I got my 99 jimmy 2d 4x4 stuck in a big mud puddle, the water was up to the rockers, minor water sitting on my driver side floor, and nowhere else. i finally got the vehicle towed out of the hole after about 12-14 hours of sitting. i started it up, water poured out of the exhaust for about 5-10 seconds and i let it idle a bit. it seems to drive just fine except now the gear selection indicator on the dashboard doesnt display any gears other than reverse and 3. it wont light up on P N D 2 or 1. The other thing ive noticed so far is intermittently when i am at a stop it will idle really rough when i am in drive or reverse and stopped. once in a while my gear selection indicator will click back on and it will show me what gear im in but both problems are intermittent. Since pulling it out of the water I have driven around 30 trouble free miles with exception to the problems i listed above until the check engine light came on. I pulled 4 codes P0300, P0131, P0171, P1133. I cleared all of the codes and have driven roughly 10 miles and have no check engine light so far (yet) any ideas on where i should look in order to inquire about the rough idle or the gear selection indicator? is there a control module mounted somewhere on the transmission for that? this is my first blazer/jimmy and i am very new to chevys in general. I have an audi and it has a million control modules for everything you can possibly imagine so i dont know what im facing is all. any advice is very much appreciated.

Thanks
Justin

 

https://blazerforum.com/forum/diagno...4-5-6-a-35153/
https://blazerforum.com/forum/diagno...plained-30416/
https://blazerforum.com/forum/diagno...plained-35154/
https://blazerforum.com/forum/diagno...plained-30095/

Here ya go these should help

Search would take you somewhere on here =)

 

the gear indicator probably has something to do with the range switch on the side of the transmission. it may have gotten water in the connector

 

i will look into the range switch connector/unit asap. i am having trouble finding anything about it online, even a picture of the part. i am working to acquire a GM parts software program to maybe help, unless anyone here knows the part number for the trans range switch, or what its name is.