Hello, Looking for some help, I have a 2005 Chevy Avalanche. Last Nov i remote started my truck and it was in Limp Mode. Seance then I have Taken it to a transmission shop where they went did a road test and looked at the wiring they thought could be causing the problem. I have been looking at the ING 0 fuse and seeing that in the Acc, & on position i will get 12 volts. When i turn the key to start it will drop to 9.2-10.5 volts on start. At this point the trans will going to limp mode. If i restart (sometime more than once) it will come out and run and drive normally. The trans shop scoped the ignition switch and found nothing. I never get a dash light but i do get 3 code. (keep in mind the truck will do this with the key or remote start) the 3 codes i get are: P0470,P0785,P2761.

Anyone have any ideas. Would really like the help.

 

what are you using to retrieve these codes. Service information does not show a diagnostic for any of them for a 05 avalanche. This usually means, the scan tool used to retrieve them is outdated and the users put in a wrong build year.