GMC Other Engine Idle High

1989 Gms Z71 4x4 5.7 Automatic. Turns Over A Lot Before Start When Cold, Occasional Puff Of Fuel Smoke From Tailpipe When It Starts. Idle...

I Have A 1993 V6 4.3 Gmc 1/2 ,when The Truck Is First Started The Engine Idles Up Real High Then Real Low Almost Dies, About Few Mins...

1994 Camaro, Automatic, 3.4 Engine, 130,000 Miles When Starting My Camaro It Idles At 2,000 Rpm And Slowly Raises To 2,500 Where It Levels...

I Have A Pontiac Grand Am And I Need Some Help With The Idle System Because The Engine Stays A High Idle. It Started Last Night After I...