GMC P CODES (POWERTRAIN) P0300 - P0399

This Vehicle Had The Distributor Replaced By A G.M. Dealership, Due To The Cap And Rotor Melting. Every Since Then When The Vehicle Is...

01 6.0 In A Yukon Xl. Cyl #2 Misfiring. Parts Changed/checked ; Head Gaskets, With Valve Job. Coil. Plug Wire. Plug. Injector. Fuel Psi Reg...

Truck Is Running Lean, But Drives Good. Starts Acting Up When I Am Going Slow And In Idle But Not All The Time. I Have Replaced Fuel Tank...

Just Replaced Head And Did Complete Tune Up And Don"t Know Where To Go Next? Car Has Random Misfires On Idle Updated 2-5-09 Already Did...

My 1999 Jimmy Is Giving A Po 300 Code It Runs Very Rough. Has New Cap And Rotor, The Plugs And Wires Are Less Than A Year Old. Used A Cigar...

Misfire, Check Engine Light.

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 Have The Vehicle Listed Above Slt Model. My Car Wants To Overheat When I Go On The Freeway Or Up Any Hills. Feels Sluggish. I Took It To...

Hello, After A Week Of Diagnosis, The Problem Gets Worse. At First, I Had A P0171 That Was Related To A Vacuum Loss, So I Replaced...

I Posted A Forum About A Month Ago Of A Ticking Sound Coming From My Engine. I Took It To My Dealership, And They Fixed The Issue. They...