1500 Silverado transmission problems

[sirdiealot]

Ok so I changed out the 2/3 shift solenoid as it was bad and codes were coming up p0758.

that cured my problem of not shifting into third. Took it for a test drive shifted into third but had to let off gas to get it to do that . Speeded up and would not go into overdrive . Looked up at dash and my tow /haul light was not on. Pushed the button to turn it on and nothing. Light wont Come on . Will double check that Again tomorrow. Went back home after prob a 1 1/3 mile drive . No check engine light but grabbed the laptop anyway and checked for codes and nothing . What could possibly be wrong now lol . Is it something in the tow hail or another solenoid? 

[KARNUT]

5 hours ago, sirdiealot said:

Ok so I changed out the 2/3 shift solenoid as it was bad and codes were coming up p0758.

that cured my problem of not shifting into third. Took it for a test drive shifted into third but had to let off gas to get it to do that . Speeded up and would not go into overdrive . Looked up at dash and my tow /haul light was not on. Pushed the button to turn it on and nothing. Light wont Come on . Will double check that Again tomorrow. Went back home after prob a 1 1/3 mile drive . No check engine light but grabbed the laptop anyway and checked for codes and nothing . What could possibly be wrong now lol . Is it something in the tow hail or another solenoid? 

Probably not related. Basically just to show how weird the electrics can be on these trucks and how they effect the transmission. A year ago for about a week sometimes when I started my truck the tow haul light would randomly be on. And so would be the tow haul function. Couldn’t turn it off. At the end of that week the truck wouldn’t start. Replaced the battery, problem was gone. Nothing weird since. 

[sirdiealot]

I found 2 wires from the gear shift for the tow haul switch that were broken fixed them but still won’t shift into overdrive . Was searching for answers on the web and read some stuff about transmission fuse . I can’t find a transmission fuse on mine anywhere . Is there one on it ? If so where is it ? 

[swathdiver]

On 7/13/2022 at 6:21 PM, sirdiealot said:

I found 2 wires from the gear shift for the tow haul switch that were broken fixed them but still won’t shift into overdrive . Was searching for answers on the web and read some stuff about transmission fuse . I can’t find a transmission fuse on mine anywhere . Is there one on it ? If so where is it ? 

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