Traditional scanners display the codes obd-ii made things much simpler. The OBD-II DTC codes here generally apply to all OBD-II GM vehicles from 1996 and newer: GMC, Chevrolet, Buick, Cadillac, and former brands Oldsmobile, Pontiac, and Saturn. Note, there are a number of computers in your truck (10+), and cheap scanners will only read one, then as you get into more expensive ones, they'll add a couple more (ABS, airbags, transmission), and perhaps live data, then more expensive ones will read codes from all the computers in your truck and also perform a variety of diagnostic and repair procedures. Here’s what you’ll need to do: Make sure your car is parked in a level area, then pop open the hood. The General Motors Enhanced OBD II software upgrade enables access to manufacturer-specific diagnostic trouble codes using your Dyno-Scan for Windows software. Find and Short terminals with a paper clip. After that, a 16 pin ALDL connector was used. Diagnose your car’s engine problems in English, French and Spanish with this CAN OBDII code reader. The ECM (computer) will display a "code 12" by flashing the "service engine soon" light, indicating that the system is operating. Turn your truck's ignition to the "on" (not start) position. Then start the vehicle and follow the auto code reading procedure in the Just as my luck is, I get in my car to drive to AutoZone and the light turns off on my way there. How to read obd2 codes without scanner gmc
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