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I have a 1995 chevy silverado c 1500 idle air control valve need wiring diagram.
1999 Chevrolet Silverado 1500

I have a 1995 Chevy Silverado c 1500 idle air control valve need wiring diagram.

(1999 Chevrolet Silverado 1500)
My truck runs fine when it's cold once it gets warmed up it won't idle right and it runs real rough. I'm getting code 32 35 44. Replace map sensor EGR valve IAC my truck is still running lean. I need the wiring diagram for the plug that goes on the IAC
How long have you had this problem? A month
Tags: chevrolet, silverado 1500
2 answers & 3 comments
Popular Answer
on January 31, 2019
Can’t determine which year model the truck is - there are conflicting years posted.

IF 1995 - the throttle body to manifold gaskets are prone to splitting and allowing air to be drawn into the intake directly - Alonso know as a VACUUM LEAK.
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on January 31, 2019

According to the DTC’s posted - must be 1995.
on January 31, 2019

I just remembered another possibility for this vehicle - stuck open EGR valve - lightly tapping with small hammer or like tool with engine on may help - IF idle speed responds > REPLACE EGR VALVE.
on January 31, 2019

After engine has reached operating temperature - IF EGR valve is always extremely HOT to the touch > REPLACE EGR VALVE.
General Diagnosis
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on January 31, 2019
Can’t determine which year model the truck is - there are conflicting years posted.

IF 1995 - the throttle body to manifold gaskets are prone to splitting and allowing air to be drawn into the intake directly - Alonso know as a VACUUM LEAK.
Sign in to reply
on January 31, 2019

According to the DTC’s posted - must be 1995.
on January 31, 2019

I just remembered another possibility for this vehicle - stuck open EGR valve - lightly tapping with small hammer or like tool with engine on may help - IF idle speed responds > REPLACE EGR VALVE.
on January 31, 2019

After engine has reached operating temperature - IF EGR valve is always extremely HOT to the touch > REPLACE EGR VALVE.
on January 31, 2019
Hello, your idle air control valve is not likely to cause a lean running condition. For wiring diagrams, you will need to obtain shop manual information, and can do so via multiple sources, including www.alldatadiy.com. I would recommend a professional diagnostic test with someone well experienced with OBD I vehicles, especially General Motors.
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