GMC P CODES (POWERTRAIN)

My Engine Was Fixed. I Believe They Played With The Timing Chain And Now I Have Those Two Codes.

I Bought The Truck Listed Above Used And Within A Few Months The Check Engine Light Came On. I Pulled The Codes And They Were P0499 And...

As The Tittle Says. I Get A Lean Code P0171 But Only If I Use 87 Octane. I Verified This By Filling The Tank 3/4 Of The Way With 89 And...

Since My Last Conversation With You Guys I Atleast Got My 99 Gmc Jimmy Where It No Longer Dies Out Anymore, Thank You. Now I Am Having...

I Have Replaced Almost Everything. Recently Was The O2 Sensor For One Code And The Fuel Rail Sensor For The Other Code.

Please Tell Me What These Codes Stand For And The Diagnosis.

Code Came Up. Had All Four Replaced In December 2017. Could The Sensors Gone Bad Already?

I Was Wondering If A Pcm Would Work If Engine Code Is Different? I'm Swapping Motors On My Vehicle Listed Above And This Code Is W The...

I Have The Truck Listed Above. It Started Sputtering, Hesitating, Not Shifting Right Like It Had Bad Gas. We Went To O Reilly's, And...

Wasrunning Rough And Had Dtc P0101and P0300. Tuned It Up And Replaced Massair Flow. Cleared Codes. Started Van Cel Started Flashing Has Same...