05 Trailblazer stalls sometimes with AC on

[1987 mustang]

On a few occasions my trailblazer has stalled at a stop light or sitting in traffic. It seems that the idle drops to low with AC on. But not often only sometimes. Always starts back up and runs fine. Has anyone had the same issue?

 

[gmcman]

Nope.....you're the only one with this issue.

Welcome to the Nation! I would try cleaning the TB and make sure you get both sides. There are a few articles on this process and I would perform a TB relearn afterwards. Pull fuse #10 instead of disconnecting the battery and if that works then you should be fine.

 

[The_Roadie]

Welcome! Absolutely classic problem we have the $5 fix for. Dealers have ripped people off for hundreds of dollars installing replacement throttle bodies when they don't understand the physics of the issue like we do.

GMTNation - How to Clean an 4.2 Inline 6 Throttle Body

 

[signalnc]

and make sure you do the re-learn after you clean it.