started running rough out of nowhere?

2004 PONTIAC GRAND AM
190,000 MILES • 3.4L • V6 • 2WD • AUTOMATIC
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R$R
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My car listed above started driving rough out nowhere. It seemed like it wasn't shifting properly and my speedometer stopped work I still had all other gages working just fine so I parked it for a bit and had it towed to my house about a month after it happened and replaced the PCV check valve and line going from the crank shaft to the intake and I replaced the PCV solenoid as well and went to test drive it and it was stuck in 2nd gear and wouldn't shift out of 2nd gear. There's no trouble codes or worry lights on at all. I tested the alternator, and it was keeping consistent voltage. Is there any way you could send me the repair manual pdf?
Nov 5, 2024 at 7:07 AM
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STRAILER
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If the speedometer stops working the transmission will not shift gears, 9 times out of 10 it will be the VSS (vehicle speed sensor), here is the location so you can change it out. They call it an output shaft speed sensor, but it is the same thing. Check out the images (below). Please let us know what happens.

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Nov 5, 2024 at 1:15 PM
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R$R
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Well, I actually did replace the output speed sensor about 10 months ago because I was replacing the wheel speed sensors and figured why not but I didn't know the transmission won't shift when the speedometer not working. Is there any sensors or fuses for the speedometer?
Nov 5, 2024 at 1:24 PM
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R$R
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I replaced the wheel speed sensors because I had the ABS and traction control lights on.
Nov 5, 2024 at 1:25 PM
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STRAILER
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The new output speed sensor can be defective but here are the fuses and ground I would check for the instrument cluster. This guide can help you check for power and ground:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Check out the images (below). Please let us know what happens.
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Nov 6, 2024 at 9:22 AM
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R$R
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That's what i was think after i sent that lol. I'll let you know when i figure something out. I appreciate it! Is there any way I could get a pdf of the repair manual?
Nov 6, 2024 at 12:43 PM
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R$R
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Could I get the headlight wiring diagram? Because, looking at this one is making me think I have a bad body control module. Because I took it into Valvoline one time, and they told me my driver side headlight was getting too much voltage and that its like its stuck on high beam. I also noticed right before it stopped working properly, every time I'd take a left turn, and my wipers would literally stop also I have a random coolant leak that I can't quite pinpoint, so my coolant light randomly turns on and off, but it started happening more frequently before it broke.
Nov 6, 2024 at 1:16 PM
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We started on running rough now we are at headlights. Sorry, we only handle one problem per thread, please post your new question here, you must be logged in.

https://www.2carpros.com/questions/new

Cheers, Ken
Nov 7, 2024 at 5:02 PM
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R$R
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Understandable. I'll post updates here when it's fixed or if I have to work on the transmission.
Nov 8, 2024 at 3:54 PM