GMC SUBURBAN TROUBLE CODE

I Am Getting Code P1404 Egr Pintle Valve Stuck Open, I Replaced The Egr Valve, And After 20 Miles Driving It, The Same Code Came Back...

My 99 Gmc Suburban With A 7.4l Engine Has A Issue Where It Won't Start Intermittently. It Will Crank But Won't Start. The Error Code I Get...

I Have Problem In My Car Gmc Suburban 1999 7.4l Code/p0507 Lighting Check Engine Engine Hard Start How To Fix? Help Me

Engine Performance Problem 1998 Gmc Suburban V8 I Get An Error Code P1345 On My Suburban Do You Have Any Information?

I've Replaced The Valve Stem Seals, Plugs, Wires, Cap, Rotor, Cpi Fuel Injector Unit And It Still Runs Rough When It's Cold And Idling...

I Shorted The Ab Terminals, And Got Codes 23 And 43, 23 Is Suppose To Be Mat Sensor, Could You Tell Me Or Send A Pic Of Where This Is...