GMC C2500 TROUBLE CODE

I Have No Clue What The Code 85 - Prom Error Means, The Truck Has An Intermittent Misfire, It Rev's Up At Times And Stalls At Others, I...

Electrical Problem 1993 Gmc C2500 V8 Two Wheel Drive Automatic My Van Started Doing Weird Shifting And Sometimes Stays Stuck In Second...

Have 1996 Gmc Pickup Sierra 2500 4x4, 5.7 Liter. Trouble Code P1345. Mechanic Replaced Distributor, Crankshaft Sensor, Plug Wires, Coil...

I Need Some Help! I Have A 2001 Chevrolet 6.0. I Get A Code P0307 Which Is #7 Cylinder Misfire, I Have Changed Plugs, Wires Coil, Fuel...

The Truck Has Had The Check Engine Light On For A Long Time But Was Running Fine. Now The Idle Is Rough, It Runs Rough, The Gas Mileage Is...

Please Help Me About This Coad Thanks.

Code P0507 "rpm's Too High" Tested The Idle Circuit For Resistance And Was Well Within The Guidlines. (55 Ohms) Sometimes The Idle Will Drop...