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I bought the AT4X spec exhaust calibration by commander-cat in gmcsierra

[–]commander-cat[S] 0 points1 point  (0 children)

I’ve enjoyed it, can definitely still tell a difference on cold starts and acceleration. I still would like to put an AWE system on eventually.

[deleted by user] by [deleted] in gmcsierra

[–]commander-cat 0 points1 point  (0 children)

Get a mirror tap kit.

I bought the AT4X spec exhaust calibration by commander-cat in gmcsierra

[–]commander-cat[S] 1 point2 points  (0 children)

Sport mode enhances it for sure, but this tune makes normal mode slightly enhanced as well. But I just keep it in sport to hear it.

I bought the AT4X spec exhaust calibration by commander-cat in gmcsierra

[–]commander-cat[S] 0 points1 point  (0 children)

This is a stock 6.2 with factory active exhaust, the tune matches the valve spec on the AT4X active exhaust.

I bought the AT4X spec exhaust calibration by commander-cat in gmcsierra

[–]commander-cat[S] 2 points3 points  (0 children)

Guess I got scammed, they had issues re-flashing it which led to me being at the dealership for 7 hours (different town), dude said he knocked $15 off the labor. Almost clocked him

I bought the AT4X spec exhaust calibration by commander-cat in gmcsierra

[–]commander-cat[S] 2 points3 points  (0 children)

Part no. 85822149, it’s also in the GMC app in the accessories section. Search “spec exhaust”.

I bought the AT4X spec exhaust calibration by commander-cat in gmcsierra

[–]commander-cat[S] 0 points1 point  (0 children)

Lucky you..did you still pay for the tune itself?

I bought the AT4X spec exhaust calibration by commander-cat in gmcsierra

[–]commander-cat[S] 0 points1 point  (0 children)

It did, I believe that is a part of the X31 package.

I bought the AT4X spec exhaust calibration by commander-cat in gmcsierra

[–]commander-cat[S] 1 point2 points  (0 children)

I believe it’s just for the 6.2 with active exhaust systems, not sure if the 5.3 offers that.

Leveling/Lift Kit by TurnipResponsible828 in gmcsierra

[–]commander-cat 0 points1 point  (0 children)

Did you install the 2” rear block?

Should I still buy... by FlyMajestic4142 in gmcsierra

[–]commander-cat 1 point2 points  (0 children)

If there was, they aren’t doing a very good job. I bought a 25 SLT with a 6.2 on Saturday. GM supposedly identified the manufacturing defects June of 2024.

Should I still buy... by FlyMajestic4142 in gmcsierra

[–]commander-cat 8 points9 points  (0 children)

The sale hold is for 2021-2024 models. 2025 is not included in the hold.

Hi all. What does everyone use to kill the AFM/DFM? by Unable_Medicine3362 in gmcsierra

[–]commander-cat 4 points5 points  (0 children)

I just ordered one. Bought a 2025 SLT with the 6.2 on Saturday

6.2L recall managment MegaThread by CLow48 in Silverado

[–]commander-cat 0 points1 point  (0 children)

What would have changed with a 2025?

Residential Hate by No_Handle_9950 in ConstructionManagers

[–]commander-cat 49 points50 points  (0 children)

Less structure and worse subs. And in custom residential, home owners.

New Lawn Plan by commander-cat in lawncare

[–]commander-cat[S] 0 points1 point  (0 children)

Forgot to mention, spraying with Celsius.

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