5.3 Vortec AC - How to correctly setup a Chevy compressor to stock 60?

[dbbowen]

What year

2004 Silverado 1500 DBW

No. Worked fine. Mine was a 2003 LM7 drive by cable

Ah, i am using DBW

 

[MrFitzie]

When I was hooking up my AC to operate like the GM factory system I referenced the diagrams and information on this page Upgrading to Gen III LS-Series PCM: Air Conditioning Guide, since you have a 2004 it looks like if you want to wire it up like factory you will need the HVAC control module. Unfortunately in all the swaps I have done I have only dealt with the 99-02 setups or the crate engine harness.

Before I did the wiring like factory, I did just run the Toyota +12v compressor signal to the compressor like many others have said. Besides a slight idle dip right as the compressor kicked in the engine did sense the additional load and restore idle. So you can always try this first to see how it affects your setup to see if it is acceptable or not.

 

[dbbowen]

When I was hooking up my AC to operate like the GM factory system I referenced the diagrams and information on this page Upgrading to Gen III LS-Series PCM: Air Conditioning Guide, since you have a 2004 it looks like if you want to wire it up like factory you will need the HVAC control module. Unfortunately in all the swaps I have done I have only dealt with the 99-02 setups or the crate engine harness.

Before I did the wiring like factory, I did just run the Toyota +12v compressor signal to the compressor like many others have said. Besides a slight idle dip right as the compressor kicked in the engine did sense the additional load and restore idle. So you can always try this first to see how it affects your setup to see if it is acceptable or not.

wow thank you so much. That is incredibly helpful. Ill look into the module, but if all else fails just put the Toyota 12v to it thanks again!

 

[orion]

Same with mine - Idle is steady, AC on or off. 2001 LR4 motor (4.8L, drive by cable)

- Brian