PRND Flashing

[Newton86]

When I start up my truck parts of the PRNDM flash. Tach and Voltage meter twitch. Service Theft Deterrent system alert comes on. Has anyone had this issue? I am WAYYY out of warranty. Have 125,600 on the truck. Do my oil changes at 5k miles and my transmission services like normal. I have never replaced the battery so I am wondering if it could be low voltage or if I am looking at transmission issues. I have made sure the battery cables are tight. Next will be looking at the starter wires. Just not sure what else to look for. Please help. Thanks!

[silveradosid]

have you done the g218 ground 

[Newton86]

2 minutes ago, silveradosid said:

have you done the g218 ground 

No, what is that? 

[silveradosid]

is it the main ground under the dash by the left hand speaker, search the forum and you will find how to check and clean it. it will cause all sorts of electrical issues. if you havent changed the battery i would have it load tested to make sure it is not the problem

[Newton86]

Thank you! I appreciate the help.