GMC Yukon Engine Idle Rough

So I Have The Vehicle Listed Above Denali, It Has Been Sitting About 8 Months Ran Fine When I Left It There But Anyways. I Tried To Crank It...

The Suv Listed Above Was Given To Me Because They Though It Had A Blown Head Gasket. There Was No Water In Oil, Oil In Water Or Smoking So I...

When I First Start The Suv Whether Cold Or Warmed Up The Rpms Jump Form 300 To 500 For A Few Minutes. Once The Engine Is Warn No Problems...

Had Bad Misfire Was On Multiple Cylinders. Replaced Plugs And Wires. Did It Again. Replaced Fuel Pump And Regulator. Idle Was Better. Then...

I Have Changed Spark Plugs And Wires Myself. I Took Yukon To Mechanic And He Confirmed My Work Good. He Tested And It Would Give A Misfire...

2002 Gmc Yukon, 5.3 , When The Ambient Temperature Drops Below Freezing My Idle Is Very Irregular, Almost Dying, Until The Motor Warms Up....

Then Once Started 2-3 Minutes And It Runs Smooth And Quiet. This Only Happens The First Start Of The Day. Today The Check Engine Light Has...

My 99 Yukon Is Idling Rough About 500 Rpm? I Think Is Not Timed Right

Solved!!! The Intake Manifold Gasket Was Bad. Replaced Them And Runs Fine In Cold Weather. Gm Is Aware Since They Issued A Tsb About It...

Installed New Intake Gasket, Along With A Few Other Gaskets On 1995 5.7l Yukon. Engine Has Very Rough Idle , Pings Under Load. Possibly Egr?