long Set-up (1.5" increased distance from engine) for the trucks.

My questions are:
Which offset set-up does the Caprice use?
Which offset set-up does the Trailblazer SS use?

I am trying to determine if the Caprice or GTO uses the same accessory drive set-up as the Trailblazer SS, as they both have a A/C bracket that incorporates both an idler pulley and a tensioner pulley, where the TBSS only has a tensioner pulley.

I constantly throw the A/C belt on my TBSS during hard 1-2 shifts, and have read that this is why GM added the idler pulley to the newer A/C brackets.
the GM part No. to the newer improved bracket for the Caprice that I am referring to is #92252927.
I have no idea what the bracket part# for the GTO is...

Any insight on this issue would be greatly appreciated!

The TBSS uses the truck belt spacing. I wasn't sure about the Caprice, but I looked up the balancer part number and it matches the Corvette one. So, I'd say Corvette spacing on that one.

[Modges'66]

Originally Posted by dayj1

The TBSS uses the truck belt spacing. I wasn't sure about the Caprice, but I looked up the balancer part number and it matches the Corvette one. So, I'd say Corvette spacing on that one.

Wow, I really appreciate the quick response!...But not necessarily the answer. LOL!
It seems as though I will need to try to find an alternative cure to my A/C belt throwing problems. Any ideas are welcome!

[NC_John]

Originally Posted by Modges'66

Wow, I really appreciate the quick response!...But not necessarily the answer. LOL!
It seems as though I will need to try to find an alternative cure to my A/C belt throwing problems. Any ideas are welcome!

I don't know if or how well this works but I am keeping it in mind for my 6.0/T56 build currently in progress. (And you said you are throwing the AC belt? The little secondary belt?)

http://www.tickperformance.com/katec...elt-tensioner/

[Modges'66]

Originally Posted by NC_John

I don't know if or how well this works but I am keeping it in mind for my 6.0/T56 build currently in progress. (And you said you are throwing the AC belt? The little secondary belt?)

http://www.tickperformance.com/katec...elt-tensioner/

Yes, I am throwing the little secondary belt, but if it happens to get caught in the main belt, everything gets wrapped-up!
The tensioner that you showed is for the main serpentine belt...not much help with this.

After the 1st time that this happened, I replaced the tensioner for the secondary belt thinking that this would cure my problems, but it didn't.
Now I have read that the spring force in the aftermarket tensioners isn't great enough....So, I don't know what to believe.

I do know that I just put a new motor in this vehicle with very good cam & top of the line valve train, then broke-in the motor properly for 5000 mi. added A CAI, & LS7 MAF, and had it tuned, but I cant even get on it good without throwing the A/C belt...
If I back out of it for the 1-2 shift all is good, but how much fun is that?

[NC_John]

Originally Posted by Modges'66

Yes, I am throwing the little secondary belt, but if it happens to get caught in the main belt, everything gets wrapped-up!
The tensioner that you showed is for the main serpentine belt...not much help with this.

After the 1st time that this happened, I replaced the tensioner for the secondary belt thinking that this would cure my problems, but it didn't.
Now I have read that the spring force in the aftermarket tensioners isn't great enough....So, I don't know what to believe.

I do know that I just put a new motor in this vehicle with very good cam & top of the line valve train, then broke-in the motor properly for 5000 mi. added A CAI, & LS7 MAF, and had it tuned, but I cant even get on it good without throwing the A/C belt...
If I back out of it for the 1-2 shift all is good, but how much fun is that?

I am relocating the compressor on mine up top to clear my frame and in doing so ditch the secondary belt and can run the Katech part. Might be your only option.

[ls1nova71]

I get the feeling this is a new problem, since the new engine was installed? The TBSS engine uses the same compressor bracket as the trucks do and I have never heard of anyone having problems throwing that belt, so to me it almost sounds like something is misaligned. I would double check that everything is straight and tight. Does the crank pulley wobble any at all?