GMC C1500 Trouble Codes

This Truck Has Had The Computer Replaced With A New One(same Prom) And It Still Doz This: High Idle,pinging,dies Check Engine Light Is On...

My Truck Started Making A Loud Screeching Sound When I Start It Up. After Awhile It Will Stop.and When I Let It Rest It Will Do It Again....

Do You Have A Drawing Showing The Luberication Points

I Have A 2003 Gmc Sierra 1500 2wd 4.8 And Im Having Trouble With Shifting. Its An Automatic 4speed. I Can Not Get It To Shift Into 3rd Gear...

I Have A 1997 Gmc 1500 With A 5.7 L Vortec And I Keep Getting Dtc's P0172 And P0175. I Have Replaced The Mass Airflow Sensors Twice, New...