Anyone have experience with gmt800 trucks?

[AuroraGirl]

The stretch fit belt for the A/C is cake. Just don't do what I did and waste money on the Gates install tool because I couldn't make it fit my crank pulley. A couple zip ties got the job done instead. I converted both our SS's years ago, no issues, and we run the A/C all the time being SE Texas ya know.

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Looked up the belt number using a GMT900 6.0, I wanna say 2009 or 2010 3500. This # fit our 2006 6.0 (LQ9) engines, not sure how universal that will be across the board though. One less tensioner and pulley to go bad = win

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Richard

I wish I had an lq9, but lq4 is acceptable mine is a 05

 

[AuroraGirl]

Another cool thing was I found my factory engine block heater zip tied to where it factory goes, so I untethered it and stuck it out of the recovery hook slots in the bumper. Works

 

[df2x4]

Tried to post an Amazon link but no go.

Yep I've had the same trouble with amazon links here and I thought I'd tried in the past the trick to make them show up but it still didn't work.

FYI guys, if you post Amazon links without the "https://" at the beginning they'll show up as regular text links. If you don't delete the "https://" then they get converted to an image link which most ad-blockers will catch and hide.

 

[99xcss4]

I wish I had an lq9, but lq4 is acceptable

you are closer to a lq9 then you think just a piston swap away and you got your self a lq9 for a lq4 price

 

[99xcss4]

you are closer to a lq9 then you think just a piston swap away and you got your self a lq9 for a lq4 price

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[AuroraGirl]

you are closer to a lq9 then you think just a piston swap away and you got your self a lq9 for a lq4 price

yes, doesnt the PCM technically need a tune to make the best use of the flat top piston? and does torque take a hit?

 

[99xcss4]

I do not know about a tune maybe looking on wikipedia for both lq4 and lq9 shows that depending on year/application lq4 is rated between 300 and 325 horse power and a torque rating between 355 and 380 lq9 is rated 345 horse power and 380 torque I do not know much about ls based engines they are not really my thing I am gen 1 small block as well as mark iv gen v and gen vi big block

 

[movietvet]

yes, doesnt the PCM technically need a tune to make the best use of the flat top piston? and does torque take a hit?

Get ahold of Black Bear Performance and they can answer your questions about the tune.

 

[Sean Buick 76]

With the higher compression pistons you may end up with high octane gas. On my 2012 L-96 6.0 with a cam I run premium as if I run low octane fuel the computer retards the timing making it much slower.

I wouldn’t bother piston swapping a good running engine but I do use Blackbear tunes even on stock engines. I’ve had them tune 5 of my 99-2012 trucks over the years with great results. I typically only do long tube headers, and dual 3” exhaust and leave the engines stock. Several times I’ve done a cam swap and they tuned them all very well.

 

[Erik the Awful]

Instead of swapping pistons, I'd go for a thinner head gasket. My calculator says half a point of compression for $88.

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